The Lincoln County Environmental Health Lab at the county health office in Davenport tests private well water.
Tests. State-certified coliform bacteria testing. The lab also offers nitrate and fluoride screening, which the county notes is not state-certified.
Prices. Fees published on the county’s drinking water page (viewed 2026-10-24): coliform $30, nitrate screening $10, fluoride screening $10. Mailed samples need extra postage.
Bottles and drop-off. Use the lab’s sterile containers, available at the office during business hours; samples in other containers are not accepted. Samples can be dropped off or mailed, and must reach the office during lab hours within 30 hours of collection. Lab hours are Monday to Wednesday 8am to 4pm and Thursday 8am to noon, with no testing Friday to Sunday.
Accreditation. Ecology accreditation H461 (current certificate H461-26). Ecology’s drinking water scope covers total coliform and E. coli. The Department of Health lists the lab for coliform testing.