Septic Systems in Lamb County, TX

Regulations, costs, soil data & local providers

Pop. 13,045 ~22.4% on septic ~1,169 septic homes Well drained soil

Septic pumping in Lamb County, Texas costs $300-$550 (avg $400). A new septic system installation costs $5,300-$10,650. USDA soil data rates 7.4% of county soils as suitable for septic absorption fields. Approximately 1,169 homes in this county use septic systems.

Septic System Costs in Lamb County

ServiceLowAverageHigh
Pumping / Cleaning$300$400$550
Routine Inspection$200$300$400
Real Estate Inspection$350$500$700
Minor Repair$650$950$4,600
Conventional Installation$5,300$7,600$10,650
Aerobic System Installation$10,000$14,250$19,950
Drainfield Replacement$5,300$7,600$10,650
Perc Test$800$1,150$1,600

Cost estimates based on regional market data for Lamb County, Texas. Actual costs depend on system type, site conditions, and provider.

Soil & Septic Suitability in Lamb County

Drainage Class
Well drained
Hydrologic Group
B
Unique Soil Types
46

Dominant Soil Types

Soil SeriesCoverageDrainageHydro Group
Mansker 607 Well drained B
Zita 535 Well drained B
Berda 442 Well drained B
Amarillo 381 Well drained B
Arch 288 Well drained B

Septic Tank Absorption Field Suitability

USDA NRCS rates soil suitability for septic absorption fields across this county:

Not Limited (Good)7.4%
Somewhat Limited60%
Very Limited32.6%

Overall rating: Somewhat limited

Source: USDA NRCS Soil Survey Geographic Database (SSURGO)

Groundwater & Water Table in Lamb County

Monitoring Wells
67
Avg Depth to Water
179.7 ft
Median Depth
150.9 ft
Shallowest Recorded
33 ft

Water table depths in this county are generally favorable for conventional septic systems.

Source: USGS National Water Information System. Based on 129 measurements from monitoring wells.

Septic Regulations & Permits in Lamb County

State Regulatory Body
Texas Commission on Environmental Quality (TCEQ)
Inspection Required for Home Sale
No / Varies
Nitrogen Reduction Areas
No
Advanced Treatment Required
In designated areas

On-Site Sewage Facility (OSSF) permits required. Authorized agents at county level.

Contact the Lamb County health department for current permit requirements, fees, and approved system types.

Septic System FAQ for Lamb County

How much does septic pumping cost in Lamb County?
Septic pumping in Lamb County, Texas typically costs between $300 and $550, with an average of $400. Costs vary by tank size (1,000-1,500 gallons is typical), ease of access, distance from the pumping company, and how full the tank is. Most homeowners should pump their tank every 3-5 years.
How much does a new septic system cost in Lamb County?
A conventional septic system installation in Lamb County typically costs $5,300-$10,650. An aerobic treatment unit (ATU) costs $10,000-$19,950. Given the predominantly well drained soils in this area, some sites may require alternative system types. Costs include the tank, drainfield, permits, and labor.
Do I need a permit for a septic system in Lamb County?
Yes. Virtually all counties in Texas require a permit before installing, repairing, or replacing a septic system. The permit process typically involves a soil evaluation or percolation test, system design by a licensed professional, application to the county health department, and one or more inspections during installation. Contact the Lamb County health department for current requirements and fees.
What soil types are in Lamb County and how do they affect septic systems?
Lamb County has predominantly Mansker, Zita, Berda soils. The dominant drainage class is Well drained with hydrologic group B. The USDA rates 7.4% of surveyed soils as "Not Limited" for septic absorption fields, 60% as "Somewhat Limited", and 32.6% as "Very Limited".
How often should I pump my septic tank in Lamb County?
The EPA recommends pumping your septic tank every 3-5 years for a typical household. The exact frequency depends on tank size, household size, and water usage. A 1,000-gallon tank serving a family of 4 should generally be pumped every 3 years. Some counties in Texas have mandatory pumping schedules — check with your local health department.
Can I install a conventional septic system in Lamb County?
It depends on your specific site. USDA soil data shows that 32.6% of soils in Lamb County are rated "Very Limited" for septic absorption fields, while only 7.4% are "Not Limited." This means many properties will require alternative systems such as mound systems, pressure distribution systems, or aerobic treatment units. A percolation test ($800-$1600) and soil evaluation are required before the county will approve a system design.
How long does a septic system last in Lamb County?
A well-maintained septic system in Lamb County typically lasts 25-30 years, though some components may need attention sooner. The concrete septic tank itself can last 40+ years, while the drainfield — the most critical and expensive component — usually lasts 15-25 years depending on soil conditions (Lamb County has predominantly well drained soils). Regular pumping every 3-5 years and avoiding excess water usage are the two most effective ways to extend system life.

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Quick Facts

Population13,045
Est. Septic Homes1,169
Avg Pumping Cost$400
Drainage ClassWell drained
Septic SuitabilitySomewhat limited

More in Texas

Hockley County Castro County Bailey County Hale County Parmer County Cochran County

Common Septic Services

Pumping: $300-$550
Inspection: $200-$400
Repair: $650-$4,600
Installation: $5,300-$10,650

Data last updated: 2026-04-13