| Linville-Haile Water System | Marion, LA | 1,635 | 647 | - |
| Union Parish Waterworks District 1 | Farmerville, LA | 1,626 | 939 | - |
| Cameron Parish Ww District 11 - Big Lake | Bell City, LA | 1,620 | 18 | - |
| Greenbriar Prairie Basse Water System | Sunset, LA | 1,620 | 73 | - |
| Wards Chapel Water System | Farmerville, LA | 1,620 | 510 | - |
| American Dream RV Park Water System | Englewood, LA | 1,605 | 6 | - |
| Liddieville Water System | Winnsboro, LA | 1,602 | 32 | - |
| Eastern Louisiana Mental Health Systems | Jackson, LA | 1,600 | 101 | - |
| Utilities Inc - Woodridge Subdivision | Mandeville, LA | 1,590 | 6 | - |
| Magnolia-Green Acres Subdivision | Des Peres, LA | 1,575 | 34 | - |
| Morrow Water System Inc | Morrow, LA | 1,572 | 2 | - |
| Cheniere Drew South Water System | West Monroe, LA | 1,563 | 68 | - |
| Utilities Inc - Quail Ridge Subdivision | Mandeville, LA | 1,563 | 13 | - |
| Village of Forest Water System | Forest, LA | 1,560 | 11 | - |
| Chatham Water System | Chatham, LA | 1,557 | 635 | - |
| Frost Town Water System | Calhoun, LA | 1,551 | 26 | - |
| Gil-Gal Water System | Minden, LA | 1,551 | 9 | - |
| Diversion Water- Water Front West | Prairieville, LA | 1,548 | 36 | - |
| Town of Cheneyville Water System | Cheneyville, LA | 1,531 | 75 | - |
| Village of Harrisonburg Water System | Harrisonburg, LA | 1,530 | 197 | - |
| Hico Water System | Dubach, LA | 1,530 | 424 | - |
| Town of Lecompte (Lawco) | Baton Rouge, LA | 1,527 | 4 | - |
| North Iberville Water System | Plaquemine, LA | 1,524 | 13 | Clean |
| Roseland Water System | Roseland, LA | 1,521 | 118 | - |
| Campti Water System | Campti, LA | 1,515 | 93 | - |
| Town of Elton Water System | Elton, LA | 1,512 | 119 | - |
| Marion Water System | Marion, LA | 1,512 | 518 | - |
| Cameron Parish Ww District 10 | Johnson Bayou, LA | 1,509 | 7 | - |
| Village of Anacoco | Anacoco, LA | 1,506 | 24 | - |
| Sarepta Water Works District | Sarepta, LA | 1,500 | 51 | - |
| Keithville Elementary and Middle School | Shreveport, LA | 1,500 | 41 | - |
| Exxonmobil Baton Rouge Chemical Plant | Baton Rouge, LA | 1,500 | 18 | - |
| Shongaloo Water System | Shongaloo, LA | 1,485 | 20 | - |
| Ile Des Cannes Water System | Duson, LA | 1,476 | 2 | - |
| Hilly-Greenwood Water System | Ruston, LA | 1,476 | 20 | - |
| Grayson Water System | Grayson, LA | 1,461 | 75 | - |
| East Desoto Water System | Mansfield, LA | 1,455 | 365 | - |
| Lpwdn la Neuville Holiday Subdivision WS | Lafayette, LA | 1,455 | 0 | - |
| Dixie Overland Water System | Minden, LA | 1,455 | 47 | - |
| South Oakdale Water System | Oakdale, LA | 1,434 | 20 | - |
| Summerville Water System | Jena, LA | 1,425 | 23 | Clean |
| Ward 6 Water Association of Rapides | Glenmora, LA | 1,410 | 32 | - |
| Germantown Water System | Minden, LA | 1,410 | 62 | - |
| Sardis Water System | Gilbert, LA | 1,404 | 707 | - |
| Basf Corporation | Geismar, LA | 1,391 | 25 | - |
| Fordoche, Town Of | Fordoche, LA | 1,380 | 15 | - |
| Cotton Valley Water System | Cotton Valley, LA | 1,380 | 252 | - |
| Bayou Pierre Water System | Coushatta, LA | 1,371 | 104 | - |
| Diversion Water River Highlands | Prairieville, LA | 1,356 | 22 | - |
| Magnolia-Monterey Subdivision | Des Peres, LA | 1,356 | 39 | - |