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Abstract or Description

Arsenic is a toxic heavy metal that has been detected in much of Maine’s well water, and its widespread occurrence in Maine groundwater resources has become a public health issue. This map displays the towns whose domestic wells, by percentage of wells sampled, have had arsenic concentrations in excess of 10 micrograms per liter (µg/L) of well water, the U.S. Environmental Protection Agency’s maximum contaminant level for arsenic in public water.

The towns in which Maine's thirty most-contaminated wells can be found are denoted as well, as are the locations of public-supply wells and groundwater resources (aquifers) throughout the state.

About the Author

Avery Beck (’14) is a Global Studies and Environmental Studies: Policy double major, with an interest in food policy and environmental ethics. She is originally from Chappaqua, New York.

Source Data Note

Source Data: The Maine Office of GIS (MEOGIS), the Maine Geological Survey, ESRI ArcGIS10, the U.S. Geological Survey (USGS) National Water-Quality Assessment Program Report "Assessment of Arsenic Concentrations in Domestic Well Water, by Town, in Maine 2005-09".

Projected using Universal Transverse Mercator Zone 19N with NAD 1983 Datum.

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