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OSSF Program

  Departments   >   Infrastructure   >   County Engineer/Road and Bridge   >   Environmental   >   OSSF Program
Williamson County Holds Virtual Public Meeting on Proposed Adoption of OSSF Rules
Williamson County is proposing the adoption of amended rules for on-site sewage facilities (OSSF) in Williamson County, Texas. A virtual meeting is available from Wednesday, December 9, 2020, at 5 p.m. through Wednesday, December 23, at 5 p.m. For the virtual public meeting, project staff have created a pre-recorded presentation with both audio and visual components. Click here to view the presentation in PowerPoint with audio. Click here to view it as a pdf.
The public is invited to make comments on the proposed rules. All comments must be received on or before Wednesday, December 23, 2020, at 5 p.m.

Written comments from the public may be submitted by email to publicinformation@wilco.org or by mail to:

               Williamson County Public Information Office
               710 S. Main Street, Suite 101
               Georgetown, TX 78626
Verbal comments may be submitted by leaving a voicemail at 512-943-1195. Responses to comments received will be available online at www.wilco.org/OSSF once they have been prepared.
If you do not have internet access, you may call 512-943-3330 between the hours of 8 a.m. and 5 p.m., Monday through Friday, to ask questions and access materials.  If you have any general questions or concerns regarding the virtual meeting, please contact the Williamson County Public Information Office at 512-943-1195 or publicinformation@wilco.org.
The Commissioners Court will consider adoption of the first amended rules of Williamson County, Texas for On-Site Sewage Facilities at a future meeting date in 2021.
 
Services We Provide

As of October 2nd, 2017, the On-Site Sewage Facility office has relocated to the Williamson County Engineer/Road and Bridge Division

By combining development services, we hope to be a one-stop for our customers' convenience. Please note the new phone number: 512.943.3330, and address at: 3151 S. E. Inner Loop, Suite B, Georgetown, TX 78626. Office hours will remain the same from 8:00 a.m. – 5:00 p.m, Monday through Friday.

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 system records information requests, permitting and fee process inquiries, technical inquiries on types of systems and regulatory compliance questions

Regulatory Authority

  • 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

 
OSSF Open Records Requests

Open Records Requests can be submitted via email to ossf@wilco.org. Or visit our office and submit a completed Open Records Request form to the front desk.

Emailed Open Records Requests must include:

  • Requester's full name, email address, and phone number
  • Full property address
  • Description of information being requested
  • Include property legal information if known (ex. Subdivision Name, Block, Lot)
 
How to Apply for a Permit

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:

 
Does My Property Require an On-Site Sewage Facility

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.