Aerobic Septic Questions, Answered — Montgomery County TX

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Common questions about aerobic septic systems in Montgomery County

Aerobic treatment units are a different animal from a traditional gravity septic system — they have moving parts, a legal maintenance requirement, and a few quirks that catch new owners off guard. Below are the questions we hear most from homeowners around Conroe, Lake Conroe, Willis, Montgomery, Magnolia and the FM 1488 corridor. If you don't see your question here, give us a call and we'll walk you through it.

Is a maintenance contract legally required for my aerobic septic system in Texas?

Yes. Under Texas Health & Safety Code §366.0515 and 30 TAC §285.7, every aerobic treatment unit (ATU) in Texas must be covered by a maintenance contract with a TCEQ-licensed maintenance provider. The provider must inspect your system and file a report at least once every four months — three times a year — with your permitting authority (Montgomery County Environmental Health) and with you. This isn't optional or a local suggestion; it's state law that applies to every aerobic system in the county.

How often does my aerobic septic system need to be inspected?

At minimum, three times a year — once every four months — under the standard TCEQ schedule. See our septic inspections page for what each visit covers. That frequency can be reduced to twice a year only if your system has an approved electronic remote monitoring device that continuously reports its status. Without approved remote monitoring, three inspections a year is the requirement, and each one has to be documented in a report sent to Montgomery County Environmental Health and to you as the homeowner.

How much does a septic maintenance contract cost?

Maintenance contracts for aerobic systems in Montgomery County typically run $200–$500 per year, depending on your system's size, age and how far it is from your provider's service area. See our pricing page for a fuller breakdown. That fee covers your required inspections and the compliance reports filed with the county. Repairs — like a failed aerator, pump or control panel — are usually billed separately unless your contract specifically bundles parts and labor.

Can I maintain my own aerobic septic system instead of hiring a provider?

In limited cases, yes — Texas allows a homeowner to maintain their own aerobic system, but only after completing a TCEQ-approved maintenance training course, and county-level rules on owner-maintained systems can vary. Even where it's allowed, you're still on the hook for the same inspection frequency and reporting requirements a licensed provider would handle. Because the paperwork, deadlines and technical checks are unforgiving, most homeowners around Conroe and Lake Conroe find it's simpler and more reliable to keep a licensed provider on contract rather than take on that liability themselves.

What happens if I don't have a current maintenance contract?

Your system falls out of compliance, and Montgomery County Environmental Health can — and does — send violation notices to homeowners whose aerobic systems don't have an active, reporting maintenance contract on file. See our violation notice help page if you've already received one. This comes up most often after the builder's initial contract (often two years) expires and isn't renewed. The fastest fix is getting a new contract in place with a licensed provider so inspections and reports resume.

How long do aerobic septic systems typically last?

With consistent maintenance, an aerobic system's tank and drain field can last decades, but the mechanical components wear out much sooner. Aerators, effluent pumps, floats and control panels are the parts that fail first, usually somewhere in the 5–10 year range depending on use and water quality, and each is repairable or replaceable individually — see aerobic septic repair. A full system replacement — needed only if the tank itself fails or the system is beyond economical repair — typically runs $12,000–$20,000, which is exactly why staying current on inspections to catch small problems early matters.

Why is my septic alarm going off?

The alarm is your control panel telling you something in the system isn't working the way it should — commonly a tripped float switch, a failed aerator or effluent pump, a clogged sprinkler head, or high water level in the tank. It's not something to ignore or silence and forget; an alarm usually means the system has stopped treating wastewater correctly. Call your maintenance provider promptly so they can diagnose which component tripped it.

Does my aerobic system need chlorine tablets, and which kind?

Most aerobic systems disinfect the treated effluent before it's sprayed on your yard, and that's typically done with calcium hypochlorite tablets made specifically for septic/wastewater use — not standard swimming pool chlorine (like trichlor or dichlor tablets). Using pool chemicals in a septic chlorinator is a real safety and system-damage risk: they're formulated differently, can react badly with system components, and aren't approved for wastewater disinfection. Your maintenance provider checks and refills the chlorinator with the correct tablets as part of routine service.

I'm buying or selling a home with an aerobic septic system — what do I need to know?

Find out whether there's an active maintenance contract and ask for the most recent inspection reports before closing. Our new homeowner page walks through the details. A lapsed contract or a system flagged with issues can turn into a post-closing headache for a new owner who wasn't expecting it. As the buyer, plan to either transfer the existing contract into your name or set up a new one with a licensed provider right away — the county requires continuous coverage, and there's no grace period tied to a change of ownership.

How do I switch septic maintenance providers?

Switching is usually a single phone call. A new TCEQ-licensed provider takes over your contract, picks up the inspection schedule, and notifies Montgomery County Environmental Health that they're now the maintenance provider of record for your system. You don't need to wait for your current contract to expire, and there's no requirement to stay with your original installer's provider — plenty of homeowners switch because of missed visits, unclear pricing, or slow response on repairs.

Serving all of Montgomery County

We answer these same questions every week for homeowners throughout Conroe, Willis, Magnolia, Montgomery, Pinehurst and Dobbin. Whatever your aerobic system needs — a new contract, a repair, or help with a violation notice — call us for a free quote.