Who maintains an aerobic septic system in Texas, and what does the contract cover?

What the maintenance contract has to cover

TCEQ's maintenance page says the contract must be with a licensed maintenance provider. At a minimum the provider tags the system when the contract starts, punches or marks the tag at every visit, including visits that answer an owner's complaint, inspects each component and tests the system as 30 TAC 285.91(4) requires. Reports go to the permitting authority and to you at least once every four months, or every six with electronic monitoring or automatic alerts, each within 14 days of the test. The contract must also name the individual who does the work. Look for that name, the complaint response time, the covered items, the maintenance and testing schedule, and who maintains the disinfection unit.

An installed aerobic system in Texas: our range and three company prices

Our model gives an installed aerobic system $8,500 to $37,300 installed, an estimate, not a quote. Three Texas companies publish an installed price, short of the five that would set a range on their own, so their lowest and highest prices are folded into the national estimate.

The county permit isn't in that range. Williamson County's schedule, updated 9/12/25, lists $710 for a residential aerobic unit with routine maintenance required, and Tarrant County requires a notarized OSSF Affidavit recorded with the County Clerk for a new aerobic system.

Estimated range, not a quote: $8,500 to $37,300 installed. Built from one national published range, adjusted by the Texas operating engineer wage ratio (0.81), then widened to take in the lowest and highest of the three Texas company prices for this job ($8,500 to $15,000). Eight Texas septic companies publish a price we could count on their own websites; where five or more price the same job, the range is the middle half of their prices, and where two to four do, the estimate is widened to take them in. Coupons, specials and figures a page gives as an average are not counted. Basis: small sample (3), national estimate joined with the company range.

Estimated range. Built from national published ranges (1 source), adjusted by Texas's operating engineer wage ratio to the US (0.81, BLS May 2025). Not a quote. Eight Texas septic companies publish a price we could count on their own websites; where five or more price the same job, the range is the middle half of their prices, and where two to four do, the estimate is widened to take them in. Coupons, specials and figures a page gives as an average are not counted. Only three Texas companies publish a price we could count for this job, too few for a range of their own, so the range is our national estimate widened to take in their lowest and highest prices. Full method. Prices as of Oct 23, 2026.

When you can take over the maintenance yourself

TCEQ's maintenance page says homeowners can perform maintenance two years after the initial installation of an aerobic treatment unit, for systems that use secondary treatment, non-standard treatment, drip irrigation or surface application disposal. Counties write their own versions. Hays wants a two-year initial maintenance contract filed with the permit application, and Jefferson requires an initial two-year contract with renewals 30 days before each one expires. Galveston's health district lets homeowners maintain their own system after the initial two-year service agreement, and it lists the 8-hour aerobic courses, or the Class D Wastewater Operator license, it accepts. McLennan requires an ongoing contract once the two-year warranty ends.

Which TCEQ license to ask for

Installer II covers all types of system, aerobic units included, so ask an installer which class it holds. Servicing is a separate license. A Maintenance Provider needs a current Installer II license, a Class C or higher Wastewater Operator license, or three years as a registered maintenance technician. The provider then completes the Basic Maintenance Provider course, an Advanced Aerobic System course and the exam, and the application costs $111. Anyone who makes the visits under that provider has to be a registered maintenance technician working under direct supervision.

Aerobic alarms that can't wait for the next service visit

Before you sign a maintenance contract

1. Ask the permitting office whether your permit or its order requires a maintenance contract.
2. Get the provider's TCEQ license number and the name of the person who'll make the visits.
3. Check that the contract lists the reporting schedule and the complaint response time.
4. Ask whether your county lets owners maintain the system after two years, and what training it wants.

Who approves an aerobic system, and what the texts say about contracts

The permit comes from the county or other authorized agent, and TCEQ says local programs may be stricter than the state minimum. A 2017 copy of Health and Safety Code 366.0515 says an authorized agent may not condition a permit for a single-family aerobic system on the owner contracting for maintenance. The same copy says the owner must maintain the system directly or through a maintenance contract. TCEQ's maintenance page says the contract must be with a licensed maintenance provider, and that some permitting authorities have adopted more stringent requirements. Ask your county office what its own order requires.

Questions people ask

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