Septic System Installation in New Ulm, Texas
Licensed, bonded septic installers in New Ulm and across Austin County. We handle the soil test, the county permit, and the full install.
Licensed & Bonded
Texas OSF installer
Permitted & Inspected
County health-dept approved
New Installs Only
Built right the first time
Free Estimates
No-obligation, on-site
Instant Estimate
Your New Ulm septic estimate in 60 seconds
A few quick questions and you'll see your system size and a price range. No obligation, no contact info to start.
What are you installing a septic system for?
We specialize in new installs for homes on rural land.
New Ulm & Austin County
New construction, manufactured & mobile homes
Out around New Ulm, homes beyond the reach of city sewer run on their own septic system. We install new systems for new builds, manufactured homes, and mobile homes. We run the soil and perc testing, pull the Austin County permit, and build it to pass inspection the first time.
Get My Free EstimateNew Ulm, first known as Duff's Settlement and renamed by German settlers after 1845, is an unincorporated community near the Colorado County line. New Ulm Water Supply Corporation runs a small sewer system; beyond it, Austin County permits septic systems.
Septic systems in New Ulm
New Ulm's state historical marker records that it was first known as Duff's Settlement, after James C. Duff, who was granted the land in 1841, and that it was settled by Germans after 1845 and renamed for the German city of Ulm. It's an unincorporated community, with 285 people in the 2020 census, about a mile from the Colorado County line on FM 109 and FM 1094. New Ulm Water Supply Corporation operates a small wastewater plant on Bernard Road under a state discharge permit, and its state-certified sewer service area covers only part of the community, so a lot outside it, or far from a line, needs its own septic system. Because New Ulm isn't a city, there's no city permit or extraterritorial jurisdiction; Austin County Planning & Development in Bellville issues the septic permit, and the county's rules apply in full: a permit regardless of tract size, a one-acre minimum residential lot even with public water, a development permit and a posted 911 address first, and $275 for a conventional system or $375 for an aerobic one. The county's 2025 subdivision rules prefer a connection to a community sewer where the site is less than 300 feet from it. The soils here are mostly sandy on top, as the table below shows.
Septic conditions around New Ulm
We ran 35 spots within 5 miles of downtown New Ulm through the same public data our free land check uses: the USDA soil survey, FEMA's flood maps and the National Wetlands Inventory. Here is what they show for a new septic system.
97%
34 of 35 spots
Soil the USDA rates "very limited" for a standard septic drainfield
100%
35 of 35 spots
Point to an aerobic system instead of a conventional drainfield
9%
3 of 35 spots
Inside a FEMA high-risk flood zone (the 100-year floodplain)
14%
5 of 35 spots
A mapped wetland within about 100 feet
Most of the ground around New Ulm won't take a standard gravity drainfield: water moves through the soil too slowly. Plan on an aerobic system with spray or drip dispersal, from $11,950 installed. The two soil borings on your own lot make the final call. Prices cover the system and installation; the site evaluation, design and county permit are quoted separately.
3 of the 35 spots are in a FEMA high-risk flood zone. A lot there adds floodplain rules to the septic design and usually a county floodplain permit, so check your lot's zone early.
Most common soils around New Ulm
| Soil | Spots | Drainfield rating | Main limitation |
|---|---|---|---|
| CatillaCatilla loamy sand, 1 to 5 percent slopes | 8 | Very limited | Slow drainage |
| TremonaTremona fine sand, 1 to 5 percent slopes | 5 | Very limited | High water table, Slow drainage |
| CrockettCrockett fine sandy loam, 2 to 5 percent slopes, eroded | 4 | Very limited | Slow drainage |
| StraberStraber loamy fine sand, 1 to 3 percent slopes | 3 | Very limited | Slow drainage |
| FrelsburgFrelsburg clay, 3 to 5 percent slopes | 2 | Very limited | Slow drainage |
13 more spots on 12 other soil types.
A map sample isn't your lot. The USDA soil survey maps the landscape at 1:24,000, and Texas requires a licensed site evaluator or engineer to evaluate every tract before a permit (30 TAC §285.30). Run your own address through the free land check to see what the maps show for your lot.
Check my land freeSources: USDA NRCS Soil Survey (SSURGO), FEMA National Flood Hazard Layer, USFWS National Wetlands Inventory. 35 spots on a 1.6-mile grid, checked October 2, 2026.
What we install in New Ulm
Site Evaluation & Perc Testing
We evaluate your soil and run the percolation test that determines how well your ground absorbs water — the foundation of a system that works.
System Design & Sizing
We size the tank and drainfield to your home's bedroom count and your soil's absorption rate, then engineer a layout that fits your lot.
Permitting & County Approval
We prepare and submit your on-site sewage facility (OSF) permit application and coordinate approvals with your county health department.
Excavation & Site Prep
We prepare the site and excavate for the tank and drainfield with the right grade and setbacks — protecting your wells, structures, and property lines.
Tank Installation
We set the septic tank, connect the inlet and outlet plumbing at the correct grade, and install the effluent filter and risers for easy future access.
Drainfield Installation
We install the drainfield (leach field) that disperses treated effluent safely into the soil, sized to your percolation results and available area.
