case studies

Wellhead Protection Plans and
Annual Contamination Source Inventory



Memphis Light Gas and Water, City of Millington, Town of Collierville, City of Germantown, City of Bartlett


Wellhead Protection Plans and Annual Contamination Source Inventory

Wellhead protection aims to inventory and understand potential contamination sources in the area surrounding public drinking supply wells. Preserving the area around wells protects the supply of drinking water.

State agencies require local or regional public water utilities to identify potential contamination sources in wellfields or source water areas (i.e., reservoirs or streams) that supply drinking water. CAESER produces and maintains wellhead protection plans for various municipal utilities within Shelby County. As part of the plans, CAESER conducts annual windshield surveys within wellhead protection areas (WHPA) defined by groundwater models based on aquifer characteristics and time-of-travel. Facilities that could potentially contaminate drinking water within the WHPA are inventoried and compared against our internal database of federal and state regulated facilities including, but not limited to, RCRA-facilities, Superfund, underground storage tanks, dry cleaners, solid waste, etc. The inventoried list of potential contamination sources is provided annually to the Tennessee Department of Environment and Conservation (TDEC) and the respective utility.

The contamination source inventory infuses regulatory information that allows the utility to request and review information available by state and federal agencies. Therefore, if there is a facility with contamination that falls within a 10-year time-of-travel from a production well, the utility can request TDEC documents necessary to make an informed decision regarding the safety of the drinking water source and mitigate potential issues.

Other State and Federal Information Sources: