HomeField Collin County Service Area
We Serve Collin County And Beyond
We proudly serve the cities and towns of inside of Collin County with complete septic services. We're here to help as long as you need it!
Just click your city name below to see services for your area:
If your septic (OSSF) system is outside city limits in Collin County, Texas, there are several special rules and considerations you’ll need to follow to remain compliant and protect your investment. Below is a checklist of key things to watch out for (state & county) plus practical best practices. Permitting via Collin County (Authorized Agent) For properties outside city limits, Collin County is your permitting authority for On-Site Sewage Facilities (OSSF) / septic systems. https://www.collincountytx.gov/Services/Engineering/Development-Services/on-site-sewage-facilities If you’re building a new structure, altering an existing one, or building a pool on a property that already has a septic system, you must submit a “Review of Existing OSSF for New Construction/Improvement” permit. https://www.collincountytx.gov/Services/Engineering/Development-Services/on-site-sewage-facilities County OSSF Rules & Court Order Collin County has adopted local OSSF rules (via Court Order CO No. 2008-187-03-11) that supplement or in some cases exceed state minimums. You must obey both state rules (30 TAC Chapter 285) and that local order. https://www.collincountytx.gov/Services/Engineering/Development-Services/Documents/On-Site%20Sewage%20Facilities%20Rules%20and%20Regulations%20%28CO.%20No.%202008-187-03-11%29.pdf The county’s rules can impose more stringent standards on lot size, setbacks, maintenance frequency, etc. https://www.collincountytx.gov/Services/Engineering/Development-Services/Documents/On-Site%20Sewage%20Facilities%20Rules%20and%20Regulations%20%28CO.%20No.%202008-187-03-11%29.pdf Lot Size & Usable Acreage Minimums For lots subdivided between 1983 and 2008, a minimum of 1 acre is required (or 1.5 acres if there’s a water well on the lot). For lots subdivided in 2008 or later, you need at least 1 usable acre (or 1.5 acres if there’s a well). “Usable” means that area must be clear of impeding constraints (easements, steep slopes, ponds, etc.). https://www.collincountytx.gov/Services/Engineering/Development-Services/on-site-sewage-facilities If your lot size has been reduced after these dates below those thresholds, it may disqualify you from an OSSF (unless there has been a government taking or other exception). https://www.collincountytx.gov/Services/Engineering/Development-Services/on-site-sewage-facilities License to Operate / Final Inspection Requirement After installation or repair, your system must pass final inspection and receive a License to Operate before the dwelling or structure can be occupied. https://www.triseptic.com/downloads/Collin/collin-combined.pdf If not maintained or inspected over time, the license may be jeopardized (especially for aerobic systems). https://www.triseptic.com/downloads/Collin/collin-combined.pdf Maintenance Contracts, Inspections & Reporting If your system is an aerobic / treatment system, you must maintain a valid maintenance contract at all times. https://www.triseptic.com/downloads/Collin/collin-combined.pdf Initially, the original installer’s contract covers 2 years. After that, the property owner must renew or arrange a contract with a licensed maintenance provider. https://www.triseptic.com/downloads/Collin/collin-combined.pdf Maintenance companies for aerobic systems are required to inspect the system three times per year (i.e. every 4 months) and submit reports to Collin County and the homeowner. https://www.triseptic.com/downloads/Collin/collin-combined.pdf Disinfection (chlorine) must be present in irrigation systems at all times. Only approved chlorine tablets (not swimming pool chlorine) are allowed. https://www.triseptic.com/downloads/Collin/collin-combined.pdf The county has the right to inspect your system (spot checks, complaints, etc.) without prior permission, during regular working hours. https://www.triseptic.com/downloads/Collin/collin-combined.pdf Emergency Repairs & Reporting Certain emergency repairs (e.g. replacing lids, risers, damaged lines) do not require a full permit—but they must be reported in writing to the permitting authority within 72 hours after repairs begin. (Per Texas state OSSF law) https://www.tceq.texas.gov/permitting/ossf/ossfpermits.html For non-emergency larger repairs or changes, you must obtain a repair/upgrade permit via Collin County. You may not unilaterally alter the system (especially aerobic units) without formal approval. https://www.tceq.texas.gov/permitting/ossf/ossfpermits.html Design, Evaluator & Installer Licensing Your system design must come from a licensed Site Evaluator (or Professional Engineer) or Registered Sanitarian. https://www.tceq.texas.gov/licensing/licenses/ The installer must hold the appropriate state OSSF license (Installer I or II) as required for the type of system being installed. https://www.tceq.texas.gov/licensing/licenses/ossflic Maintenance providers must also be licensed or registered. Aerobic system maintenance must be done by licensed maintenance providers unless the homeowner qualifies under certain exemptions (less common). https://www.tceq.texas.gov/licensing/licenses/ossflic State OSSF Rules & Baseline Standards The baseline rules are in 30 TAC Chapter 285, covering spacing, setbacks, treatment levels, minimum system design standards, permitted materials, etc. https://newtools.cira.state.tx.us/upload/page/0983/docs/LandDevAndEmerg/30%20TAC%20Chapter%20285.pdf You must comply with whichever is stricter: the state rule or the county/authorized-agent rule. https://www.triseptic.com/downloads/Collin/collin-combined.pdf Some properties or systems may qualify for exemptions (for example, very large acreage, grandfathered systems, etc.), but you must confirm eligibility with the permitting authority. https://www.tceq.texas.gov/permitting/ossf/ossfpermits.html Change of Ownership / Transfer Requirements If you buy a property with an existing aerobic system, you must file Change of Ownership, Homeowner’s Information, and Maintenance Contract forms with Collin County. https://www.collincountytx.gov/Services/Engineering/Development-Services/on-site-sewage-facilities The maintenance contract must be updated into your name. https://www.collincountytx.gov/Services/Engineering/Development-Services/on-site-sewage-facilities • If your property is located OUTSIDE of city limits – you are required to apply for an OSSF permit through the Collin County Citizen Self-Service Portal. You can find instructions on how to use the portal, as well as other helpful information, Here. • If your property is located INSIDE of city limits – you MAY BE required to apply for an OSSF permit through the Collin County Citizen Self-Service Portal. The Texas Commission on Environmental Quality (TCEQ) maintains a List of the permitting agency (Authorized Agent) for each city. First select “Collin” from the dropdown County list. If your city is not listed, Collin County is your Authorized Agent. Collin County requires three (3) forms when property is sold that has aerobic system: New OSSF Contracts, Maintenance Reports, and Change of Ownership forms will be submitted through our OSSF Report Portal. Any lot divided between 1983 and 2008 (contact Development Services if exact dates in 1983 or 2008 are critical to your project) must start with a minimum of 1 acre (or 1.5 acres if there is a water well on the property) and any lot divided in 2008 or later must start with 1 usable acre (1.5 acres minimum with 1 acre usable if there is a water well on the property). "Usable" means usable for OSSF components/disposal area (excluding most easements, ponds, etc.). If the small lot existed as that same small lot prior to 1983 (you will have to do your own research to find proof that the lot existed prior to 1983 and present that proof to Development Services) and if the designed/installed OSSF complies with all requirements set forth the State and County OSSF regulations, then it is allowed. There are 4 treatment component steps of an Aerobic Septic System. Texas rules (30 TAC Chapter 285) require that an authorized agent (often a county or local authority) investigate complaints within 30 days, notify the complainant of findings, and take enforcement action if violations are confirmed. Legal Information Institute If a local permitting authority (the county or city) fails to act on a complaint or enforce, the state (TCEQ) regional office can be engaged. TCEQ In Rockwall, there is also an interlocal agreement giving the county responsibility to issue septic permits and perform inspections/oversight even in some municipal jurisdictions. rockwall.com The solids produced by the natural biological treatment process. Activated sludge has an abundance of beneficial microbes (“bugs”) and is used to bolster the aerobic treatment process. The level of the surface of the water in a chamber or basin. A v-shaped opening usually found on one side of a weir. The v-notch provides a means of controlling flow into the weir and separating solids from the final effluent. These are the baseline obligations under Texas OSSF law and regulations that counties often adopt or enforce: All construction, alteration, extension, or repair of an OSSF requires a permit and approved plan. TCEQ Local governments (counties or cities) may act as Authorized Agents (AAs) for TCEQ, meaning they administer the OSSF program locally (issue permits, inspect, enforce). TCEQ OSSFs must be designed according to a site evaluation of soils, topography, and local conditions. TCEQ Maintenance and periodic inspections are required (especially for aerobic / alternative systems). Emergency repairs (minor fixes) are allowed without a full permit but must be reported within 72 hours to the permitting authority. TCEQ The authority must respond to complaints, enforce compliance, and may require corrective actions or penalties. TCEQ The system introduces air into the wastewater treatment process to promote the growth of aerobic bacteria, which break down organic matter more effectively than anaerobic bacteria used in conventional systems Owning a septic or aerobic treatment unit means you’re running a mini wastewater system in your yard. Taking care of it keeps your home safe, your yard clean, and your water healthy. 💧 Watch Your Water Use Spread out laundry loads instead of doing many in one day. Don’t overload the system with too much water at once. 🚫 Be Careful What You Flush Skip additives, yeast, or special treatments — your system doesn’t need them. Limit harsh cleaners or chemicals; they kill the good bacteria your system relies on. 🍴 Kitchen Habits Matter Garbage disposals add extra solids that overwhelm the system. The more food waste that goes down the drain, the more often you’ll need pump-outs. 🌱 Take Care of the Spray Field (Aerobic Units) Keep grass or plants growing in the spray area to soak up water and nutrients. Remember: even disinfected water may still carry germs, so avoid standing water. ✅ Stay on Top of Maintenance Follow your maintenance contract and inspection schedule. Be mindful of what goes down the drain — small changes make a big difference. A little care goes a long way. Good habits keep your system working longer, save you money, and protect your family and the environment. Even inside city limits, you may still need to apply for an OSSF permit through Collin County (via their Citizen Self-Service portal) if your city is not the county’s authorized agent. Collin County The Texas Commission on Environmental Quality (TCEQ) maintains a list of which cities act as the local “Authorized Agent” for OSSF permitting. Collin County If your city is already an authorized OSSF permitting agent, then the city’s rules (in addition to state rules) will apply. If you are building a new structure, adding on, or making improvements on a property that already has an OSSF, you must apply for a “Review of Existing OSSF for New Construction/Improvement” permit. Collin County You can’t just assume the existing system is adequate for additional loads without checking. Collin County Collin County’s rules require minimum lot (tract) size requirements for OSSF eligibility. If your lot is too small (or was made smaller after certain dates), it may be ineligible for a septic system unless it qualifies under older “grandfathered” subdivision rules. Collin County The OSSF must have adequate “usable area” for the disposal/delivery components (i.e. drainfields, spray fields, etc.), excluding easements, ponds, etc. Collin County Collin County has a Court Order (CO No. 2008-187-03-11) that imposes more stringent rules than the state minimum for OSSFs. Collin County These might include stricter design rules, inspection requirements, or maintenance obligations beyond what 30 TAC Chapter 285 demands. Tri-County SepticTCEQ In Collin County, your building cannot be occupied until the system passes final inspection and is granted a License to Operate. Tri-County Septic This applies even inside city limits if Collin County is your permitting authority. If your system is not a conventional anaerobic tank + drain field (i.e. uses aerobic treatment or disinfection): You must have a maintenance contract in effect from the date your system is approved. Tri-County SepticCollin County The initial maintenance contract lasts 2 years. After that, you must renew it. Collin County requires renewal paperwork to be submitted 30 days before expiration. Tri-County Septic Maintenance providers must inspect the system at least 3 times per year, roughly every 4 months. Reports go to both you and Collin County. Tri-County Septic For systems with spray (or surface) discharge, chlorine must always be maintained. The homeowner is responsible for ensuring chlorine is present. Only approved chlorine tablets (not pool chlorine) may be used. Tri-County SepticCollin County You must provide access to the system during normal business hours for inspections or spot checks by Collin County or your maintenance provider. Tri-County Septic Once installed and approved, you may not alter the system (e.g. move spray heads, change flow, connect additional buildings) without applying for a Septic Repair / Upgrade Permit. Tri-County Septic Any proposed changes must go through the county (or city agent) review. Anything that isn’t liquid that enters the treatment system. Solids can be trash or sludge. There are 4 treatment component steps of an Aerobic Septic System. Texas rules (30 TAC Chapter 285) require that an authorized agent (often a county or local authority) investigate complaints within 30 days, notify the complainant of findings, and take enforcement action if violations are confirmed. Legal Information Institute If a local permitting authority (the county or city) fails to act on a complaint or enforce, the state (TCEQ) regional office can be engaged. TCEQ In Rockwall, there is also an interlocal agreement giving the county responsibility to issue septic permits and perform inspections/oversight even in some municipal jurisdictions. rockwall.com The solids produced by the natural biological treatment process. Activated sludge has an abundance of beneficial microbes (“bugs”) and is used to bolster the aerobic treatment process. The level of the surface of the water in a chamber or basin. A v-shaped opening usually found on one side of a weir. The v-notch provides a means of controlling flow into the weir and separating solids from the final effluent. All septic systems in Hunt County must be permitted through the Hunt County Health Department / Environmental Health. Hunt County Even when you’re inside a city, Hunt County still retains jurisdiction over private on-site sewage systems. (Cities like Greenville refer septic / aerobic system questions to Hunt County) City of Greenville The county is bound by a TCEQ-approved order to enforce OSSF regulations, meaning county rules must comply with or exceed state minimums. Hunt County Your system must follow the state OSSF rules (30 TAC Chapter 285) as well as any additional county requirements set under their approved order. Hunt County If a lot is being subdivided or developed, the Subdivision & Land Development Regulations for Hunt County include standards for wastewater / OSSF designs. Hunt County The system must meet standard setback, buffer, and soil / site evaluation requirements, just as any OSSF outside city limits would. The property owner is responsible for providing the necessary electrical supply for the OSSF (e.g. wiring, breakers) when required. Tri-County Septic Any equipment (pumps, aerators, controls) must be installed in compliance with county / state electrical and system standards. For systems that require maintenance, Hunt County requires an Affidavit for On-Site Sewage Facility to be filed (often in deed records) to notify future owners of the system’s status. Tri-County Septic You’ll have to submit the permit application, homeowners information sheet, technical information sheet, and other standard documents. Hunt CountyTri-County Septic The county maintains checklists and documentation requirements for all OSSF installations. Hunt County If your system is an aerobic or other alternative system, you’ll need a maintenance contract in place. (The homeowner and installer must sign it.) Tri-County Septic The maintenance provider must inspect and service the system at intervals required by the contract and as required by county/state rules. Reports of maintenance/inspection must be submitted to both the property owner and to Hunt County’s health / environmental department. You must allow access to the system for inspections or investigations. Any changes or upgrades to the system must go through permit review. You can’t alter spray heads, change layout, or expand without county approval. Emergency repairs (for example, a broken pump or damaged riser) may be allowed but generally must be reported in writing to the county within a given timeframe (often 72 hours). This mirrors state OSSF rules. (See TCEQ permit requirements) TCEQ These are the baseline obligations under Texas OSSF law and regulations that counties often adopt or enforce: All construction, alteration, extension, or repair of an OSSF requires a permit and approved plan. TCEQ Local governments (counties or cities) may act as Authorized Agents (AAs) for TCEQ, meaning they administer the OSSF program locally (issue permits, inspect, enforce). TCEQ OSSFs must be designed according to a site evaluation of soils, topography, and local conditions. TCEQ Maintenance and periodic inspections are required (especially for aerobic / alternative systems). Emergency repairs (minor fixes) are allowed without a full permit but must be reported within 72 hours to the permitting authority. TCEQ The authority must respond to complaints, enforce compliance, and may require corrective actions or penalties. TCEQ The system introduces air into the wastewater treatment process to promote the growth of aerobic bacteria, which break down organic matter more effectively than anaerobic bacteria used in conventional systems Owning a septic or aerobic treatment unit means you’re running a mini wastewater system in your yard. Taking care of it keeps your home safe, your yard clean, and your water healthy. 💧 Watch Your Water Use Spread out laundry loads instead of doing many in one day. Don’t overload the system with too much water at once. 🚫 Be Careful What You Flush Skip additives, yeast, or special treatments — your system doesn’t need them. Limit harsh cleaners or chemicals; they kill the good bacteria your system relies on. 