Why so many Elgin systems are aerobic
When a site evaluation says the lot is too small or the soil won’t percolate a conventional drainfield — common calls on smaller ranchette splits and some of the tighter ground around here — the answer is an aerobic treatment unit. Air pumped through the tank feeds bacteria that do serious treatment, chlorine disinfects, sprinklers distribute. It’s a genuinely better effluent... in exchange for machinery. And machinery has opinions: compressors quit in August heat, sprayer heads clog with wasp nests, chlorinators run dry quietly.
The contract: what $250–$450 a year buys
Texas requires licensed inspection of every ATU three times a year, and in a county that permits and tracks every system, that requirement has teeth. A contract covers the three visits — aeration and compressor check, sprayer function, chlorine level and residual test, floats and alarms, sludge depth — plus the reporting that keeps you square with Bastrop County Development Services. Minor tune-ups happen on the spot; real parts (sprayer pumps $450–$1,200) get quoted first. Think of it as the system’s oil-change subscription, except skipping it is also a compliance problem.
Your ten minutes a month
Keep septic-rated chlorine tablets stocked (calcium hypochlorite only — never pool tablets, which are dangerous in septic chlorinators and don’t disinfect effluent properly), leave the spray area unplanted and unparked, take the alarm light seriously, and be kind to your bacteria — grease, wipes and heavy antibacterial cleaners all sabotage the little plant working for you. That’s the whole homeowner job description.
Buying a place that has one?
Ask three questions before closing: Is there a current maintenance contract, and does it transfer? When was the tank last pumped (aerobic tanks still accumulate sludge)? And is the system’s paperwork on file with the county? A yes-yes-yes system is a non-issue. A no-no-shrug system is a negotiating point — see our inspection page before you sign anything.
Common questions
Is the maintenance contract legally required?
The three annual inspections are required by Texas rules for aerobic systems, and Bastrop County tracks compliance. A contract ($250–$450/yr around Elgin) is how virtually everyone meets the requirement.
What happens if I just... don’t?
Two things, usually in order: small mechanical problems compound unwatched (a $30 chlorine lapse becomes a $900 pump job), and eventually the county notices the missing reports. Neither is cheaper than the contract.
Why can’t I use pool chlorine tablets?
Pool trichlor tablets are a different chemical. In a septic chlorinator they can create hazardous conditions and they don’t properly disinfect effluent. Farm and feed stores around Elgin stock the correct calcium hypochlorite septic tablets.
The alarm is going off. Now what?
Don’t panic, don’t ignore. Cut water use, silence the buzzer if it has a switch, and call (737) 232-4320 today. It’s usually a float, breaker or compressor — quick fixes when caught, tank trouble when left for a month.
Get on a maintenance contract
Tell us where the property is and the system brand if you know it (check the control panel lid). A licensed provider will call you back — usually the same day.
Got it — expect a call back shortly.