Built for Austin County soils
Advanced aerobic treatment systems
The USDA soil survey rates most of the ground around New Ulm "very limited" for a standard drainfield: it drains too slowly, holds a high water table part of the year, or both. On lots like that a standard gravity drainfield won't pass, so you'll need an aerobic system with drip or spray dispersal. We don't guess at it — the on-site soil test tells us exactly what your lot can take.
We handle Austin County permitting for New Ulm
Septic permits around New Ulm are issued locally, usually by Austin County. We put the application together, turn in the soil and design paperwork, and stay on it through approval and the final inspection — so you're not the one chasing the permit office.
New to septic? Our guides cover the basics: How Much Does It Cost to Install a Septic System in Texas? (2026) · What Size Septic Tank Do I Need? · What Is a Perc Test (and Why Does It Matter)?
Local OSSF permitting authority: Austin County Planning & Development Department
Typical county permit fee: About $275–$375 (county fees change — we confirm the current amount during permitting)
Permit steps, fees and FAQs for Austin CountyWhy New Ulm homeowners choose us
Licensed & Bonded
Move forward knowing your project is handled by a licensed, bonded installer.
New Construction & Mobile Home Specialists
We install new systems for new construction, manufactured, and mobile homes — so we're fast, precise, and up to date on the rules.
We Handle the Permits
Soil testing, design documentation, and county OSF approval — all managed for you.
Honest, Upfront Estimates
Clear, itemized quotes after we evaluate your site. No pressure, no surprises.
Local & Dependable
We know your county's requirements and show up when we say we will.
Built to Last
Properly sized, properly installed, and restored clean — a system you can forget about.
How your New Ulm install works
Instant estimate
Get a ballpark price for your New Ulm project online in about a minute.
Free on-site evaluation
We test your soil and confirm the right system for your lot.
Permit & design
We handle the Austin County OSSF permit end to end.
Install & inspection
Professional installation and final county sign-off.
What homeowners say
"Quick flow septic was a great experience!! Honest, good prices, and quick to respond to customer’s questions and concerns. Alex and his team will do everything to make it right. Would definitely recommend. 10/10"
"They handled our soil test, permit, and full septic install for our new build. The process was clear, the crew stayed on schedule, and the county inspection passed the first time."
The Ramirez Family
Montgomery County, TX
"We needed septic for our manufactured home and they took care of everything from design to approval. Clear pricing, good communication, and no surprises."
Carlos & Elena Martinez
Waller County, TX
"Our property was raw land and we did not know where to start. They sized the system, handled the county paperwork, and kept the project moving."
The Johnson Family
Liberty County, TX
"Responsive, professional, and familiar with the local requirements. They made the permit and installation process much easier than we expected."
Miguel Hernandez
Fort Bend County, TX
New Ulm septic questions
Is there sewer in New Ulm?
In part of it. New Ulm Water Supply Corporation runs a small wastewater plant, and its state-certified sewer service area covers only part of the community. A service area isn't proof of a line at every lot, so we check with the water supply corporation; lots outside its area need their own septic system.
Who permits septic systems in New Ulm?
Austin County Planning & Development in Bellville, since New Ulm is unincorporated. The county requires a development permit and a posted 911 address first, a permit regardless of tract size, and a one-acre minimum residential lot even with public water. The permit costs $275 for a conventional system or $375 for an aerobic one.
Will I need an aerobic septic system in New Ulm?
Probably. Of the 35 spots we checked within 5 miles of downtown New Ulm, 35 point to an aerobic system, mainly because water moves through the soil too slowly. Aerobic systems start at $11,950 installed (the site evaluation, design and permit are quoted separately). The two soil borings on your lot make the final call.
Is New Ulm in a flood zone?
Parts of the area are. 3 of the 35 spots we checked within 5 miles of downtown New Ulm are inside a FEMA Special Flood Hazard Area (the 100-year floodplain). Your own lot's zone is what counts, so run the address through our free land check before you buy or design.
Do you install septic systems in New Ulm?
Yes. We install new septic systems on land in and around New Ulm and across Austin County — for new construction, manufactured homes, and mobile homes. Inside city limits that have city sewer, you'll usually connect to the sewer instead.
How much does a septic system cost in New Ulm?
Most New Ulm installs run between $8,000 and $13,950 — $8,000 for a conventional system where the soil allows it, $11,950 for an aerobic spray system, and $13,950 for an aerobic system with drip dispersal. The soil evaluation (perc test), the engineered design, and the county permit are quoted separately. Run the instant estimate for a ballpark, and we'll confirm the exact number once we've seen the lot.
Do I need a permit for a septic system in New Ulm?
Yes. Every new septic system needs a permit and a soil evaluation before anyone digs. Around New Ulm the permit usually comes from Austin County, and we take care of all of it for you.
Check your New Ulm lot before you buy or build
Soil rating, flood zone, wetlands, and the likely septic system type for any New Ulm address — free, in seconds.
Get your free New Ulm septic estimate
Tell us a little about your New Ulm property and we'll size your system and set up a free visit. No pressure, no obligation.