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Drinking Water

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About Drinking Water

The U.S. Environmental Protection Agency describes a Sole Source Aquifer as one which supplies at minimum 50% of the drinking water consumed in the area overlying the aquifer.  Cape Cod illustrates an excellent example of a Sole Source Aquifer, and reiterates the need to protect groundwater.

In July of 1982, the Environmental Protection Agency designated Cape Cod’s water supply as a Sole Source Aquifer:


Tuesday, July 13, 1982

*30282 AGENCY: U.S. Environmental Protection Agency.

SUMMARY: Pursuant to Section 1424(e) of the Safe Drinking Water Act the Administrator of the U.S. Environmental Protection Agency (EPA) has determined that the Cape Cod aquifer is the sole or principal source of drinking water for Cape Cod, Massachusetts, and that the Cape Cod aquifer, if contaminated, would create a significant hazard to public health. As a result of this action, Federal financially assisted projects constructed anywhere on Cape Cod will be subject to EPA review to ensure that these projects are designed and constructed so that they do not *30283 create a significant hazard to public health.


For more information on Drinking Water follow these links:

Cape Cod’s Sole Source Aquifer Federal Register

Cape Cod Commission: Drinking Water Supplies

Cape Cod Water Protection Collaborative

Massachusetts Drinking Water