| Belk Water System | Belk, AL | 894 | 10 | - |
| Midway Water Works | Midway, AL | 867 | 45 | - |
| Allgood Water Works, Town Of | Allgood, AL | 861 | 25 | - |
| Reece City (Town Of) | Attalla, AL | 861 | 51 | - |
| Jcg Foods of Alabama LLC | Collinsville, AL | 850 | 81 | - |
| Farley Nuclear Plant | Birmingham, AL | 850 | 17 | - |
| Red Level Water Works | Red Level, AL | 846 | 51 | - |
| Choctaw-Edna Water Authority, Inc. | Pennington, AL | 819 | 23 | - |
| Twin Water Authority | Guin, AL | 804 | 113 | - |
| Gantt Water System | Gantt, AL | 801 | 7 | - |
| Wayne Farms LLC | Enterprise, AL | 800 | 131 | - |
| Rutledge Water Works | Rutledge, AL | 789 | 97 | - |
| Garden City Water Department | Garden City, AL | 780 | 24 | - |
| International Paper Company, | Selma, AL | 750 | 23 | - |
| St Stephens Water System | St. Stephens, AL | 735 | 3 | - |
| Kennedy Water Works Board | Kennedy, AL | 723 | 2 | - |
| Lockhart Water Works | Lockhart, AL | 720 | 10 | - |
| Tyson Farm, Inc., Blount Co. | Blountsville, AL | 700 | 12 | - |
| Westrock Coated Board, LLC | Phenix City, AL | 700 | 117 | - |
| Basf Corporation | McIntosh, AL | 700 | 10 | - |
| Daviston Water System, Town Of | Daviston, AL | 693 | 42 | - |
| Hobson Water System | Chatom, AL | 663 | 7 | - |
| Mt Andrew Water Authority | Midway, AL | 660 | 43 | Clean |
| Blue Springs Water Works | Clio, AL | 636 | 18 | - |
| Hobson City Water System | Hobson City, AL | 633 | 85 | - |
| International Paper, Prattville Mill | Prattville, AL | 600 | 64 | - |
| Pilgrims Pride Corporation | Enterprise, AL | 600 | 18 | - |
| Water Works, Inc. | Bessemer, AL | 594 | 93 | - |
| Pilgrim-Providence Water Authority | Ramer, AL | 588 | 9 | - |
| Edwardsville Water & Fire Pro Authority | Edwardsville, AL | 585 | 72 | - |
| Cheaha State Park | Delta, AL | 570 | 38 | - |
| Cuba Water Board | Cuba, AL | 570 | 20 | - |
| Goshen Water Works Dist System | Goshen, AL | 546 | 91 | - |
| Wills Cross Roads Water System | Shorterville, AL | 540 | 22 | - |
| Fulton, Utilities Board of the Town Of | Fulton, AL | 534 | 14 | - |
| Akron Water Department, Town Of | Akron, AL | 513 | 75 | - |
| Repton Water Works | Repton, AL | 510 | 170 | - |
| Sanford Water System | Andalusia, AL | 498 | 11 | - |
| Dozier Water Works (Town Of) | Dozier, AL | 495 | 24 | - |
| Avon Water System | Ashford, AL | 495 | 6 | - |
| Sweet Water, the Ww & Sb of the Town Of | Sweetwater, AL | 465 | 60 | - |
| East Lowndes Water Association, Inc. | Columbus, AL | 459 | 0 | - |
| Heath Water System | Andalusia, AL | 450 | 10 | - |
| Waldo, Town Of | Talladega, AL | 450 | 104 | - |
| Orrville Water Department, Town Of | Orville, AL | 435 | 48 | - |
| Detroit Water Works | Detroit, AL | 435 | 73 | - |
| Boise Cascade Wood Products, LLC | Chapman, AL | 414 | 18 | - |
| Gordon, Town Of | Gordon, AL | 414 | 44 | - |
| Faunsdale Water Works | Faunsdale, AL | 414 | 100 | - |
| Lake Mitchell Water, Incorporated | Rockford, AL | 390 | 40 | - |