In Texas, most on-site sewage facilities (OSSFs), including aerobic treatment units, are regulated through the Texas Commission on Environmental Quality (TCEQ) and local permitting authorities. A maintenance contract is one of the ways an owner keeps the system operating and documented. This article explains what such a contract typically covers. It does not give prices.
Why a service contract exists
An aerobic treatment unit has mechanical and electrical parts, such as an aerator, a pump, alarms, and in many cases a spray irrigation system. These parts need routine checks, and the provider reports the results to the owner and to the permitting authority.
What the contract should cover
The TCEQ maintenance guidance describes what a maintenance contract should address. Confirm the current wording with TCEQ or your local authority before relying on it. Such a contract typically:
- list the items and components the contract covers;
- state how quickly the provider will visit after the owner reports a problem;
- name the responsible maintenance provider;
- state how often routine maintenance and testing will take place;
- say who maintains the disinfection unit, if the system has one;
- give the provider’s business address and telephone number.
Filing and renewal
According to TCEQ guidance, the maintenance contract is submitted to the permitting authority, and the initial service period is described as two years. Renewal and replacement terms vary by county and permitting authority, so ask your local office what applies to your property.
Reporting by the provider
Maintenance reports go to the permitting authority and the owner on the schedule described in TCEQ guidance. Ask the provider what reports they will send, how often, and how you will receive copies.
Questions to ask before you sign
- Which components are covered, and which are excluded?
- How soon will you come out after I call about a problem?
- Who is the responsible maintenance provider, and is that person licensed?
- What is the inspection and maintenance schedule?
- Who pays for parts, such as pumps or aerator components?
- What happens if you stop servicing the area or I cancel?
- Will you file the contract and reports with the permitting authority?
Costs
This article does not list contract prices. Costs vary by system type, location, and provider. For a current figure, consult your service provider or your local authority.
Sources
- TCEQ, Maintenance of On-Site Sewage Facilities (Septic Systems)
- TCEQ, On-Site Sewage Facility Rules Compilation (RG-472)
General information only. This article does not replace advice from a licensed provider, a registered professional, or your local permitting authority.
Last reviewed: 3 November 2026.