Marion County’s drinking water is provided to approximately 450,000 homes and businesses. Within the City of Indianapolis, drinking water is supplied by Citizens Water and consists of a continuous blend of surface water and groundwater.
In the Town of Speedway, drinking water is provided by Speedway Water Works from a combination of surface or groundwater sources depending on the season. The City of Lawrence relies exclusively on groundwater for its drinking water.
The annual MCWEC report summarizes the status of Marion County’s wellfield protection program as of December 2019 and provides information on general business types present in the wellfields, along with potential groundwater contaminant sources and local, state and federally regulated sites.