🍴 Kitchen Habits Matter Garbage disposals add extra solids that overwhelm the system. The more food waste that goes down the drain, the more often you’ll need pump-outs. 🌱 Take Care of the Spray Field (Aerobic Units) Keep grass or plants growing in the spray area to soak up water and nutrients. Remember: even disinfected water may still carry germs, so avoid standing water. ✅ Stay on Top of Maintenance Follow your maintenance contract and inspection schedule. Be mindful of what goes down the drain — small changes make a big difference. A little care goes a long way. Good habits keep your system working longer, save you money, and protect your family and the environment. Anything that isn’t liquid that enters the treatment system. Solids can be trash or sludge. There are 4 treatment component steps of an Aerobic Septic System. Texas rules (30 TAC Chapter 285) require that an authorized agent (often a county or local authority) investigate complaints within 30 days, notify the complainant of findings, and take enforcement action if violations are confirmed. Legal Information Institute If a local permitting authority (the county or city) fails to act on a complaint or enforce, the state (TCEQ) regional office can be engaged. TCEQ In Rockwall, there is also an interlocal agreement giving the county responsibility to issue septic permits and perform inspections/oversight even in some municipal jurisdictions. rockwall.com The solids produced by the natural biological treatment process. Activated sludge has an abundance of beneficial microbes (“bugs”) and is used to bolster the aerobic treatment process. The level of the surface of the water in a chamber or basin. A v-shaped opening usually found on one side of a weir. The v-notch provides a means of controlling flow into the weir and separating solids from the final effluent. All septic systems in Hunt County must be permitted through the Hunt County Health Department / Environmental Health. Hunt County Even when you’re inside a city, Hunt County still retains jurisdiction over private on-site sewage systems. (Cities like Greenville refer septic / aerobic system questions to Hunt County) City of Greenville The county is bound by a TCEQ-approved order to enforce OSSF regulations, meaning county rules must comply with or exceed state minimums. Hunt County Your system must follow the state OSSF rules (30 TAC Chapter 285) as well as any additional county requirements set under their approved order. Hunt County If a lot is being subdivided or developed, the Subdivision & Land Development Regulations for Hunt County include standards for wastewater / OSSF designs. Hunt County The system must meet standard setback, buffer, and soil / site evaluation requirements, just as any OSSF outside city limits would. The property owner is responsible for providing the necessary electrical supply for the OSSF (e.g. wiring, breakers) when required. Tri-County Septic Any equipment (pumps, aerators, controls) must be installed in compliance with county / state electrical and system standards. For systems that require maintenance, Hunt County requires an Affidavit for On-Site Sewage Facility to be filed (often in deed records) to notify future owners of the system’s status. Tri-County Septic You’ll have to submit the permit application, homeowners information sheet, technical information sheet, and other standard documents. Hunt CountyTri-County Septic The county maintains checklists and documentation requirements for all OSSF installations. Hunt County If your system is an aerobic or other alternative system, you’ll need a maintenance contract in place. (The homeowner and installer must sign it.) Tri-County Septic The maintenance provider must inspect and service the system at intervals required by the contract and as required by county/state rules. Reports of maintenance/inspection must be submitted to both the property owner and to Hunt County’s health / environmental department. You must allow access to the system for inspections or investigations. Any changes or upgrades to the system must go through permit review. You can’t alter spray heads, change layout, or expand without county approval. Emergency repairs (for example, a broken pump or damaged riser) may be allowed but generally must be reported in writing to the county within a given timeframe (often 72 hours). This mirrors state OSSF rules. (See TCEQ permit requirements) TCEQ These are the baseline obligations under Texas OSSF law and regulations that counties often adopt or enforce: All construction, alteration, extension, or repair of an OSSF requires a permit and approved plan. TCEQ Local governments (counties or cities) may act as Authorized Agents (AAs) for TCEQ, meaning they administer the OSSF program locally (issue permits, inspect, enforce). TCEQ OSSFs must be designed according to a site evaluation of soils, topography, and local conditions. TCEQ Maintenance and periodic inspections are required (especially for aerobic / alternative systems). Emergency repairs (minor fixes) are allowed without a full permit but must be reported within 72 hours to the permitting authority. TCEQ The authority must respond to complaints, enforce compliance, and may require corrective actions or penalties. TCEQ The system introduces air into the wastewater treatment process to promote the growth of aerobic bacteria, which break down organic matter more effectively than anaerobic bacteria used in conventional systems Owning a septic or aerobic treatment unit means you’re running a mini wastewater system in your yard. Taking care of it keeps your home safe, your yard clean, and your water healthy. 💧 Watch Your Water Use Spread out laundry loads instead of doing many in one day. Don’t overload the system with too much water at once. 🚫 Be Careful What You Flush Skip additives, yeast, or special treatments — your system doesn’t need them. Limit harsh cleaners or chemicals; they kill the good bacteria your system relies on. 🍴 Kitchen Habits Matter Garbage disposals add extra solids that overwhelm the system. The more food waste that goes down the drain, the more often you’ll need pump-outs. 🌱 Take Care of the Spray Field (Aerobic Units) Keep grass or plants growing in the spray area to soak up water and nutrients. Remember: even disinfected water may still carry germs, so avoid standing water. ✅ Stay on Top of Maintenance Follow your maintenance contract and inspection schedule. Be mindful of what goes down the drain — small changes make a big difference. A little care goes a long way. Good habits keep your system working longer, save you money, and protect your family and the environment. Anything that isn’t liquid that enters the treatment system. Solids can be trash or sludge. If your septic (OSSF) system is outside city limits in Collin County, Texas, there are several special rules and considerations you’ll need to follow to remain compliant and protect your investment. Below is a checklist of key things to watch out for (state & county) plus practical best practices. Permitting via Collin County (Authorized Agent) For properties outside city limits, Collin County is your permitting authority for On-Site Sewage Facilities (OSSF) / septic systems. https://www.collincountytx.gov/Services/Engineering/Development-Services/on-site-sewage-facilities If you’re building a new structure, altering an existing one, or building a pool on a property that already has a septic system, you must submit a “Review of Existing OSSF for New Construction/Improvement” permit. https://www.collincountytx.gov/Services/Engineering/Development-Services/on-site-sewage-facilities County OSSF Rules & Court Order Collin County has adopted local OSSF rules (via Court Order CO No. 2008-187-03-11) that supplement or in some cases exceed state minimums. You must obey both state rules (30 TAC Chapter 285) and that local order. https://www.collincountytx.gov/Services/Engineering/Development-Services/Documents/On-Site%20Sewage%20Facilities%20Rules%20and%20Regulations%20%28CO.%20No.%202008-187-03-11%29.pdf The county’s rules can impose more stringent standards on lot size, setbacks, maintenance frequency, etc. https://www.collincountytx.gov/Services/Engineering/Development-Services/Documents/On-Site%20Sewage%20Facilities%20Rules%20and%20Regulations%20%28CO.%20No.%202008-187-03-11%29.pdf Lot Size & Usable Acreage Minimums For lots subdivided between 1983 and 2008, a minimum of 1 acre is required (or 1.5 acres if there’s a water well on the lot). For lots subdivided in 2008 or later, you need at least 1 usable acre (or 1.5 acres if there’s a well). “Usable” means that area must be clear of impeding constraints (easements, steep slopes, ponds, etc.). https://www.collincountytx.gov/Services/Engineering/Development-Services/on-site-sewage-facilities If your lot size has been reduced after these dates below those thresholds, it may disqualify you from an OSSF (unless there has been a government taking or other exception). https://www.collincountytx.gov/Services/Engineering/Development-Services/on-site-sewage-facilities License to Operate / Final Inspection Requirement After installation or repair, your system must pass final inspection and receive a License to Operate before the dwelling or structure can be occupied. https://www.triseptic.com/downloads/Collin/collin-combined.pdf If not maintained or inspected over time, the license may be jeopardized (especially for aerobic systems). https://www.triseptic.com/downloads/Collin/collin-combined.pdf Maintenance Contracts, Inspections & Reporting If your system is an aerobic / treatment system, you must maintain a valid maintenance contract at all times. https://www.triseptic.com/downloads/Collin/collin-combined.pdf Initially, the original installer’s contract covers 2 years. After that, the property owner must renew or arrange a contract with a licensed maintenance provider. https://www.triseptic.com/downloads/Collin/collin-combined.pdf Maintenance companies for aerobic systems are required to inspect the system three times per year (i.e. every 4 months) and submit reports to Collin County and the homeowner. https://www.triseptic.com/downloads/Collin/collin-combined.pdf Disinfection (chlorine) must be present in irrigation systems at all times. Only approved chlorine tablets (not swimming pool chlorine) are allowed. https://www.triseptic.com/downloads/Collin/collin-combined.pdf The county has the right to inspect your system (spot checks, complaints, etc.) without prior permission, during regular working hours. https://www.triseptic.com/downloads/Collin/collin-combined.pdf Emergency Repairs & Reporting Certain emergency repairs (e.g. replacing lids, risers, damaged lines) do not require a full permit—but they must be reported in writing to the permitting authority within 72 hours after repairs begin. (Per Texas state OSSF law) https://www.tceq.texas.gov/permitting/ossf/ossfpermits.html For non-emergency larger repairs or changes, you must obtain a repair/upgrade permit via Collin County. You may not unilaterally alter the system (especially aerobic units) without formal approval. https://www.tceq.texas.gov/permitting/ossf/ossfpermits.html Design, Evaluator & Installer Licensing Your system design must come from a licensed Site Evaluator (or Professional Engineer) or Registered Sanitarian. https://www.tceq.texas.gov/licensing/licenses/ The installer must hold the appropriate state OSSF license (Installer I or II) as required for the type of system being installed. https://www.tceq.texas.gov/licensing/licenses/ossflic Maintenance providers must also be licensed or registered. Aerobic system maintenance must be done by licensed maintenance providers unless the homeowner qualifies under certain exemptions (less common). https://www.tceq.texas.gov/licensing/licenses/ossflic State OSSF Rules & Baseline Standards The baseline rules are in 30 TAC Chapter 285, covering spacing, setbacks, treatment levels, minimum system design standards, permitted materials, etc. https://newtools.cira.state.tx.us/upload/page/0983/docs/LandDevAndEmerg/30%20TAC%20Chapter%20285.pdf You must comply with whichever is stricter: the state rule or the county/authorized-agent rule. https://www.triseptic.com/downloads/Collin/collin-combined.pdf Some properties or systems may qualify for exemptions (for example, very large acreage, grandfathered systems, etc.), but you must confirm eligibility with the permitting authority. https://www.tceq.texas.gov/permitting/ossf/ossfpermits.html Change of Ownership / Transfer Requirements If you buy a property with an existing aerobic system, you must file Change of Ownership, Homeowner’s Information, and Maintenance Contract forms with Collin County. https://www.collincountytx.gov/Services/Engineering/Development-Services/on-site-sewage-facilities The maintenance contract must be updated into your name. https://www.collincountytx.gov/Services/Engineering/Development-Services/on-site-sewage-facilities • If your property is located OUTSIDE of city limits – you are required to apply for an OSSF permit through the Collin County Citizen Self-Service Portal. You can find instructions on how to use the portal, as well as other helpful information, Here. • If your property is located INSIDE of city limits – you MAY BE required to apply for an OSSF permit through the Collin County Citizen Self-Service Portal. The Texas Commission on Environmental Quality (TCEQ) maintains a List of the permitting agency (Authorized Agent) for each city. First select “Collin” from the dropdown County list. If your city is not listed, Collin County is your Authorized Agent. Collin County requires three (3) forms when property is sold that has aerobic system: New OSSF Contracts, Maintenance Reports, and Change of Ownership forms will be submitted through our OSSF Report Portal. Any lot divided between 1983 and 2008 (contact Development Services if exact dates in 1983 or 2008 are critical to your project) must start with a minimum of 1 acre (or 1.5 acres if there is a water well on the property) and any lot divided in 2008 or later must start with 1 usable acre (1.5 acres minimum with 1 acre usable if there is a water well on the property). "Usable" means usable for OSSF components/disposal area (excluding most easements, ponds, etc.). If the small lot existed as that same small lot prior to 1983 (you will have to do your own research to find proof that the lot existed prior to 1983 and present that proof to Development Services) and if the designed/installed OSSF complies with all requirements set forth the State and County OSSF regulations, then it is allowed. There are 4 treatment component steps of an Aerobic Septic System. Texas rules (30 TAC Chapter 285) require that an authorized agent (often a county or local authority) investigate complaints within 30 days, notify the complainant of findings, and take enforcement action if violations are confirmed. Legal Information Institute If a local permitting authority (the county or city) fails to act on a complaint or enforce, the state (TCEQ) regional office can be engaged. TCEQ In Rockwall, there is also an interlocal agreement giving the county responsibility to issue septic permits and perform inspections/oversight even in some municipal jurisdictions. rockwall.com The solids produced by the natural biological treatment process. Activated sludge has an abundance of beneficial microbes (“bugs”) and is used to bolster the aerobic treatment process. The level of the surface of the water in a chamber or basin. A v-shaped opening usually found on one side of a weir. The v-notch provides a means of controlling flow into the weir and separating solids from the final effluent. These are the baseline obligations under Texas OSSF law and regulations that counties often adopt or enforce: All construction, alteration, extension, or repair of an OSSF requires a permit and approved plan. TCEQ Local governments (counties or cities) may act as Authorized Agents (AAs) for TCEQ, meaning they administer the OSSF program locally (issue permits, inspect, enforce). TCEQ OSSFs must be designed according to a site evaluation of soils, topography, and local conditions. TCEQ Maintenance and periodic inspections are required (especially for aerobic / alternative systems). Emergency repairs (minor fixes) are allowed without a full permit but must be reported within 72 hours to the permitting authority. TCEQ The authority must respond to complaints, enforce compliance, and may require corrective actions or penalties. TCEQ The system introduces air into the wastewater treatment process to promote the growth of aerobic bacteria, which break down organic matter more effectively than anaerobic bacteria used in conventional systems Owning a septic or aerobic treatment unit means you’re running a mini wastewater system in your yard. Taking care of it keeps your home safe, your yard clean, and your water healthy. 💧 Watch Your Water Use Spread out laundry loads instead of doing many in one day. Don’t overload the system with too much water at once. 🚫 Be Careful What You Flush Skip additives, yeast, or special treatments — your system doesn’t need them. Limit harsh cleaners or chemicals; they kill the good bacteria your system relies on. 🍴 Kitchen Habits Matter Garbage disposals add extra solids that overwhelm the system. The more food waste that goes down the drain, the more often you’ll need pump-outs. 🌱 Take Care of the Spray Field (Aerobic Units) Keep grass or plants growing in the spray area to soak up water and nutrients. Remember: even disinfected water may still carry germs, so avoid standing water. ✅ Stay on Top of Maintenance Follow your maintenance contract and inspection schedule. Be mindful of what goes down the drain — small changes make a big difference. A little care goes a long way. Good habits keep your system working longer, save you money, and protect your family and the environment. Even inside city limits, you may still need to apply for an OSSF permit through Collin County (via their Citizen Self-Service portal) if your city is not the county’s authorized agent. Collin County The Texas Commission on Environmental Quality (TCEQ) maintains a list of which cities act as the local “Authorized Agent” for OSSF permitting. Collin County If your city is already an authorized OSSF permitting agent, then the city’s rules (in addition to state rules) will apply. If you are building a new structure, adding on, or making improvements on a property that already has an OSSF, you must apply for a “Review of Existing OSSF for New Construction/Improvement” permit. Collin County You can’t just assume the existing system is adequate for additional loads without checking. Collin County Collin County’s rules require minimum lot (tract) size requirements for OSSF eligibility. If your lot is too small (or was made smaller after certain dates), it may be ineligible for a septic system unless it qualifies under older “grandfathered” subdivision rules. Collin County The OSSF must have adequate “usable area” for the disposal/delivery components (i.e. drainfields, spray fields, etc.), excluding easements, ponds, etc. Collin County Collin County has a Court Order (CO No. 2008-187-03-11) that imposes more stringent rules than the state minimum for OSSFs. Collin County These might include stricter design rules, inspection requirements, or maintenance obligations beyond what 30 TAC Chapter 285 demands. Tri-County SepticTCEQ In Collin County, your building cannot be occupied until the system passes final inspection and is granted a License to Operate. Tri-County