Septic System Installation in the Brazos Valley
Building new, or replacing a system that's failing? We handle the full process: OSSF design, county paperwork, install, and final inspection. We'll look at your site and soil and tell you exactly what your property needs.
Septic installs for rural homes and acreage across the Brazos Valley
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Prefer to talk? Call/text (979) 286-3100.
Why Choose Cast
Licensed OSSF Installer II
Free On-Site Estimates
We Handle the County Paperwork
Family & Aggie-Owned
What Happens Next
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You send this form or give us a call.
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We get back to you within a day.
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Free on-site visit to check your site and soil.
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You get a clear, written quote. No charge, no obligation.
Cast Environmental Services. One family, one crew, one phone number.
Systems We Install
Aerobic System
An aerobic system is essentially a small treatment plant. It uses oxygen to break the waste down further than a conventional tank can, then pumps the treated water through spray heads across your yard. It's what we install most often here, because the region's heavy clay subsoil and tight lots rule out conventional on most properties. It also works in slow soils and needs a smaller drain field. The trade-off is the electricity it runs on and the maintenance contract Texas requires, which we cover for your first two years.
Conventional System
A conventional system is simply a tank and a drain field. Wastewater settles in the tank and the soil does the treating, so there are no pumps, no electricity, and no required maintenance contract, which keeps it cheaper to own over time. The catch is that it only works where the soil drains well and the lot has room for the drain field and its setbacks. That's the exception across most of the Brazos Valley, but when your property qualifies, we'll tell you.
Drip Distribution
With drip, an aerobic unit releases the treated water slowly through flexible lines buried just under the surface, instead of spraying it across your yard. It costs more than spray and doesn't add much on a typical lot, so we only use it when your site calls for it: an irregular or sloped lot, or a subdivision that bans visible spray. If yours is one of those, we'll tell you.
Still weighing your options? Read our Aerobic vs. Conventional guide.
Replacing a Failing System
If your system is backing up, pooling, or failing inspection, we install full replacements, aerobic or conventional, sized and designed for your property. Sometimes a repair will do the job, and we'll tell you honestly if it will. Either way it starts with a free on-site assessment, so you know what you're dealing with before you spend a dollar.
What We Handle For Your Install
We'll provide a seamless process from initial planning to final county inspection.
On-Site Sewage Facility (OSSF) Design
New systems and full system replacements are required to be designed by a licensed professional designer. We can schedule time with our recommended designers and include this fee in your final invoice, or you can select and have the system designed yourself.
Required County Paperwork
We will facilitate all required paperwork with the county to make the system installation process as simple as possible utilizing digital technology as available by the county.
Note: A notarization will be required for all county affidavits.
System Installation
Upon county approval, we will complete the installation in line with the OSSF design. Residential installations typically take 1–3 days once started. Commercial timelines vary depending on system size and site conditions — we'll give you a realistic estimate upfront.
County Inspection
All systems must be inspected by the County Designated Representative and approved prior to use. We schedule the inspection quickly following the completion of the install to ensure the system is properly installed and ready for use.
Ongoing Maintenance
Texas requires all OSSF systems to be maintained by a licensed professional. All new aerobic systems include two years of routine maintenance and required county reporting at no additional charge. After two years, we offer ongoing maintenance contracts.