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 |
|---|---|---|---|---|
|
Reform Water Association Choctaw County |
1,742 | 1 | 0 | |
|
Duffee Water Association Newton County |
1,716 | 1 | 0 | |
|
Hwy 30 West Water Association Union County |
1,716 | 1 | 0 | |
|
Pope-Courtland W/a-North Panola County |
1,713 | 3 | 0 | |
|
City of Mound Bayou Mound Bayou · Bolivar County |
1,711 | 6 | 0 | |
|
City of Rosedale Rosedale · Bolivar County |
1,708 | 4 | 0 | |
|
Sweet Home Water & Sewer Dist Holmes County |
1,695 | 3 | 1 | |
|
Beaver Meadow Waterworks Association Jasper County |
1,687 | 2 | 0 | |
|
Lily Rose W/a #1 Jefferson Davis County |
1,675 | 1 | 0 | |
|
North West Kemper W/a #4 Kemper County |
1,671 | 1 | 0 | |
|
Spring Hill Water Assn. Pearl River County |
1,642 | 3 | 0 | |
|
Town of Shaw Bolivar County |
1,639 | 2 | 0 | |
|
Highway 98 East Water Assn. Marion County |
1,632 | 2 | 0 | |
|
Central Yazoo W/a #5 Yazoo County |
1,618 | 1 | 0 | |
|
NW Kemper W/a #1-Preston Kemper County |
1,618 | 1 | 0 | |
|
City of Lexington Lexington · Holmes County |
1,600 | 1 | 0 | |
|
Town of State Line Greene County |
1,600 | 3 | 0 | |
|
Diberville High School Harrison County |
1,599 | 2 | 0 | |
|
Town of Ackerman Choctaw County |
1,594 | 4 | 0 | |
|
Toccopola Water Association #2 Pontotoc County |
1,592 | 4 | 1 | |
|
Town of Pickens Holmes County |
1,587 | 1 | 0 | |
|
Troy Water Association Pontotoc County |
1,580 | 1 | 0 | |
|
Marydell Water Association Leake County |
1,573 | 2 | 0 | |
|
West Marion Water Association Marion County |
1,571 | 1 | 0 | |
|
Copiah W/a Gallman Copiah County |
1,566 | 4 | 0 | |
|
Houston-Palestine Water Assoc Itawamba County |
1,563 | 3 | 0 | |
|
East Oxford Water Association Lafayette County |
1,544 | 2 | 0 | |
|
Ethel Rural Water Association Attala County |
1,544 | 1 | 0 | |
|
Talking Warrior Water Assn #1 Oktibbeha County |
1,539 | 2 | 0 | |
|
Tallahala W/a-Garlandsville Jasper County |
1,534 | 1 | 0 | |
|
New Candler Water Association Prentiss County |
1,531 | 2 | 0 | |
|
J P Utility Dist #2 Jones County |
1,521 | 1 | 0 | |
|
Sardis Lake Community W/a Panola County |
1,521 | 1 | 0 | |
|
Town of New Houlka Chickasaw County |
1,515 | 2 | 0 | |
|
Town of Summit Pike County |
1,502 | 1 | 0 | |
|
Delta State University Bolivar County |
1,500 | 4 | 1 | |
|
Town of Shannon Lee County |
1,500 | 2 | 1 | |
|
Prvwsd-Main Harbor Madison County |
1,497 | 2 | 0 | |
|
Acl Water Association #1 Rankin County |
1,492 | 2 | 0 | |
|
Siloam W/a #6-Una System Clay County |
1,489 | 3 | 1 | |
|
Town of Terry Hinds County |
1,486 | 3 | 0 | |
|
Sontag-Wanilla Lawrence County |
1,484 | 1 | 0 | |
|
French Camp W/a #1 Choctaw County |
1,478 | 2 | 1 | |
|
East Chickasaw W/a #1 Chickasaw County |
1,463 | 1 | 0 | |
|
Central W/a-Arlington Neshoba County |
1,460 | 1 | 0 | |
|
Enon-Locke-Curtis Water Assn Panola County |
1,460 | 2 | 0 | |
|
Town of Walnut Tippah County |
1,449 | 1 | 0 | |
|
Wellsgate Lafayette County |
1,447 | 5 | 1 | |
|
Savannah Water Association #1 Webster County |
1,434 | 3 | 1 | |
|
Simpson Water Association #1 Choctaw County |
1,426 | 1 | 0 |
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.