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 Hazlehurst Copiah County |
3,600 | 2 | 0 | |
|
Town of Guntown Lee County |
3,577 | 3 | 0 | |
|
East Quitman W/a Clarke County |
3,546 | 1 | 0 | |
|
City of Magee Magee · Simpson County |
3,526 | 3 | 1 | |
|
Quincy Water Association #1 Monroe County |
3,519 | 1 | 0 | |
|
Evergreen Water Association Rankin County |
3,462 | 2 | 0 | |
|
Jayess-Topeka-Tilton W/a Lawrence County |
3,450 | 1 | 0 | |
|
City of Union Newton County |
3,432 | 2 | 1 | |
|
Tallahala W/a-Antioch Jasper County |
3,427 | 1 | 0 | |
|
Mooreville Richmond #3 Lee County |
3,419 | 1 | 0 | |
|
Collinsville Water Assn Lauderdale County |
3,403 | 1 | 0 | |
|
City of Morton Morton · Scott County |
3,400 | 1 | 0 | |
|
City of Newton Newton · Newton County |
3,373 | 1 | 0 | |
|
Naval Construction Battal Ctr Harrison County |
3,347 | 1 | 0 | |
|
Glade Waterworks Assn Jones County |
3,340 | 1 | 0 | |
|
Columbus Air Force Base Lowndes County |
3,300 | 1 | 0 | |
|
Hub Water Association Marion County |
3,260 | 1 | 0 | |
|
Mooreville-Richmond W/a #2 Lee County |
3,200 | 1 | 0 | |
|
Central W/a-House Neshoba County |
3,186 | 1 | 0 | |
|
Rawls Springs Utility District Forrest County |
3,168 | 1 | 0 | |
|
City of Lucedale Lucedale · George County |
3,164 | 1 | 0 | |
|
Pelucia Rural W/a #2-Grav Hill Carroll County |
3,142 | 1 | 0 | |
|
Wren W/a Monroe County |
3,068 | 1 | 0 | |
|
Town of Port Gibson Claiborne County |
3,047 | 4 | 1 | |
|
Northeast Copiah Water Assn Copiah County |
3,020 | 1 | 0 | |
|
Moselle Water Association Jones County |
3,002 | 1 | 0 | |
|
Alcorn State University Claiborne County |
3,000 | 1 | 0 | |
|
Walls Water Association DeSoto County |
2,999 | 2 | 0 | |
|
Prvwsd-Twin Harbor Madison County |
2,973 | 2 | 0 | |
|
Freeny W/a #1 Leake County |
2,962 | 1 | 0 | |
|
Pattison W/a-West Claiborne County |
2,933 | 4 | 1 | |
|
Town of Bay Springs Jasper County |
2,925 | 1 | 0 | |
|
Magnolia Rural Water Assn Pike County |
2,922 | 9 | 0 | |
|
City of Collins Collins · Covington County |
2,921 | 2 | 0 | |
|
Woolmarket Village Estates Harrison County |
2,910 | 3 | 0 | |
|
Steele-Ringgold W/a #2 Scott County |
2,883 | 1 | 0 | |
|
N Central Amite Water Assn Amite County |
2,872 | 1 | 0 | |
|
Days Water Association DeSoto County |
2,825 | 4 | 0 | |
|
Good Hope Water Association Jefferson Davis County |
2,809 | 1 | 0 | |
|
Poor House W/a #1 Grenada County |
2,806 | 4 | 2 | |
|
City of Okolona Okolona · Chickasaw County |
2,800 | 1 | 0 | |
|
Meridian Naval Air Station Lauderdale County |
2,800 | 2 | 0 | |
|
City of Bruce Bruce · Calhoun County |
2,798 | 1 | 0 | |
|
City of Verona Verona · Lee County |
2,792 | 1 | 0 | |
|
North Hinds W/a #6-Shepherd Hills Hinds County |
2,785 | 2 | 0 | |
|
Town of Sallis Attala County |
2,785 | 1 | 0 | |
|
Town of Falkner Tippah County |
2,780 | 1 | 0 | |
|
Sharon Water Works Jones County |
2,769 | 1 | 0 | |
|
Hide-A-Way Lake Water System Pearl River County |
2,727 | 1 | 0 | |
|
Southwest Lauderdale W/a Lauderdale County |
2,724 | 3 | 1 |
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.