TTHM (Total Trihalomethanes) violations in Mississippi
501 active public water systems in Mississippi had a TTHM (Total Trihalomethanes) violation in the past three years, 11 of them in the latest quarter of EPA's data. What TTHM (Total Trihalomethanes) is and why it matters.
Systems with a TTHM (Total Trihalomethanes) violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Town of Hickory Flat Benton County |
1,423 | 1 | 0 | |
|
Oak Grove Water Assn Jones County |
1,405 | 1 | 0 | |
|
Thrasher Water Association Prentiss County |
1,400 | 2 | 1 | |
|
Town of Boyle Bolivar County |
1,400 | 1 | 0 | |
|
Town of Monticello Lawrence County |
1,400 | 1 | 0 | |
|
Town of Coldwater Tate County |
1,381 | 2 | 0 | |
|
Harmony Ridge Water Assn Copiah County |
1,380 | 1 | 0 | |
|
Edinburg Domestic Water Association Leake County |
1,375 | 1 | 0 | |
|
S E Greene Water Authority Greene County |
1,375 | 2 | 1 | |
|
Acona Water Association #1 Holmes County |
1,373 | 3 | 0 | |
|
Paulding Water Association Jasper County |
1,363 | 1 | 0 | |
|
Town of Renova Bolivar County |
1,357 | 6 | 0 | |
|
Town of Kilmichael Montgomery County |
1,341 | 5 | 0 | |
|
Hilton Heights Water Assn #1 Yazoo County |
1,336 | 1 | 0 | |
|
Town of Jumpertown Prentiss County |
1,300 | 1 | 0 | |
|
Bond Water Association #1 Winston County |
1,299 | 1 | 0 | |
|
Ellison Ridge Water Assn Winston County |
1,287 | 1 | 0 | |
|
West Madison Utl Dist Madison County |
1,287 | 1 | 0 | |
|
Rose Hill Water Association Jasper County |
1,280 | 1 | 0 | |
|
Lily Rose W/a #2 Jefferson Davis County |
1,275 | 1 | 0 | |
|
North Covington W/a-North Covington County |
1,259 | 1 | 0 | |
|
Homestead Water Association Scott County |
1,251 | 1 | 0 | |
|
Copiah W/a Bayou Pierre #1 Copiah County |
1,246 | 4 | 0 | |
|
Kossuth W/a #2-Bethlehem Alcorn County |
1,245 | 1 | 0 | |
|
West Holmes Water Association Holmes County |
1,245 | 3 | 0 | |
|
East Chickasaw W/a #2 Chickasaw County |
1,238 | 1 | 0 | |
|
South Lowndes W/a Lowndes County |
1,230 | 3 | 0 | |
|
Gaines-Trace Water Association Monroe County |
1,214 | 1 | 0 | |
|
Possumneck-Carmack W/a Attala County |
1,214 | 1 | 0 | |
|
Sutter Water Service-Magnolia Springs Pass Christian · Harrison County |
1,201 | 1 | 0 | |
|
East MS Comm College-Golden TR Lowndes County |
1,200 | 2 | 0 | |
|
Eastside Water Association Hinds County |
1,200 | 3 | 1 | |
|
Town of Bassfield Jefferson Davis County |
1,199 | 1 | 0 | |
|
McNair-Stampley W/a #2 Jefferson County |
1,188 | 2 | 0 | |
|
Poplar Springs Water District Simpson County |
1,188 | 1 | 0 | |
|
Town of Goodman Holmes County |
1,188 | 3 | 0 | |
|
Broadmoor Utilities, INC Adams County |
1,185 | 2 | 1 | |
|
Three Forks Water Association Tippah County |
1,185 | 1 | 0 | |
|
Campground Water Assn Lafayette County |
1,175 | 2 | 1 | |
|
Chapel Hill-Pleasant Grove W/a Oktibbeha County |
1,175 | 2 | 0 | |
|
Eureka Water Association Panola County |
1,172 | 1 | 0 | |
|
Coontail Water Association Monroe County |
1,170 | 1 | 0 | |
|
Town of Lambert Quitman County |
1,167 | 5 | 1 | |
|
Central W/a-North Pearl River Neshoba County |
1,164 | 1 | 0 | |
|
Carnes Water Association Forrest County |
1,160 | 1 | 0 | |
|
McNair-Stampley W/a #1 Jefferson County |
1,148 | 3 | 1 | |
|
College Hill Water Assn Lafayette County |
1,146 | 1 | 0 | |
|
Nanih-Waiya Water Association Winston County |
1,127 | 1 | 0 | |
|
Cross-Roads Water Association Calhoun County |
1,125 | 2 | 1 | |
|
Town of Metcalfe Washington County |
1,125 | 4 | 2 |
About this data
A system is counted once if any of its violations in the past three years involved TTHM (Total Trihalomethanes), including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not TTHM (Total Trihalomethanes) alone.
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.