Buying Outside City Sewer Usually Means an Aerobic System
Once you get past Aledo, Weatherford, Springtown, Rhome, or Burleson, most homes are on septic instead of city sewer. For the last twenty years, on the clay soil that covers this part of Texas, the counties have required aerobic systems on most new construction: a treatment unit with an aerator, a pump, a chlorinator or UV light, and spray heads out in the yard. That’s what’s under most homes outside city sewer in Parker, Wise, Johnson, Denton, and Tarrant County, whether it’s a ranch or a half-acre lot in an older subdivision.
An aerobic system is yours to maintain, a replacement runs into the tens of thousands, and a general home inspection doesn’t cover it. The seller’s disclosure will tell you the system exists. It won’t tell you whether the aerator has been dead for a year or the spray field has been putting effluent on the surface. That’s what this inspection is for.
Aerobic Systems Only
I inspect aerobic (aerated treatment) systems. I don’t inspect conventional systems, the older septic-tank-and-gravity-drain-field kind. If the listing says “conventional” or “anaerobic,” or if the yard has no spray heads and no control box with an alarm light, tell me before you book and I’ll point you to a licensed septic contractor for that one.
Not sure which kind the house has? Look for:
- A control panel with an alarm light on an outside wall
- One or more access lids in the yard
- Sprinkler heads that aren't part of the lawn irrigation
If you’re still not sure, send me the listing and I’ll tell you.
What the Inspection Covers
My aerobic septic inspection follows the Texas Real Estate Commission’s Standards of Practice for septic systems. I report:
- The type of system
- The location of the drain or distribution (spray) field
- The proximity of anything that shouldn’t be too close to it: water wells, underground cisterns, water supply lines, ponds or creeks, sharp slopes or breaks, easement lines, property lines, other soil absorption systems, swimming pools, and sprinkler systems
And I report as Deficient:
- Visual or odor evidence of effluent seeping or flowing at the surface of the ground
- Inoperative aerators or dosing pumps
- Deficiencies in the accessible components, functional flow, site drainage and clearances around the system, and the aerobic discharge (spray) system
In practice that means I run the system, confirm the aerator and pump actually operate, check the alarm and accessible components, walk the spray area for wet spots, odor, and coverage, and look at how the site drains around the unit and the field.
What the Inspection Doesn't Cover
The TREC standard is clear about the limits, and so am I. I don’t excavate or uncover the system or its components, I don’t determine the size, adequacy, or efficiency of the system, and I don’t determine the type of construction used. If something I find needs those answers, the report says who to call: a licensed septic installer or maintenance provider.
What You Get
- A septic section in the inspection report with photos: what was found, what's Deficient, and what a licensed septic professional should address
- A clear read on whether to ask the seller for a repair, a service visit, or a credit before you close
- A walkthrough on site, with the rest of the inspection findings
- Pairs with a private well inspection and water testing on the same visit
What Clients Say
Frequently Asked Questions
Do you inspect conventional septic systems?
No, aerobic systems only. If the home has a conventional tank-and-drain-field system, I’ll refer you to a licensed septic contractor.
Do you open the tank or dig anything up?
No. The inspection covers the accessible components and the system in operation. Excavating and uncovering are outside the TREC standard and outside what I do.
Can you tell me if the system is big enough for the house?
No. Sizing and adequacy are determined by a licensed designer or installer, not by the inspection. What I can tell you is whether it’s operating, whether it’s discharging where it shouldn’t, and whether anything accessible is deficient.
How long does it take?
About an hour, done during the home inspection.
What if the home is on city sewer instead?
Then a sewer scope is the equivalent check: a camera through the line from the house to the street, done during the same inspection.
What does it cost?
It’s priced as an add-on to your home inspection and quoted when you book.
Schedule Your Aerobic Septic Inspection
I inspect aerobic septic systems on homes outside city sewer throughout Parker, Wise, Johnson, Denton, and Tarrant County, as part of a buyer’s inspection. Call or text 469-879-2772, or schedule online.