Williamson County's On-Site Sewage Facilities (OSSF) regulates On-Site Sewage Facilities (a.k.a. septic tanks) located within Williamson County, with the exception of those areas that are located within the City of Austin.
- Permitting: Process permit applications and related fees for new and/or existing on-site sewage system
- Inspections: Perform inspections as part of the permitting or complaint investigation processes
- Complaint Investigation: Investigate exposed sewage and general public complaints related to OSSFs. Inherent to this activity are legal notices of violation and/or potential court action(s)
- Program Information: Address general customer inquiries, including records information requests, permitting and fee process inquiries, technical inquiries on types of systems, and regulatory compliance questions
- Williamson County Engineer's Office has been authorized by the Texas Commission on Environmental Quality to administer the On-site Sewage Facilities (OSSF) Program. The program falls primarily under the authority of TCEQ rules contained within 30 TAC Ch.285 On-Site Sewage Facilities
- OSSF's installed and operated within Williamson County's jurisdiction must follow the requirement established in the Williamson County Engineer's On-Site Sewage Facility Rules