Regional Water Systems

Santee Cooper operates two wholesale water systems, one on Lake Moultrie and one on Lake Marion.  Both water systems have been honored with the “Best Tasting Water” award from the South Carolina Rural Water Association. 


Lake Moultrie

Launched in October 1994, the Santee Cooper Regional Water System was the first regional approach to water distribution in the Lowcountry.

The system uses a conventional treatment process and has the capacity to draw 40 million gallons of water per day (mgd) from Lake Moultrie. The Santee Cooper Regional Water System utilizes 26 miles of transmission pipeline to deliver drinking water to the Lake Moultrie Water Agency, which is comprised of the Berkeley County Water and Sanitation Authority, the City of Goose Creek, the Moncks Corner Public Works Commission and the Summerville Commissioners of Public Works. Santee Cooper owns the system's treatment plant, pump stations and facilities near Lake Moultrie's Lions Beach.  

The Santee Cooper Regional Water System is a member of the South Carolina Environmental Excellence Program (SCEEP), the American Water Works Association (AWWA), the South Carolina Rural Water Association (SCRWA), and actively participates in the AWWA Partnership for Safe Drinking Water Program and the S.C. Department of Health and Environmental Control Area Wide Optimization Program (AWOP). 


Lake Marion

The Lake Marion Regional Water System, located on Lake Marion near Santee, has a system capacity of 8 mgd and began commercial operation in 2008. The Lake Marion Water System utilizes a Membrane Ultrafiltration treatment process and has more than 120 miles of transmission pipeline serving surrounding towns and communities. At present, it serves five wholesale customers that also make up its governing body, the Lake Marion Water Agency.  The treatment plant and much of the transmission lines are owned and operated by Santee Cooper.

The Lake Marion Water System is a member of the American Water Works Association (AWWA), the South Carolina Rural Water Association (SCRWA) and also participates in the S.C. Department of Health and Environmental Control Area Wide Optimization Program (AWOP).