Water and Wastewater Service Areas

Water Service Area


We provide direct retail water service to 120,000 accounts, serving areas of Charleston, Berkeley, and Dorchester counties. To find out if you are in our water service area, click on the link for the searchable service area map below.

Sewer/Wastewater Service Area


Charleston Water System provides direct retail sewer service within the City of Charleston, unincorporated areas in West Ashley, parts of Johns Island within the urban growth boundary, and the Cainhoy peninsula. To find out if you are in our sewer service area, click on the link for the searchable service area map below.

Our Plum Island Wastewater Treatment Plant also handles wastewater from Folly Beach, Hollywood, Meggett, Ravenel, and the James Island Public Service District on a wholesale basis. However, we do not own or operate the sewer systems in these areas.

Searchable Service Area Map


To find out if a home, business, or vacant lot is in our water and / or sewer service area, view the map and search the address.

Service Availability for New Development


To find out if water and/or sewer service is available for a property, please complete the Request for Service Availability Letter form.