Septic This applies even inside city limits if Collin County is your permitting authority. If your system is not a conventional anaerobic tank + drain field (i.e. uses aerobic treatment or disinfection): You must have a maintenance contract in effect from the date your system is approved. Tri-County SepticCollin County The initial maintenance contract lasts 2 years. After that, you must renew it. Collin County requires renewal paperwork to be submitted 30 days before expiration. Tri-County Septic Maintenance providers must inspect the system at least 3 times per year, roughly every 4 months. Reports go to both you and Collin County. Tri-County Septic For systems with spray (or surface) discharge, chlorine must always be maintained. The homeowner is responsible for ensuring chlorine is present. Only approved chlorine tablets (not pool chlorine) may be used. Tri-County SepticCollin County You must provide access to the system during normal business hours for inspections or spot checks by Collin County or your maintenance provider. Tri-County Septic Once installed and approved, you may not alter the system (e.g. move spray heads, change flow, connect additional buildings) without applying for a Septic Repair / Upgrade Permit. Tri-County Septic Any proposed changes must go through the county (or city agent) review. Anything that isn’t liquid that enters the treatment system. Solids can be trash or sludge. There are 4 treatment component steps of an Aerobic Septic System. Texas rules (30 TAC Chapter 285) require that an authorized agent (often a county or local authority) investigate complaints within 30 days, notify the complainant of findings, and take enforcement action if violations are confirmed. Legal Information Institute If a local permitting authority (the county or city) fails to act on a complaint or enforce, the state (TCEQ) regional office can be engaged. TCEQ In Rockwall, there is also an interlocal agreement giving the county responsibility to issue septic permits and perform inspections/oversight even in some municipal jurisdictions. rockwall.com The solids produced by the natural biological treatment process. Activated sludge has an abundance of beneficial microbes (“bugs”) and is used to bolster the aerobic treatment process. The level of the surface of the water in a chamber or basin. A v-shaped opening usually found on one side of a weir. The v-notch provides a means of controlling flow into the weir and separating solids from the final effluent. These are the baseline obligations under Texas OSSF law and regulations that counties often adopt or enforce: All construction, alteration, extension, or repair of an OSSF requires a permit and approved plan. TCEQ Local governments (counties or cities) may act as Authorized Agents (AAs) for TCEQ, meaning they administer the OSSF program locally (issue permits, inspect, enforce). TCEQ OSSFs must be designed according to a site evaluation of soils, topography, and local conditions. TCEQ Maintenance and periodic inspections are required (especially for aerobic / alternative systems). Emergency repairs (minor fixes) are allowed without a full permit but must be reported within 72 hours to the permitting authority. TCEQ The authority must respond to complaints, enforce compliance, and may require corrective actions or penalties. TCEQ The system introduces air into the wastewater treatment process to promote the growth of aerobic bacteria, which break down organic matter more effectively than anaerobic bacteria used in conventional systems Owning a septic or aerobic treatment unit means you’re running a mini wastewater system in your yard. Taking care of it keeps your home safe, your yard clean, and your water healthy. 💧 Watch Your Water Use Spread out laundry loads instead of doing many in one day. Don’t overload the system with too much water at once. 🚫 Be Careful What You Flush Skip additives, yeast, or special treatments — your system doesn’t need them. Limit harsh cleaners or chemicals; they kill the good bacteria your system relies on. 🍴 Kitchen Habits Matter Garbage disposals add extra solids that overwhelm the system. The more food waste that goes down the drain, the more often you’ll need pump-outs. 🌱 Take Care of the Spray Field (Aerobic Units) Keep grass or plants growing in the spray area to soak up water and nutrients. Remember: even disinfected water may still carry germs, so avoid standing water. ✅ Stay on Top of Maintenance Follow your maintenance contract and inspection schedule. Be mindful of what goes down the drain — small changes make a big difference. A little care goes a long way. Good habits keep your system working longer, save you money, and protect your family and the environment. Anything that isn’t liquid that enters the treatment system. Solids can be trash or sludge. There are 4 treatment component steps of an Aerobic Septic System. Texas rules (30 TAC Chapter 285) require that an authorized agent (often a county or local authority) investigate complaints within 30 days, notify the complainant of findings, and take enforcement action if violations are confirmed. Legal Information Institute If a local permitting authority (the county or city) fails to act on a complaint or enforce, the state (TCEQ) regional office can be engaged. TCEQ In Rockwall, there is also an interlocal agreement giving the county responsibility to issue septic permits and perform inspections/oversight even in some municipal jurisdictions. rockwall.com The solids produced by the natural biological treatment process. Activated sludge has an abundance of beneficial microbes (“bugs”) and is used to bolster the aerobic treatment process. The level of the surface of the water in a chamber or basin. A v-shaped opening usually found on one side of a weir. The v-notch provides a means of controlling flow into the weir and separating solids from the final effluent. These are the baseline obligations under Texas OSSF law and regulations that counties often adopt or enforce: All construction, alteration, extension, or repair of an OSSF requires a permit and approved plan. TCEQ Local governments (counties or cities) may act as Authorized Agents (AAs) for TCEQ, meaning they administer the OSSF program locally (issue permits, inspect, enforce). TCEQ OSSFs must be designed according to a site evaluation of soils, topography, and local conditions. TCEQ Maintenance and periodic inspections are required (especially for aerobic / alternative systems). Emergency repairs (minor fixes) are allowed without a full permit but must be reported within 72 hours to the permitting authority. TCEQ The authority must respond to complaints, enforce compliance, and may require corrective actions or penalties. TCEQ The system introduces air into the wastewater treatment process to promote the growth of aerobic bacteria, which break down organic matter more effectively than anaerobic bacteria used in conventional systems Owning a septic or aerobic treatment unit means you’re running a mini wastewater system in your yard. Taking care of it keeps your home safe, your yard clean, and your water healthy. 💧 Watch Your Water Use Spread out laundry loads instead of doing many in one day. Don’t overload the system with too much water at once. 🚫 Be Careful What You Flush Skip additives, yeast, or special treatments — your system doesn’t need them. Limit harsh cleaners or chemicals; they kill the good bacteria your system relies on. 🍴 Kitchen Habits Matter Garbage disposals add extra solids that overwhelm the system. The more food waste that goes down the drain, the more often you’ll need pump-outs. 🌱 Take Care of the Spray Field (Aerobic Units) Keep grass or plants growing in the spray area to soak up water and nutrients. Remember: even disinfected water may still carry germs, so avoid standing water. ✅ Stay on Top of Maintenance Follow your maintenance contract and inspection schedule. Be mindful of what goes down the drain — small changes make a big difference. A little care goes a long way. Good habits keep your system working longer, save you money, and protect your family and the environment. Anything that isn’t liquid that enters the treatment system. Solids can be trash or sludge. There are 4 treatment component steps of an Aerobic Septic System. Texas rules (30 TAC Chapter 285) require that an authorized agent (often a county or local authority) investigate complaints within 30 days, notify the complainant of findings, and take enforcement action if violations are confirmed. Legal Information Institute If a local permitting authority (the county or city) fails to act on a complaint or enforce, the state (TCEQ) regional office can be engaged. TCEQ In Rockwall, there is also an interlocal agreement giving the county responsibility to issue septic permits and perform inspections/oversight even in some municipal jurisdictions. rockwall.com The solids produced by the natural biological treatment process. Activated sludge has an abundance of beneficial microbes (“bugs”) and is used to bolster the aerobic treatment process. The level of the surface of the water in a chamber or basin. A v-shaped opening usually found on one side of a weir. The v-notch provides a means of controlling flow into the weir and separating solids from the final effluent. All septic systems in Hunt County must be permitted through the Hunt County Health Department / Environmental Health. Hunt County Even when you’re inside a city, Hunt County still retains jurisdiction over private on-site sewage systems. (Cities like Greenville refer septic / aerobic system questions to Hunt County) City of Greenville The county is bound by a TCEQ-approved order to enforce OSSF regulations, meaning county rules must comply with or exceed state minimums. Hunt County Your system must follow the state OSSF rules (30 TAC Chapter 285) as