...The zebra mussel, a native of European freshwater rivers and lakes, was first reported in the Great Lakes in 1988; since then, the species has moved eastward into the St. Lawrence River and the Hudson River; the zebra mussel has impacted both water dependent industries and the native biological communities; using water chemistry data derived from several different sources and applied to surface flowing, surface standing and groundwater, maps have been prepared showing areas within MA susceptible to zebra mussel colonization and its potential effects...