Maintenance contracts: typically $200–$500 a year

Most Montgomery County homeowners pay somewhere between $200 and $500 per year for a required aerobic treatment unit (ATU) maintenance contract, billed either annually or split across the year. That's a wide range, and there are real reasons a quote can land near the bottom or the top of it:

Number of visits included. Texas law requires inspection and reporting at least every four months — three times a year — unless your system has approved electronic remote monitoring, which can drop the requirement to twice a year. A contract priced for the minimum three visits will usually run lower than one that includes extra service calls.
Whether chlorine or parts are bundled in. Some contracts include disinfection tablets and minor parts (a float, a fuse) in the base price; others bill those separately as consumables run out. Ask specifically what's included versus what's an add-on before you compare two quotes side by side.
System brand and age. Certain aerobic units (Aerobic Septic Systems Inc., Norweco, Delta, Hoot, and others common in Montgomery County subdivisions) have different service intervals and parts availability. Older units nearing the end of their aerator or pump lifespan can carry a slightly higher contract price because the provider is watching them more closely.
Property distance and access. A system out past Dobbin or Plantersville on a long gravel drive may cost a bit more to service than one in a Conroe subdivision, simply due to drive time.
Whether you're renewing or switching providers. Some providers offer a modest discount to lock in a multi-year renewal versus a first-year switch, since onboarding a new customer (pulling permit history, confirming system type) takes a bit more time on the first visit.

The one thing that should not change the price is compliance itself — every licensed provider is filing the same required report to Montgomery County Environmental Health, regardless of what they charge. A cheap contract that skips a scheduled visit or files late puts your compliance status at risk just the same as having no contract at all.

Common repair costs (broad, honest ranges)

Repair pricing depends heavily on the brand of your system, the part that failed, and whether the tank needs to be pumped or opened to reach it. As a general guide for Montgomery County homeowners:

Aerator replacement: commonly runs from the low hundreds up to around $600–$800, depending on the motor/diffuser assembly and system brand.
Effluent pump replacement: similar range, often $300–$700, more if the pump vault needs to be pulled and reset.
Sprinkler head repair or replacement: usually the least expensive fix — often under $150 per head — but multiple failed heads or a broken supply line add up.
Float switch or alarm/control panel repair: a simple float swap can be under $200; a full control panel replacement is a bigger job, often $300–$600.
Chlorinator or disinfection component issues: generally a lower-cost fix, but ignoring it can trigger a compliance flag on your next inspection report.

These are broad ranges, not quotes — the only way to know your actual number is to have someone look at the system. That's what a free quote is for: we tell you what's actually wrong and what it costs before any work is scheduled.

Full system replacement: $12,000–$20,000

When an aerobic system is beyond economical repair — cracked tank, failed treatment components, or a system that's simply reached the end of its service life — full replacement in Montgomery County typically runs $12,000 to $20,000. What moves a project toward the higher end:

Larger tank capacity for bigger homes or higher bedroom counts
Difficult yard access, tree roots, or drainage field regrading
Permitting and re-inspection requirements through Montgomery County Environmental Health
Sprinkler field expansion or relocation if the original layout is failing

Replacement is a last resort in most cases — a well-maintained aerobic system with a consistent inspection history often gets years more life out of targeted repairs. Part of what a maintenance contract buys you is exactly that: catching a failing aerator or pump before it takes the whole system down.

Red flags in a cheap contract

A rock-bottom price is sometimes just a rock-bottom price — but in this industry it's also one of the most common ways homeowners end up out of compliance without realizing it. Before you sign with the lowest bidder, watch for:

Fewer than three visits a year with no remote monitoring to justify the reduced schedule — that's below the legal minimum.
No mention of who files the report with Montgomery County Environmental Health, or when. Someone has to file it — confirm it's them, and confirm it's on time.
Vague licensing claims. Ask directly whether they hold a current TCEQ maintenance provider license and are authorized to service your specific system brand.
Everything is an "extra." If chlorine, minor parts, and even the inspection report itself are all separate line items on top of the base price, the real annual cost can end up higher than a competitor's all-in quote.
No local presence. A provider with no track record servicing Conroe, Willis, Montgomery or Magnolia subdivisions may not know your system brand or your county's exact reporting process.

Questions to ask any provider before you sign

How many inspection visits per year, and what's included in each one?
Do you file the compliance report directly with Montgomery County Environmental Health?
Are chlorine tablets and minor parts included, or billed separately?
What's your typical response time for an alarm or emergency call?
Can you service my specific system brand?
Is pricing locked for the contract term, or does it increase at renewal?

We're happy to answer every one of these on a free call — no pressure, no obligation. If you just want a number to compare against your current provider's renewal notice, call (936) 000-0000 and we'll walk your situation through with you.

Get a straight-answer quote today

Whether you need a new maintenance contract, a repair estimate, or you're comparing us against your current provider's renewal price, we'll give you a clear number — not a runaround.

Call (936) 000-0000