All development, on-site sewage facilities (OSSF), food establishments and junkyards in the unincorporated areas of Hays County are required to obtain a permit.

All applications can be found online at www.MyGovernmentOnline.org. Please create an account/log-in to begin the application process.

On-Site Sewage Facility (OSSF) Application

Documents needed:

• On-Site Sewage Facility (OSSF) Application
• Site Plan & Design, Location Map, Floor Plan and Tax Account Summary
• Maintenance Affidavit & Two-Year Initial Maintenance Contract (advanced/aerobic systems only)
• Application Fee(s) (see Fee Schedule)

Application Process: Once your application is received by Hays County Development Services, it will undergo an administrative review. This review may take several business days. Once the administrative review is complete, the application is assigned to an Inspector for a technical review. During the technical review, the Authorization to Construct may be issued. Upon completion of the technical review, the Inspector may issue the Notice of Approval (permit).

Additional Information:

A permit will be required for all On-Site Sewage Facilities, regardless of the size of the lot or acreage onto which it is installed. A permit will not be issued for an On-Site Sewage Facility that is on a tract of land found to be in violation of the Hays County Development (Subdivision) Regulations. Any structure or property used for residential, institutional, or commercial purposes shall be connected to an On-Site Sewage Facility permitted by the Department or a centralized sewage treatment facility permitted by the Texas Commission on Environmental Quality.

An On-Site Sewage Facility Permit can be applied for online or in person at our office. Please visit the Permitting page for more information.

Per the Texas Health and Safety Code, Chapter 366 — Hays County has general authority over the location, design, construction, installation, and proper functioning of on-site sewage disposal systems and shall administer this chapter and the rules adopted under this chapter.

An on-site sewage disposal system—One or more systems that: (A) do not treat or dispose of more than five thousand (5,000) gallons of sewage each day; and (B) are used only for disposal of sewage produced on a site where any part of the system is located. (Texas Administrative Code, Title 30, Chapter 285)

Please reference our Documents & Forms page for copies of the Hays County Rules of On-Site Sewage Facilities (OSSF) and Texas Administrative Code, Title 30, Chapter 285.

Ongoing maintenance is required in Hays County for all aerobic or advanced treatment on-site sewage facility systems.

Below are options to file a complaint about an OSSF:

Call 512-393-2150; Choose option 3 to file a complaint.
Email  septiccomplaints@co.hays.tx.us
http://www.MyGovernmentOnline.org - Click on Solution Center > “Report an Issue”