Weld County septic permits and inspection rules

Permit requirements

Weld County requires OWTS applications for new installations, repairs, upgrades, reconnections, and vault installations, for systems with flows under 2,000 gallons per day. Design and construction standards live in Weld County Code Chapter 30.

What triggers an inspection

County inspections close out new installation and repair permits. Weld County does not inspect at property sale, so failures, complaints, and permit work are the main triggers.

Transfer of title rules

Weld County does not have a transfer-of-title inspection or use permit program. The county still recommends having the system inspected and the tank cleaned before ownership transfers, and buyers should ask for records, because no county gate will catch a failing system at closing.

Required pumping frequency

Weld County recommends annual inspections to determine when the tank should be pumped, based on sludge and scum measurements rather than a fixed calendar. For most households that means pumping every three to five years.

• Measurement beats guessing, especially with garbage disposals
• Keep pumping receipts for future buyers since the county does not require them

Setback rules

Weld County codifies its OWTS distances in County Code Chapter 30, built on the Colorado Regulation 43 minimums: 100 feet from a well to the soil treatment area, 50 feet from a well to the tank, 50 feet from surface water, 10 feet from property lines, and 5 feet from a dwelling to the tank. Confirm parcel specifics with Environmental Health Services.

Soil and percolation testing

New systems require soil evaluation to size and site the soil treatment area under Chapter 30. Sandy river-bottom soils and heavy clays both occur in southwest Weld County, and the soil profile determines which system type the county will approve.