Mississippi water quality by county
82 counties with public water systems. Pick a county to see every system that serves it.
| County | Active systems | People served | Share with violations, 3 yr | Serious violators | Health flags |
|---|---|---|---|---|---|
| Adams County | 8 | 32,826 | 0 | 1 | |
| Alcorn County | 8 | 39,066 | 0 | 0 | |
| Amite County | 10 | 11,211 | 0 | 0 | |
| Attala County | 14 | 22,247 | 0 | 1 | |
| Benton County | 6 | 5,717 | 0 | 0 | |
| Bolivar County | 29 | 37,727 | 0 | 2 | |
| Calhoun County | 17 | 18,477 | 0 | 0 | |
| Carroll County | 6 | 10,203 | 0 | 0 | |
| Chickasaw County | 12 | 19,833 | 0 | 0 | |
| Choctaw County | 12 | 9,708 | 0 | 0 | |
| Claiborne County | 7 | 12,936 | 0 | 0 | |
| Clarke County | 12 | 15,146 | 0 | 0 | |
| Clay County | 8 | 24,073 | 0 | 0 | |
| Coahoma County | 18 | 24,296 | 0 | 0 | |
| Copiah County | 17 | 30,111 | 0 | 1 | |
| Covington County | 10 | 15,574 | 0 | 0 | |
| DeSoto County | 24 | 204,561 | 0 | 0 | |
| Forrest County | 16 | 89,526 | 0 | 0 | |
| Franklin County | 14 | 8,883 | 0 | 0 | |
| George County | 10 | 16,008 | 0 | 0 | |
| Greene County | 7 | 10,871 | 0 | 1 | |
| Grenada County | 16 | 32,487 | 0 | 1 | |
| Hancock County | 22 | 56,970 | 0 | 0 | |
| Harrison County | 52 | 193,791 | 0 | 1 | |
| Hinds County | 30 | 298,341 | 2 | 1 | |
| Holmes County | 21 | 21,350 | 0 | 1 | |
| Humphreys County | 11 | 9,201 | 0 | 0 | |
| Issaquena County | 3 | 1,452 | 0 | 1 | |
| Itawamba County | 9 | 23,348 | 0 | 0 | |
| Jackson County | 36 | 149,331 | 0 | 1 | |
| Jasper County | 16 | 26,912 | 0 | 0 | |
| Jefferson County | 7 | 8,591 | 0 | 0 | |
| Jefferson Davis County | 8 | 14,040 | 0 | 0 | |
| Jones County | 23 | 70,865 | 0 | 0 | |
| Kemper County | 12 | 12,295 | 0 | 0 | |
| Lafayette County | 24 | 74,600 | 0 | 0 | |
| Lamar County | 11 | 65,838 | 0 | 0 | |
| Lauderdale County | 14 | 80,013 | 0 | 0 | |
| Lawrence County | 11 | 12,367 | 0 | 0 | |
| Leake County | 13 | 22,457 | 0 | 0 | |
| Lee County | 25 | 86,885 | 0 | 0 | |
| Leflore County | 17 | 31,683 | 0 | 0 | |
| Lincoln County | 10 | 34,845 | 0 | 0 | |
| Lowndes County | 14 | 67,039 | 0 | 0 | |
| Madison County | 17 | 129,844 | 0 | 0 | |
| Marion County | 12 | 24,060 | 0 | 0 | |
| Marshall County | 13 | 24,542 | 0 | 2 | |
| Monroe County | 13 | 41,263 | 0 | 0 | |
| Montgomery County | 17 | 13,687 | 0 | 0 | |
| Neshoba County | 6 | 24,485 | 0 | 0 | |
| Newton County | 11 | 21,475 | 0 | 1 | |
| Noxubee County | 9 | 11,464 | 0 | 1 | |
| Oktibbeha County | 24 | 69,436 | 0 | 0 | |
| Panola County | 32 | 34,259 | 0 | 0 | |
| Pearl River County | 19 | 54,753 | 0 | 0 | |
| Perry County | 11 | 10,012 | 0 | 1 | |
| Pike County | 17 | 37,488 | 0 | 0 | |
| Pontotoc County | 12 | 36,716 | 0 | 0 | |
| Prentiss County | 12 | 31,944 | 0 | 0 | |
| Quitman County | 11 | 6,801 | 0 | 1 | |
| Rankin County | 36 | 190,366 | 0 | 0 | |
| Scott County | 14 | 33,695 | 0 | 0 | |
| Sharkey County | 5 | 3,904 | 0 | 0 | |
| Simpson County | 16 | 35,130 | 0 | 0 | |
| Smith County | 13 | 12,913 | 1 | 0 | |
| Stone County | 11 | 15,180 | 0 | 0 | |
| Sunflower County | 14 | 27,036 | 0 | 2 | |
| Tallahatchie County | 16 | 12,959 | 0 | 0 | |
| Tate County | 19 | 17,289 | 1 | 2 | |
| Tippah County | 12 | 27,618 | 0 | 0 | |
| Tishomingo County | 11 | 24,936 | 0 | 0 | |
| Tunica County | 3 | 12,248 | 1 | 0 | |
| Union County | 12 | 26,974 | 0 | 0 | |
| Walthall County | 6 | 19,772 | 0 | 0 | |
| Warren County | 7 | 56,140 | 0 | 0 | |
| Washington County | 14 | 47,415 | 0 | 0 | |
| Wayne County | 7 | 21,095 | 2 | 0 | |
| Webster County | 12 | 13,030 | 0 | 0 | |
| Wilkinson County | 9 | 11,069 | 0 | 0 | |
| Winston County | 11 | 20,115 | 0 | 0 | |
| Yalobusha County | 20 | 15,309 | 0 | 0 | |
| Yazoo County | 18 | 25,085 | 0 | 0 |
under 30% 30 to 59% 60% and over
About this data
Share with violations counts any violation in the past three years, including monitoring and reporting lapses. Counts cover active systems; systems serving more than one county are counted in each.
Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Mississippi records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet. Retrieved from ECHO on Oct 11, 2026.