Understanding OSSF Regulations in Harris County
If you own property with a septic system in unincorporated Harris County — including Huffman, Crosby, Atascocita, Highlands, and dozens of other communities — your system is classified as an On-Site Sewage Facility (OSSF). These systems are regulated by the Texas Commission on Environmental Quality (TCEQ) under 30 TAC Chapter 285, with Harris County's Watershed Protection Division serving as the local authorized agent for permitting and enforcement.
This guide translates the regulatory requirements into plain English so you know exactly what's required of you as a property owner.
Aerobic System Requirements (Mandatory)
If your property has an aerobic treatment system — the type with an electric aerator, spray heads, and a control panel — you have legally mandated maintenance obligations:
- Maintenance contract required: You must maintain a current contract with a TCEQ-licensed maintenance provider at all times
- Quarterly inspections: Harris County requires your licensed provider to inspect the system four times per year (every three months). The TCEQ state minimum is every four months, but Harris County has adopted the more stringent quarterly requirement
- County reporting within 14 days: After each inspection, your provider must file a written report with Harris County's permitting authority within 14 days
- System must remain operational: All components — aerator, pumps, disinfection, spray heads — must be functional. A non-operational system is a compliance violation
Failure to maintain a current maintenance contract or keep the system operational can result in enforcement action from Harris County, including fines and required remediation.
Conventional System Requirements
Conventional septic systems (tank and drainfield, no electrical components) have fewer mandatory requirements, but responsible maintenance is still important:
- No mandatory maintenance contract — but TCEQ strongly recommends annual professional inspections
- Pump every 3–5 years to prevent solids from reaching the drainfield
- Permits required for any alterations — you cannot modify, extend, or repair the system without a permit from Harris County
- Homeowner maintenance is limited — only the homeowner can perform maintenance on their own single-family residence, and only for specific system types
When You Need a Permit
A permit from Harris County is required to:
- Install a new septic system
- Replace an existing system
- Repair a system (except emergency repairs, which must be reported within 72 hours)
- Alter or extend a system
- Connect additional structures to an existing system
The only exception is the "10-acre rule" — properties of 10 acres or more with a single-family dwelling, where the OSSF is at least 100 feet from all property lines, may be exempt from permitting requirements. However, the system must still comply with all construction and design standards.
Real Estate Transaction Requirements
If you're buying or selling a property with an OSSF in Harris County:
- Mortgage companies frequently require an OSSF evaluation before closing
- TCEQ does not mandate inspections for property transfers, but your lender likely will
- The permit for the OSSF transfers automatically to the new owner upon sale
- New owners should notify Harris County that they are the new owner and ask about proper startup procedures
Harris County Septic provides real estate transaction inspections with lender-friendly reports. Contact us to schedule an inspection before your closing date.
Complaint and Enforcement Process
If a neighbor or the county identifies a problem with your OSSF:
- Harris County's designated representative will investigate
- If problems are found, you typically have 30 days to make substantial progress on a remedy
- After 30 days, the county can file a criminal complaint with the local justice of the peace
- Discharging effluent into or adjacent to waters of the state is prohibited
How to Stay Compliant
The simplest path to compliance is to maintain a current maintenance contract with a TCEQ-licensed provider. Our maintenance contracts handle everything: scheduled inspections, all county reporting, component testing, and compliance documentation. Conventional system contracts start at $199/year. Aerobic system contracts start at $375/year (2-year: $675, 3-year: $975) and include all four required quarterly inspections plus county reporting.