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Septic inspectors, installers and maintenance providers in Collin County, TX

Independent directory. Names, license types and numbers come from the TCEQ licensing database (current OSSF licenses, downloaded Oct 28, 2026). The county is the one on each license holder's TCEQ record, not necessarily where they work. Phone numbers and cities appear only when the license holder authorized TCEQ to release business contact information. Verify the license with TCEQ before hiring.

45 TCEQ OSSF license holders list Collin County on their license record (22 Installer IIs, 20 Maintenance Providers, 14 Designated Representatives, 9 Site Evaluators, 5 Installer Is). 2 released a business phone number to TCEQ. This directory serves Collin County; no listing here means a business has an office in the county.

Who inspects septic systems in Collin County?

Septic permits and installation inspections in Collin County are handled by the local authorized agent. TCEQ's 2024 authorized-agent report lists these agents reporting in Collin County (some cover only a city or a lake area):

• City Of Farmersville (TCEQ AR no. 620279)
• City Of Frisco (TCEQ AR no. 620262)
• City Of Lavon (TCEQ AR no. 620315)
• City Of Lucas (TCEQ AR no. 620047)
• City Of Nevada (TCEQ AR no. 620350)
• City Of Royse City (TCEQ AR no. 620337)
• Collin County (TCEQ AR no. 620046)
• Town Of Fairview (TCEQ AR no. 620278)

Find which one covers your address, plus phone numbers, with the TCEQ local contact search.

License holders

Source: TCEQ Licensing & Registration database, group search for On-Site Sewage Facility licenses (current status), and the TCEQ License Holder Spreadsheet for released contact details. Last checked Oct 28, 2026. Apprentices and maintenance technicians are not listed because they work under a licensed installer or maintenance provider.

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