The purpose of this District is "to maintain the long term integrity of the Raccoon Valley Aquifer by properly managing the location, type and operation of existing and proposed land uses in sensitive aquifer areas." (Comprehensive Plan) The District is further intended to safeguard the public health, safety, and welfare of the customers of protected public water supplies by regulating the land use and the storage, handling, use and/or production of Regulated Substances. The area of the Wellhead Protection Overlay is described on the Official Zoning Map. The intent of this designation is to protect the community's potable water supply from contamination.