As a part of a State program to protect the quality of groundwater in Connecticut from contamination, towns regulate uses located on land that contributes water to public water supply wells. To better do so, Old Saybrook's Town Code names the Inland Wetlands & Watercourses Commission as the Town's Aquifer Protection Agency.
An "aquifer" is a large area of subsurface water in a geologic formation, known as stratified drift, that is able to yield water to wells. Old Saybrook has two aquifers -- the Holbrook Aquifer is in the northwestern part of Town extending over the Westbrook line, and the Saybrook Aquifer is in the area of Bokum Road/Middlesex Turnpike.
The Agency registers facilities and regulates uses located on in the aquifer protection area, which contributes water to public water supply wells.