NRDC: California's Contaminated Groundwater - Map of Drinking Water Sources

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California's Contaminated Groundwater
Is the State Minding the Store?

Drinking Water Sources That Exceed Maximum Contaminant Levels

This map displays the location of drinking water sources (groundwater wells only) with at least one contaminant that exceeded a state drinking water standard, as reported to the Department of Health Services, between October 1999 and October 2000.

Drinking Water Sources That Exceed Maximum Contaminant Levels

Source: Data from the Department of Health Services (DHS) Drinking Water Database (October 1999–October 2000); compiled by LFR Levine-Fricke; mapped by NRDC.

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