Sanitation (On-Site Sewage Facilities) Department

This office assists the citizens in providing for the health, safety, and welfare of Gillespie County residents and the environment. Gillespie County is dedicated to the safety and welfare of all property owners. The completion of all permit applications ensures that regulations set forth by the governing entities are in compliance with all standards. Property owner or assigned designated agent can obtain all required applications.

Documents

  1. Affidavit to the Public Form (PDF)
  2. Application for On-Site Sewage Facility (OSSF) Permit (PDF)
  3. Area Maintenance Providers List (PDF)
  4. Gillespie County Installers List (PDF)
  5. Gillespie County On-Site Sewage Facility Fees Effective October 14, 2025 (PDF)
  6. Gillespie County Development Requirement Information Brochure (PDF)
  7. Order Adopting Rules of Gillespie County, Texas for On-Site Sewage Facilities Effective October 14, 2025 (PDF)

For your convenience, we offer the following information link from TCEQ:


Additional Information

For information about Subdivisions of Land, Manufactured Home Rental Communities, or Right-of-Way Permits, please contact County Engineer Melissa Eckert at 830-307-6196 or visit the Engineering Department page

Effective August 1, 2025,  all Floodplain determinations will be conducted by the County Engineer's Office and the Development Permit Determination and Site Plan with Narrative forms must be submitted to that office PRIOR to submitting septic applications to the OSSF Office.  These forms take the place of the "Development Permits" previously submitted.  Please keep in mind that this form is a requirement for septic permit approval and your septic application will not be considered complete until the Development Permit Determination has been signed by the County Engineer's Office and a copy provided to the OSSF Office. 

For information about Water Wells: please Contact the Hill Country Underground Water Conservation District (HCUWCD):

Phone 830-997-4472
Hill County Underground Water Conservation District Website