Sanitary Sewer Service Area (5)
| Unknown |
| Private |
| City of Columbia |
| Alpine Utilites |
| Town of Batesburg-Leesville |
| Bush River Utilites |
| Carolina Water Service |
| City of Cayce |
| Town of Chapin |
| E. Richland County PSD |
| Town of Eastover |
| Fairfield County |
| Fort Jackson |
| Town of Lexington |
| Lexington County JMWSC |
| Midlands Utility |
| Mitford Rural WD |
| City of Newberry |
| Newberry County WSA |
| Palmetto of Richland County |
| Palmetto Utilities |
| Richland County |
| Town of Ridgeway |
| Town of Springdale |
| Town of Swansea |
| City of West Columbia |
| Town of Whitmire |
| Town of Winnsboro |
| Univ. of SC |
| South Carolina |
| Federal |
| South Carolina Water Utilities |
Water Pressure Zone (7)
| Chapin |
| Downtown |
| Eau Claire |
| Green Lakes |
| Hobart |
| Horseshoe |
| Lake Murray |
| Lower Richland |
| Metro WWTP |
| Northeast |
| Percival Road |
| Shop Road |
| St. Andrews |
| Unknown |
| Upper Richland |
| Windsor Shores |
Water Service District (8)
| District 1 |
| District 2 |
| District 3 |
| District 4 |
| District 5 |
| Fort Jackson |
Inspector Boundary Area (9)
| Alan Cockrell |
| Andy Crooks |
| Barrett Burgess |
| Billy Elswick |
| Chris Harrision |
| Kerry Jones |
| Kip Huggins |
| Matt Blackwell |
|