/April 2017/ *This datalayer contains the watershed extents for all surface water supplies including active, inactive, emergency, sources outside of Massachusetts, watersheds that extend into other states and watersheds of sources from other states...
/April 2017/ *These Surface Water Supply Protection Areas delineate those areas included in 310 CMR 22.00, the Massachusetts Drinking Water Regulations, as Surface Water Supply Protection Zones* Download this layer Shapefile with ArcGIS 9.0 LYR (24...
/February 2005/ *These data delineate areas potentially served by larger public water suppliers, as of January 2004.* Download this layer: ESRI Shapefile (includes ArcView 3.x legend (.avl) and ArcGIS 9.0 layer file (.lyr) [1] These data...
/March 2010/ * This datalayer delineates areas in which certain waters are afforded Outstanding Resource Water (ORW) protection under the Massachusetts Surface Water Quality Standards, 314 CMR 4.00 (WQS). According to 314 CMR 4.04(3).* Download this...
/February 2019/ *This layer represents Non-Potential Drinking Water Source Areas (NPDWSA), which are regulatory in nature, representing one of many considerations used in determining the standards to which ground water must be cleaned in the...
/July 2007/ *Underground water sources of high, medium and low yield are in this layer.* Download this layer [1] (3.7 MB) ESRI shapefile with ArcGIS 10.0 layer file [2] MassGIS produced an aquifer datalayer composed of 20 individual...
