Williamson County, septic, sewage
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.
Open Records Requests can be submitted via email to firstname.lastname@example.org. Or visit our office and submit a completed Open Records Request form to the front desk.
Emailed Open Records Requests must include:
In an effort to provide better communication, document management and project tracking, Williamson County is now accepting OSSF applications through www.mygovernmentonline.org. Our office is no longer accepting email or paper applications.
An application is required to modify an existing (i.e. repair or enlarge), or to install a new OSSF. Please select from a category below for more information:
Visit the County Address Search and enter the property address. If the City listed is "Unincorporated" or an ETJ is listed, it is likely that an OSSF is required. Call 512.943.3330 to verify.