Private well water testing in Maine, by county
Maine Tracking Network says more than half the people in Maine get drinking water from private wells, and Maine CDC says private wells are not regulated: owners are responsible for testing and treating their water. Maine CDC recommends testing every year for bacteria, nitrate and nitrite, and every 3-5 years for arsenic, radon, uranium and other chemicals.[1][2]
County guides
- Kennebec County Last verified 2026-10-26
Arsenic is the big one: 28% of Kennebec County wells tested at the state lab were over Maine's 10 µg/L guideline, the highest share of any Maine county. PFAS has been found over Ma...