MassGIS 2003 Massachusetts Cape Cod Non-potential Drinking Water Source Areas (March 1997)

Polygons for which the item NPDWSA = 1 are designated as NPDWSAs; those coded 0 for NPDWSA are not designated as NPDWSAs. As defined in the MCP, a Potentially Productive Aquifer means all aquifers delineated by the USGS as high or medium yield, and all aquifers located east of the Cape Cod Canal (Cape Cod), on the Elizabeth Islands, on Martha's Vineyard, or on Nantucket. NPDWSA polygons were delineated by the DEP based on land use information in the MassGIS land use coverage and population density data from the 1990 US Census.

Municipalities were given the opportunity to review the DEP's delineation of NPDWSAs prior to the September 1996 promulgation of the current MCP groundwater clean up regulations. The delineation of NPDWSAs may reflect additional land use information provided by municipalities.