Washington County, TX septic permits and regulations
Septic systems in Washington County, Texas are permitted by Washington County (AA: Mark Marzahn) under 30 TAC Chapter 285.
Septic permit program
- Program type: County Program
- Authorized agent: Mark Marzahn (Environmental Health Director)
- Own septic program: Yes
- Local rules beyond the state: No
- Population: 35,805
Permit fee comparison
Average septic permit fee in Washington County: $200. Texas average: $285.
Local rules
All septic systems require a permit, regardless of acreage or who performs the work. Aerobic ATU systems are NOT required by Washington County. Address: 105 West Main Street, Suite 100, Brenham, TX 77833. Fax: 979-277-6291. Minimum lot size varies by subdivision date and water supply type.
What SepticPro has on file for Washington County
- 2 permit fees with sources
- The agency phone, email and office address
- Setback distances
- Soil and perc test requirements
- Allowed system types
- System design rules
- Inspection requirements
- Maintenance and pumping rules
- Point-of-sale rules
- Installer, designer and pumper licensing
Create a free account to see the full details.
Draw a permit-ready site plan for Washington County
Enter the address, draw the system on the aerial with the parcel lines and topo, and print it to scale for Washington County (AA: Mark Marzahn). See how SepticPro site plans work.
Other Texas counties
- Anderson County
- Andrews County
- Angelina County
- Aransas County
- Archer County
- Armstrong County
- Atascosa County
- Austin County
- Bailey County
- Bandera County
- Bastrop County
- Baylor County
- Bee County
- Bell County
- Bexar County
- Blanco County
- Borden County
- Bosque County
- Bowie County
- Brazoria County
- Brazos County
- Brewster County
- Briscoe County
- Brooks County
Data checked 2026-03-16. Always confirm requirements with Washington County (AA: Mark Marzahn) before applying.