well as any additional county requirements set under their approved order. Hunt County If a lot is being subdivided or developed, the Subdivision & Land Development Regulations for Hunt County include standards for wastewater / OSSF designs. Hunt County The system must meet standard setback, buffer, and soil / site evaluation requirements, just as any OSSF outside city limits would. The property owner is responsible for providing the necessary electrical supply for the OSSF (e.g. wiring, breakers) when required. Tri-County Septic Any equipment (pumps, aerators, controls) must be installed in compliance with county / state electrical and system standards. For systems that require maintenance, Hunt County requires an Affidavit for On-Site Sewage Facility to be filed (often in deed records) to notify future owners of the system’s status. Tri-County Septic You’ll have to submit the permit application, homeowners information sheet, technical information sheet, and other standard documents. Hunt CountyTri-County Septic The county maintains checklists and documentation requirements for all OSSF installations. Hunt County If your system is an aerobic or other alternative system, you’ll need a maintenance contract in place. (The homeowner and installer must sign it.) Tri-County Septic The maintenance provider must inspect and service the system at intervals required by the contract and as required by county/state rules. Reports of maintenance/inspection must be submitted to both the property owner and to Hunt County’s health / environmental department. You must allow access to the system for inspections or investigations. Any changes or upgrades to the system must go through permit review. You can’t alter spray heads, change layout, or expand without county approval. Emergency repairs (for example, a broken pump or damaged riser) may be allowed but generally must be reported in writing to the county within a given timeframe (often 72 hours). This mirrors state OSSF rules. (See TCEQ permit requirements) TCEQ These are the baseline obligations under Texas OSSF law and regulations that counties often adopt or enforce: All construction, alteration, extension, or repair of an OSSF requires a permit and approved plan. TCEQ Local governments (counties or cities) may act as Authorized Agents (AAs) for TCEQ, meaning they administer the OSSF program locally (issue permits, inspect, enforce). TCEQ OSSFs must be designed according to a site evaluation of soils, topography, and local conditions. TCEQ Maintenance and periodic inspections are required (especially for aerobic / alternative systems). Emergency repairs (minor fixes) are allowed without a full permit but must be reported within 72 hours to the permitting authority. TCEQ The authority must respond to complaints, enforce compliance, and may require corrective actions or penalties. TCEQ The system introduces air into the wastewater treatment process to promote the growth of aerobic bacteria, which break down organic matter more effectively than anaerobic bacteria used in conventional systems Owning a septic or aerobic treatment unit means you’re running a mini wastewater system in your yard. Taking care of it keeps your home safe, your yard clean, and your water healthy. 💧 Watch Your Water Use Spread out laundry loads instead of doing many in one day. Don’t overload the system with too much water at once. 🚫 Be Careful What You Flush Skip additives, yeast, or special treatments — your system doesn’t need them. Limit harsh cleaners or chemicals; they kill the good bacteria your system relies on. 🍴 Kitchen Habits Matter Garbage disposals add extra solids that overwhelm the system. The more food waste that goes down the drain, the more often you’ll need pump-outs. 🌱 Take Care of the Spray Field (Aerobic Units) Keep grass or plants growing in the spray area to soak up water and nutrients. Remember: even disinfected water may still carry germs, so avoid standing water. ✅ Stay on Top of Maintenance Follow your maintenance contract and inspection schedule. Be mindful of what goes down the drain — small changes make a big difference. A little care goes a long way. Good habits keep your system working longer, save you money, and protect your family and the environment. Anything that isn’t liquid that enters the treatment system. Solids can be trash or sludge. There are 4 treatment component steps of an Aerobic Septic System. Texas rules (30 TAC Chapter 285) require that an authorized agent (often a county or local authority) investigate complaints within 30 days, notify the complainant of findings, and take enforcement action if violations are confirmed. Legal Information Institute If a local permitting authority (the county or city) fails to act on a complaint or enforce, the state (TCEQ) regional office can be engaged. TCEQ In Rockwall, there is also an interlocal agreement giving the county responsibility to issue septic permits and perform inspections/oversight even in some municipal jurisdictions. rockwall.com The solids produced by the natural biological treatment process. Activated sludge has an abundance of beneficial microbes (“bugs”) and is used to bolster the aerobic treatment process. The level of the surface of the water in a chamber or basin. A v-shaped opening usually found on one side of a weir. The v-notch provides a means of controlling flow into the weir and separating solids from the final effluent. These are the baseline obligations under Texas OSSF law and regulations that counties often adopt or enforce: All construction, alteration, extension, or repair of an OSSF requires a permit and approved plan. TCEQ Local governments (counties or cities) may act as Authorized Agents (AAs) for TCEQ, meaning they administer the OSSF program locally (issue permits, inspect, enforce). TCEQ OSSFs must be designed according to a site evaluation of soils, topography, and local conditions. TCEQ Maintenance and periodic inspections are required (especially for aerobic / alternative systems). Emergency repairs (minor fixes) are allowed without a full permit but must be reported within 72 hours to the permitting authority. TCEQ The authority must respond to complaints, enforce compliance, and may require corrective actions or penalties. TCEQ The system introduces air into the wastewater treatment process to promote the growth of aerobic bacteria, which break down organic matter more effectively than anaerobic bacteria used in conventional systems https://www.triseptic.com/downloads/Rockwall%20County/rockwall-county-install-forms.pdf Owning a septic or aerobic treatment unit means you’re running a mini wastewater system in your yard. Taking care of it keeps your home safe, your yard clean, and your water healthy. 💧 Watch Your Water Use Spread out laundry loads instead of doing many in one day. Don’t overload the system with too much water at once. 🚫 Be Careful What You Flush Skip additives, yeast, or special treatments — your system doesn’t need them. Limit harsh cleaners or chemicals; they kill the good bacteria your system relies on. 🍴 Kitchen Habits Matter Garbage disposals add extra solids that overwhelm the system. The more food waste that goes down the drain, the more often you’ll need pump-outs. 🌱 Take Care of the Spray Field (Aerobic Units) Keep grass or plants growing in the spray area to soak up water and nutrients. Remember: even disinfected water may still carry germs, so avoid standing water. ✅ Stay on Top of Maintenance Follow your maintenance contract and inspection schedule. Be mindful of what goes down the drain — small changes make a big difference. A little care goes a long way. Good habits keep your system working longer, save you money, and protect your family and the environment. Even inside city limits, the Rockwall County Environmental Health Coordinator is responsible for OSSF permitting, inspections, and enforcement in many cases. rockwallcountytexas.com Before issuing building permits, cities require that OSSF system plans and related documentation be approved by the county’s designated representative. rockwallcountytexas.com When applying for a building permit within a city, part of the requirement is that your OSSF system has the proper county approval (or city + county coordination) in place. rockwallcountytexas.com Rockwall County requires that each dwelling’s septic system be installed on a lot of at least 1.5 acres (1½ acres) of “suitable land.” rockwallcountytexas.com The OSSF permit application must include a site survey showing the system’s location, property boundaries, setbacks, and demonstrating it meets required distance separations to property lines, buildings, water sources, etc. rockwallcountytexas.com Your design must follow county and state minimum standards (30 TAC Chapter 285), but local rules may impose more stringent setbacks or buffer requirements. Any repairs, modifications, or extensions to your existing OSSF (especially when changing the footprint, adding spray fields, or upgrading to an alternative system) will require county approval via a repair or modification application. rockwallcountytexas.com Unauthorized alterations without permits can lead to noncompliance or enforcement action by either the city or county. The county enforces Health & Safety Codes, Public Nuisance Laws, and septic system rules. rockwallcountytexas.com The owner must allow access to the system for inspections or compliance checks by the county or its agent. rockwallcountytexas.com If your system fails or causes a nuisance (odor, sewage surfacing, contamination), the county (or Environmental Health office) can require corrective action or enforcement. rockwallcountytexas.com Anything that isn’t liquid that enters the treatment system. Solids can be trash or sludge.State & Local Requirements
How Does Your Region Affect Your Septic System?
