Septic Systems in Sheridan County, WY

Regulations, costs, soil data & local providers

Pop. 30,921 ~26.4% on septic ~3,265 septic homes

Septic pumping in Sheridan County, Wyoming costs $350-$700 (avg $500). A new septic system installation costs $6,650-$13,300. Approximately 3,265 homes in this county use septic systems.

Septic System Costs in Sheridan County

ServiceLowAverageHigh
Pumping / Cleaning$350$500$700
Routine Inspection$250$350$500
Real Estate Inspection$450$650$900
Minor Repair$850$1,200$5,800
Conventional Installation$6,650$9,500$13,300
Aerobic System Installation$12,500$17,850$25,000
Drainfield Replacement$6,650$9,500$13,300
Perc Test$1,000$1,450$2,050

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

Groundwater & Water Table in Sheridan County

Monitoring Wells
21
Avg Depth to Water
24.6 ft
Median Depth
12.8 ft
Shallowest Recorded
0.6 ft Shallow Risk

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

Source: USGS National Water Information System. Based on 22 measurements from monitoring wells.

Septic Regulations & Permits in Sheridan County

State Regulatory Body
Wyoming Department of Health/Environment
Inspection Required for Home Sale
No / Varies
Nitrogen Reduction Areas
No
Advanced Treatment Required
No

Contact county health department for specific requirements.

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

Septic System FAQ for Sheridan County

How much does septic pumping cost in Sheridan County?
Septic pumping in Sheridan County, Wyoming typically costs between $350 and $700, with an average of $500. 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 Sheridan County?
A conventional septic system installation in Sheridan County typically costs $6,650-$13,300. An aerobic treatment unit (ATU) costs $12,500-$25,000. Costs include the tank, drainfield, permits, and labor.
Do I need a permit for a septic system in Sheridan County?
Yes. Virtually all counties in Wyoming 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 Sheridan County health department for current requirements and fees.
What soil types are in Sheridan County and how do they affect septic systems?
Contact the county health department for soil evaluation requirements.
How often should I pump my septic tank in Sheridan 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 Wyoming have mandatory pumping schedules — check with your local health department.
How long does a septic system last in Sheridan County?
A well-maintained septic system in Sheridan 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. 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

Population30,921
Est. Septic Homes3,265
Avg Pumping Cost$500

Common Septic Services

Pumping: $350-$700
Inspection: $250-$500
Repair: $850-$5,800
Installation: $6,650-$13,300

Data last updated: 2026-04-13