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Aerobic Septic Maintenance Contracts in Texas
If you own an aerobic septic system in Comal County, you are legally required to have a maintenance contract. Plenty of homeowners find this out at the worst possible moment — during a sale, or when a county notice arrives. Here is exactly what the law asks of you.
Under Texas Health & Safety Code 366.0515, every aerobic system owner must maintain an active contract with a TCEQ-licensed maintenance provider. The provider must inspect the system three times a year — every four months — and file a report with the county within 14 days of each visit. Contracts run $200 to $500 a year. Non-compliance can draw fines of up to $100 per day.
Why the law exists
An aerobic system is a small wastewater treatment plant with moving parts: a compressor, a pump, floats, timers, and a disinfection stage. When any of those fail, the system does not stop — it keeps discharging, just without treating properly. On a Comal County lot, that effluent is often being sprayed onto the surface of your yard, above limestone that drains toward the aquifer. The inspection schedule exists because a failure that nobody notices is the dangerous case.
What the provider checks each visit
- Mechanical components — compressor or aerator, pumps, floats, timers, control panel
- Effluent quality — whether treatment is actually working
- Disinfection levels — chlorine residual, or the UV unit's function
- Spray head operation — coverage, clogging, breakage, and whether the field is being dosed correctly
Each visit produces a report that goes to the county within 14 days. Those filings are how the county knows your system is being maintained — which is why "I service it myself" does not satisfy the requirement.
Three visits a year, or two
The default is three inspections annually. If your system has electronic monitoring that tracks failures and disinfection levels, the requirement drops to every six months. Over the life of a system, that difference adds up, and the monitoring premium is modest against it. If you are specifying a new install, price the panel both ways.
| System | Required inspections | Interval |
|---|---|---|
| Aerobic, standard control panel | 3 / year | Every 4 months |
| Aerobic, with electronic monitoring | 2 / year | Every 6 months |
| Conventional (gravity drainfield) | No contract required | Pump periodically |
What it costs, and what it is worth
Contracts run $200 to $500 a year, with some providers quoting $400 to $600 annually after the first year. The first year is typically included with the installation, which is why the renewal invoice catches people by surprise.
Set against that: a failed pump caught on a scheduled visit is a repair. The same failure caught six months late can mean a saturated spray field, a contaminated yard, and a replacement bill in the thousands. The contract is cheap relative to what it prevents, which is a large part of why the state made it mandatory rather than advisory.
Selling a home with an aerobic system
Texas real estate transactions involving an aerobic system require proof of a valid maintenance contract. In practice that means:
- Keep every inspection report. Buyers and lenders ask for the service history.
- Do not let the contract lapse in the months before listing.
- Expect the buyer's side to verify the system is registered and current with the county.
- A transfer registration may be required so the county's records follow the new owner.
Check immediately whether a contract is in place and in whose name. The obligation runs with ownership of the system, so an expired contract becomes your compliance problem the day you close — and the daily-fine exposure is yours, not the seller's.
Finding a licensed provider
The provider must be TCEQ-licensed for maintenance work. You are free to choose — you are not tied to whoever installed the system — but do not create a gap between one contract ending and the next beginning.
A licensed site evaluator has to answer that with a soil test — nobody can tell from a map. Send us your address and we will have local licensed pros quote the evaluation and the install. Request free quotes →
Maintenance contract questions
Is a maintenance contract legally required in Texas?
Yes, for aerobic systems. Texas Health & Safety Code 366.0515 requires every aerobic system owner to maintain an active contract with a TCEQ-licensed maintenance provider. It is state law, not an optional service plan.
How often does the provider have to come out?
Three times a year — every four months. If your system has electronic monitoring that tracks failures and disinfection levels, that drops to every six months.
What happens if I let the contract lapse?
You are out of compliance, and fines can reach $100 per day. It also becomes a problem at sale: a Texas transfer involving an aerobic system requires proof of a valid maintenance contract.
What does a contract cost?
Typically $200 to $500 a year. Some providers quote $400 to $600 annually once the first year — usually bundled with the installation — has expired.
Do conventional septic systems need a maintenance contract?
No. The contract requirement applies to aerobic systems, because they have mechanical components and disinfection that need regular professional attention. Conventional systems still need periodic pumping.
Can I switch maintenance providers?
Yes. You are not locked to whoever installed the system. Make sure the new provider is TCEQ-licensed and that there is no gap in coverage between contracts, because a gap is a compliance gap.
Official sources
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