Considerations For Collin County
Key Regulatory & Permitting Considerations
IF YOU ARE BUILDING A NEW STRUCTURE THAT WILL CONNECT TO A NEW OSSF, THEN APPLY FOR YOUR DEVELOPMENT PERMIT FIRST AND STAFF WILL THEN SEND AN ASSOCIATED OSSF PERMIT THROUGH YOUR PORTAL TO BE COMPLETED BY YOU. DO NOT APPLY FOR A SEPARATE DEVELOPMENT PERMIT AND OSSF PERMIT.
If Collin County is your permitting authority and you are adding a new structure, altering an existing structure or building a swimming pool on a property with an existing OSSF, you are required to apply for a Review of Existing OSSF for New Construction/Improvement permit through the Collin County Citizen Self-Service Portal.
(1) Change of Ownership & (2) Aerobic Wastewater Homeowner's Information sheet, and
(3) Maintenance contract in new owner's name (must be obtained from your licensed maintenance provider).
Submit the forms through our OSSF Report Portal.
Whether or not an OSSF can be designed and installed, meeting all current State and County OSSF regulations, for that specific lot cannot be determined until you hire a 3rd party Registered Sanitarian or Professional Engineer to evaluate the site and design a system.
If the property was made smaller than the required acreage after the aforementioned dates, the property is ineligible for an OSSF. PLEASE NOTE THAT PROPERTIES AFFECTED BY A GOVERNMENT TAKING (FOR A ROADWAY, ETC.) MAY STILL BE ELIGIBLE FOR AN OSSF. CONTACT developmentservices@co.collin.tx.us WITH PROOF OF THE GOVERNMENT TAKING FOR REVIEW.Authorized Agent COLLIN COUNTY AUTHORIZED AGENT Permit Office
Location4690 Community Ave, Ste 200
MCKINNEY , TX, 75071Web Address https://www.collincountytx.gov/Services/Engineering/Development-Services/on-site-sewage-facilities Area Served entire County except Cities of Dallas & Murphy, and other AAs: Fairview, Farmersville, Frisco, Nevada, Royse City Mailing Address 825 N MCDONALD ST STE 170
MCKINNEY, TX, 75069 - 2175Primary Contact MISTY BROWN Primary Contact Phone (972) 548-5585 Primary Contact Email MBROWN@CO.COLLIN.TX.US Office Hours M-F 7:30am-4:00pm Fax (972) 548-5555 Status Current Research
Council Fee
Account
Number620046 Current Order
(Click to download)620046.pdf Who Enforces OSSF in Each County
County Enforcing Authority / Department Role & Notes Collin County Collin County Development Services / Engineering – OSSF program They issue permits, inspect systems, enforce rules in unincorporated areas, handle complaints and spot checks. Collin County Hunt County Hunt County Health Department / Environmental Officers They manage permit applications, inspections, maintenance oversight, and enforcement of septic / aerobic systems in Hunt County. huntcounty.net Rockwall County Rockwall County Environmental Health Coordinator / County Environmental Health They perform OSSF permitting, inspections, and enforce Texas Health & Safety codes and local ordinances. rockwallcountytexas.com 📜 Legal & Regulatory Backing & Process
General (State / TCEQ) OSSF Responsibilities
1. Which Permitting Authority Applies
2. Review of Existing OSSF when making improvements
3. Lot Size / Minimum Acreage Requirements
4. Standards Beyond State Minimums
5. License to Operate / Final Inspection
6. Maintenance, Reporting & Chlorination (for aerobic systems or alternative systems)
7. No Unauthorized Alterations
Considerations For Royse City
Authorized Agent ROCKWALL COUNTY AUTHORIZED AGENT Permit Office
Location1101 E Yellowjacket Ln STE 130
ROCKWALL , TX, 75087Web Address https://www.rockwallcountytexas.com/245/Environmental-Health-Coordinator Area Served City of Rockwall, City of Royse City (AA), unincorporated Rockwall County Mailing Address 1101 E YELLOWJACKET LN STE 130
ROCKWALL, TX, 75087 - 4845Primary Contact Charisa Hauser Primary Contact Phone (972) 204-7600 Primary Contact Email chauser@rockwallcountytexas.com Office Hours M-F 8am-12pm, 1-5pm Fax (972) 204-7609 Status Current Research
Council Fee
Account
Number620161 Current Order
(Click to download)620161.pdf Who Enforces OSSF in Each County
County Enforcing Authority / Department Role & Notes Collin County Collin County Development Services / Engineering – OSSF program They issue permits, inspect systems, enforce rules in unincorporated areas, handle complaints and spot checks. Collin County Hunt County Hunt County Health Department / Environmental Officers They manage permit applications, inspections, maintenance oversight, and enforcement of septic / aerobic systems in Hunt County. huntcounty.net Rockwall County Rockwall County Environmental Health Coordinator / County Environmental Health They perform OSSF permitting, inspections, and enforce Texas Health & Safety codes and local ordinances. rockwallcountytexas.com 📜 Legal & Regulatory Backing & Process
1. Permits & Authority
2. Design & Installation Standards
3. Electrical & Utilities
4. Affidavits, Documentation & Records
5. Maintenance & Reporting (for alternative / aerobic systems)
6. Alterations, Repairs & Upgrades
General (State / TCEQ) OSSF Responsibilities
Considerations For Caddo Mill
Authorized Agent CITY OF CADDO MILLS AUTHORIZED AGENT Permit Office
Location2701 Johnson St
Greenville, TX, 75401Web Address https://www.huntcounty.net/page/hunt.septic Area Served administered by Hunt County Mailing Address 2700 JOHNSON ST
GREENVILLE, TX, 75401 - 4240Primary Contact Brittnay Cooper Primary Contact Phone (903) 408-4140 Primary Contact Email bcooper@huntcounty.net Office Hours M-F 8am-5pm Fax (903) 454-3721 Status Current Research
Council Fee
Account
Number620388 Current Order
(Click to download)620388.pdf
Who Enforces OSSF in Each County
County Enforcing Authority / Department Role & Notes Collin County Collin County Development Services / Engineering – OSSF program They issue permits, inspect systems, enforce rules in unincorporated areas, handle complaints and spot checks. Collin County Hunt County Hunt County Health Department / Environmental Officers They manage permit applications, inspections, maintenance oversight, and enforcement of septic / aerobic systems in Hunt County. huntcounty.net Rockwall County Rockwall County Environmental Health Coordinator / County Environmental Health They perform OSSF permitting, inspections, and enforce Texas Health & Safety codes and local ordinances. rockwallcountytexas.com 📜 Legal & Regulatory Backing & Process
1. Permits & Authority
2. Design & Installation Standards
3. Electrical & Utilities
4. Affidavits, Documentation & Records
5. Maintenance & Reporting (for alternative / aerobic systems)
6. Alterations, Repairs & Upgrades
General (State / TCEQ) OSSF Responsibilities
Considerations For Collin County
Key Regulatory & Permitting Considerations
IF YOU ARE BUILDING A NEW STRUCTURE THAT WILL CONNECT TO A NEW OSSF, THEN APPLY FOR YOUR DEVELOPMENT PERMIT FIRST AND STAFF WILL THEN SEND AN ASSOCIATED OSSF PERMIT THROUGH YOUR PORTAL TO BE COMPLETED BY YOU. DO NOT APPLY FOR A SEPARATE DEVELOPMENT PERMIT AND OSSF PERMIT.
If Collin County is your permitting authority and you are adding a new structure, altering an existing structure or building a swimming pool on a property with an existing OSSF, you are required to apply for a Review of Existing OSSF for New Construction/Improvement permit through the Collin County Citizen Self-Service Portal.
(1) Change of Ownership & (2) Aerobic Wastewater Homeowner's Information sheet, and
(3) Maintenance contract in new owner's name (must be obtained from your licensed maintenance provider).
Submit the forms through our OSSF Report Portal.
Whether or not an OSSF can be designed and installed, meeting all current State and County OSSF regulations, for that specific lot cannot be determined until you hire a 3rd party Registered Sanitarian or Professional Engineer to evaluate the site and design a system.
