Septic Systems in Weld County, CO

Regulations, costs, soil data & local providers

Pop. 328,981 ~7% on septic ~9,211 septic homes

Septic pumping in Weld County, Colorado costs $400-$750 (avg $550). A new septic system installation costs $7,650-$15,350. Approximately 9,211 homes in this county use septic systems.

Septic System Costs in Weld County

ServiceLowAverageHigh
Pumping / Cleaning$400$550$750
Routine Inspection$300$400$550
Real Estate Inspection$500$750$1050
Minor Repair$950$1,350$6,700
Conventional Installation$7,650$10,950$15,350
Aerobic System Installation$14,400$20,550$28,750
Drainfield Replacement$7,650$10,950$15,350
Perc Test$1,150$1,650$2,300

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

Groundwater & Water Table in Weld County

Monitoring Wells
6
Avg Depth to Water
15.2 ft
Median Depth
11.4 ft
Shallowest Recorded
2.5 ft Shallow Risk

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

Source: USGS National Water Information System. Based on 46 measurements from monitoring wells.

Septic Regulations & Permits in Weld County

State Regulatory Body
Colorado DPHE
Inspection Required for Home Sale
No / Varies
Nitrogen Reduction Areas
No
Advanced Treatment Required
In designated areas

Varies by county. Many counties have transfer-of-title inspection requirements.

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

Septic System FAQ for Weld County

How much does septic pumping cost in Weld County?
Septic pumping in Weld County, Colorado typically costs between $400 and $750, with an average of $550. 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 Weld County?
A conventional septic system installation in Weld County typically costs $7,650-$15,350. An aerobic treatment unit (ATU) costs $14,400-$28,750. Costs include the tank, drainfield, permits, and labor.
Do I need a permit for a septic system in Weld County?
Yes. Virtually all counties in Colorado 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 Weld County health department for current requirements and fees.
What soil types are in Weld 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 Weld 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. With approximately 9,211 septic systems in Weld County, there are many local providers offering regular pumping services.
How long does a septic system last in Weld County?
A well-maintained septic system in Weld 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

Population328,981
Est. Septic Homes9,211
Avg Pumping Cost$550

Common Septic Services

Pumping: $400-$750
Inspection: $300-$550
Repair: $950-$6,700
Installation: $7,650-$15,350

Data last updated: 2026-04-13