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There are nine primary utilities that provide water and wastewater services to residents and businesses in Lexington County. The following is a list of the primary water and sewer providers in Lexington County:

Carolina Water Service P.O Box 4539 West Columbia, SC 29171 Phone: 1-800-272-1919 Serves: By subdivision
City of West Columbia P.O Box 4044 West Columbia, SC 29171 Phone: (803) 791-1880 Serves: West Columbia and surrounding communities
Columbia Water Department P.O Box 7997 Columbia, SC 29202 Phone: (803) 733-8285 Serves: Chapin and Irmo
Joint Municipal Water & Sewer Commission (JMWSC) 2546 Two Notch Dr. Lexington, SC 29072 Phone: (803) 359-8373 Serves: Unincorporated parts of Lexington County south of Lake Murray
Town of Lexington 111 Maiden Lane Lexington, SC 29072 Phone: (803) 359-4164 Fax: (803) 359-4460 Serves: Lexington and parts of the surrounding community
City of Cayce 1800 12th St Ext P.O Box 2004 Cayce, SC 29171-2004 Voice: (803) 796-9020 Fax: (803) 796-9072 Serves: Cayce and parts of the surrounding community
Chapin Water and Sewer Department 103 Columbia Ave PO Box 418 Chapin, SC 29036 Voice: (803) 345-2444 ext. 108 Serves: Water/Sewer for the surrounding area outside of the Town of Chapin and sewer inside the Town. For water inside the Town of Chapin please contact the City of Columbia.
Town of Batesburg-Leesville 244 West Columbia Ave Batesburg, SC 29006 Voice: (803) 532-8301
Gaston Water District Company 1133 Mack Street Gaston, SC 29053 Voice: (803) 794-2819