What is in the well water where you live?
Public agencies have tested tens of thousands of private wells for arsenic, radon, uranium, PFAS and more. Well Water Nerd turns those records into a plain answer for every county and town, with the source named on every number.
Maine
- Androscoggin County15% arsenic
- Aroostook County4% nitrate
- Cumberland County20% uranium
- Franklin County10% arsenic
- Hancock County22% arsenic
- Kennebec County28% arsenic
- Knox County17% arsenic
- Lincoln County7% uranium
- Oxford County9% uranium
- Penobscot County8% arsenic
- Piscataquis County12% arsenic
- Sagadahoc County5% arsenic
- Somerset County18% arsenic
- Waldo County9% arsenic
- Washington County17% arsenic
- York County23% arsenic
New Hampshire
- Belknap County22% arsenic
- Carroll County26% arsenic
- Cheshire County17% lead
- Coos County17% lead
- Grafton County13% lead
- Hillsborough County24% arsenic
- Merrimack County33% arsenic
- Rockingham County34% arsenic
- Strafford County40% arsenic
- Sullivan County15% lead
Vermont
- Addison County2% arsenic
- Bennington County3% arsenic
- Caledonia County1% arsenic
- Chittenden County4% arsenic
- Essex County0% arsenic
- Franklin County3% arsenic
- Grand Isle County<1% nitrate
- Lamoille County3% arsenic
- Orange County3% arsenic
- Orleans County6% uranium
- Rutland County13% arsenic
- Washington County1% arsenic
- Windham County1% arsenic
- Windsor County1% arsenic