If the property was made smaller than the required acreage after the aforementioned dates, the property is ineligible for an OSSF. PLEASE NOTE THAT PROPERTIES AFFECTED BY A GOVERNMENT TAKING (FOR A ROADWAY, ETC.) MAY STILL BE ELIGIBLE FOR AN OSSF. CONTACT developmentservices@co.collin.tx.us WITH PROOF OF THE GOVERNMENT TAKING FOR REVIEW.Authorized Agent COLLIN COUNTY AUTHORIZED AGENT Permit Office
Location4690 Community Ave, Ste 200
MCKINNEY , TX, 75071Web Address https://www.collincountytx.gov/Services/Engineering/Development-Services/on-site-sewage-facilities Area Served entire County except Cities of Dallas & Murphy, and other AAs: Fairview, Farmersville, Frisco, Nevada, Royse City Mailing Address 825 N MCDONALD ST STE 170
MCKINNEY, TX, 75069 - 2175Primary Contact MISTY BROWN Primary Contact Phone (972) 548-5585 Primary Contact Email MBROWN@CO.COLLIN.TX.US Office Hours M-F 7:30am-4:00pm Fax (972) 548-5555 Status Current Research
Council Fee
Account
Number620046 Current Order
(Click to download)620046.pdf Who Enforces OSSF in Each County
County Enforcing Authority / Department Role & Notes Collin County Collin County Development Services / Engineering – OSSF program They issue permits, inspect systems, enforce rules in unincorporated areas, handle complaints and spot checks. Collin County Hunt County Hunt County Health Department / Environmental Officers They manage permit applications, inspections, maintenance oversight, and enforcement of septic / aerobic systems in Hunt County. huntcounty.net Rockwall County Rockwall County Environmental Health Coordinator / County Environmental Health They perform OSSF permitting, inspections, and enforce Texas Health & Safety codes and local ordinances. rockwallcountytexas.com 📜 Legal & Regulatory Backing & Process
General (State / TCEQ) OSSF Responsibilities
1. Which Permitting Authority Applies
2. Review of Existing OSSF when making improvements
3. Lot Size / Minimum Acreage Requirements
4. Standards Beyond State Minimums
5. License to Operate / Final Inspection
6. Maintenance, Reporting & Chlorination (for aerobic systems or alternative systems)
7. No Unauthorized Alterations
Considerations For McLendon-Chisholm
Who Enforces OSSF in Each County
County Enforcing Authority / Department Role & Notes Collin County Collin County Development Services / Engineering – OSSF program They issue permits, inspect systems, enforce rules in unincorporated areas, handle complaints and spot checks. Collin County Hunt County Hunt County Health Department / Environmental Officers They manage permit applications, inspections, maintenance oversight, and enforcement of septic / aerobic systems in Hunt County. huntcounty.net Rockwall County Rockwall County Environmental Health Coordinator / County Environmental Health They perform OSSF permitting, inspections, and enforce Texas Health & Safety codes and local ordinances. rockwallcountytexas.com 📜 Legal & Regulatory Backing & Process
General (State / TCEQ) OSSF Responsibilities
Considerations For Frisco
Authorized Agent CITY OF FRISCO AUTHORIZED AGENT Permit Office
Location6101 FRISCO SQUARE BLVD 3RD FLOOR
FRISCO , TX, 75034Web Address https://www.friscotexas.gov/395/Building-Inspections Area Served City limits Mailing Address 6101 FRISCO SQUARE BLVD FL 3
FRISCO, TX, 75034 - 3253Primary Contact GILBERT URVINA Primary Contact Phone (972) 292-5301 Primary Contact Email gurvina@friscotexas.gov Office Hours M-F 8am-5pm Fax (972) 292-5313 Status Current Research
Council Fee
Account
Number620262 Current Order
(Click to download)620262.pdf Authorized Agent CITY OF FRISCO AUTHORIZED AGENT Permit Office
Location6101 FRISCO SQUARE BLVD 3RD FLOOR
FRISCO , TX, 75034Web Address https://www.friscotexas.gov/395/Building-Inspections Area Served City limits Mailing Address 6101 FRISCO SQUARE BLVD FL 3
FRISCO, TX, 75034 - 3253Primary Contact GILBERT URVINA Primary Contact Phone (972) 292-5301 Primary Contact Email gurvina@friscotexas.gov Office Hours M-F 8am-5pm Fax (972) 292-5313 Status Current Research
Council Fee
Account
Number620262 Current Order
(Click to download)620262.pdf Who Enforces OSSF in Each County
County Enforcing Authority / Department Role & Notes Collin County Collin County Development Services / Engineering – OSSF program They issue permits, inspect systems, enforce rules in unincorporated areas, handle complaints and spot checks. Collin County Hunt County Hunt County Health Department / Environmental Officers They manage permit applications, inspections, maintenance oversight, and enforcement of septic / aerobic systems in Hunt County. huntcounty.net Rockwall County Rockwall County Environmental Health Coordinator / County Environmental Health They perform OSSF permitting, inspections, and enforce Texas Health & Safety codes and local ordinances. rockwallcountytexas.com 📜 Legal & Regulatory Backing & Process
General (State / TCEQ) OSSF Responsibilities
Considerations For Hunt County
Authorized Agent HUNT COUNTY AUTHORIZED AGENT Permit Office
Location2700 JOHNSON ST
GREENVILLE , TX, 75401Web Address https://www.huntcounty.net/page/hunt.septic Area Served unincorporated County + Town of Poetry ONLY, except w/in 2,000 ft from Lake Tawakoni - see Sabine River Authority Mailing Address 2700 JOHNSON ST
GREENVILLE, TX, 75401 - 4240Primary Contact BRITTNAY COOPER Primary Contact Phone (903) 408-4140 Primary Contact Email BCOOPER@HUNTCOUNTY.NET Office Hours M-F 8am-5pm Fax (903) 454-3721 Status Current Research
Council Fee
Account
Number620107 Current Order
(Click to download)620107.pdf
Who Enforces OSSF in Each County
County Enforcing Authority / Department Role & Notes Collin County Collin County Development Services / Engineering – OSSF program They issue permits, inspect systems, enforce rules in unincorporated areas, handle complaints and spot checks. Collin County Hunt County Hunt County Health Department / Environmental Officers They manage permit applications, inspections, maintenance oversight, and enforcement of septic / aerobic systems in Hunt County. huntcounty.net Rockwall County Rockwall County Environmental Health Coordinator / County Environmental Health They perform OSSF permitting, inspections, and enforce Texas Health & Safety codes and local ordinances. rockwallcountytexas.com 📜 Legal & Regulatory Backing & Process
1. Permits & Authority
2. Design & Installation Standards
3. Electrical & Utilities
4. Affidavits, Documentation & Records
5. Maintenance & Reporting (for alternative / aerobic systems)
6. Alterations, Repairs & Upgrades
General (State / TCEQ) OSSF Responsibilities
Considerations For Rockwall County
Authorized Agent ROCKWALL COUNTY AUTHORIZED AGENT Permit Office
Location1101 E Yellowjacket Ln STE 130
ROCKWALL , TX, 75087Web Address https://www.rockwallcountytexas.com/245/Environmental-Health-Coordinator Area Served City of Rockwall, City of Royse City (AA), unincorporated Rockwall County Mailing Address 1101 E YELLOWJACKET LN STE 130
ROCKWALL, TX, 75087 - 4845Primary Contact Charisa Hauser Primary Contact Phone (972) 204-7600 Primary Contact Email chauser@rockwallcountytexas.com Office Hours M-F 8am-12pm, 1-5pm Fax (972) 204-7609 Status Current Research
Council Fee
Account
Number620161 Current Order
(Click to download)620161.pdf Who Enforces OSSF in Each County
County Enforcing Authority / Department Role & Notes Collin County Collin County Development Services / Engineering – OSSF program They issue permits, inspect systems, enforce rules in unincorporated areas, handle complaints and spot checks. Collin County Hunt County Hunt County Health Department / Environmental Officers They manage permit applications, inspections, maintenance oversight, and enforcement of septic / aerobic systems in Hunt County. huntcounty.net Rockwall County Rockwall County Environmental Health Coordinator / County Environmental Health They perform OSSF permitting, inspections, and enforce Texas Health & Safety codes and local ordinances. rockwallcountytexas.com 📜 Legal & Regulatory Backing & Process
General (State / TCEQ) OSSF Responsibilities
Jurisdiction & Permitting
📐 Land / Lot Requirements & System Design
🛠️ Repairs, Alterations & Modifications
✅ Inspections, Maintenance & Enforcement
