TTHM (Total Trihalomethanes) violations in West Virginia
143 active public water systems in West Virginia had a TTHM (Total Trihalomethanes) violation in the past three years, 32 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 |
|---|---|---|---|---|
|
Kenova Municipal Water Kenova · Wayne County |
11,192 | 3 | 2 | |
|
Milton Water Milton · Cabell County |
5,446 | 6 | 2 | |
|
Southwestern Water District Flemington · Taylor County |
5,363 | 6 | 3 | |
|
Shinnston City of Shinnston · Harrison County |
4,959 | 9 | 4 | |
|
Gauley River PSD Belva · Fayette County |
3,944 | 8 | 5 | |
|
Crum PSD Crum · Wayne County |
3,463 | 6 | 1 | |
|
Elizabeth Water Dept Elizabeth · Wirt County |
2,289 | 6 | 3 | |
|
Mingo County PSD Naugatuck Naugatuck · Mingo County |
2,159 | 10 | 5 | |
|
Green Valley Glenwood PSD Bulltail Princeton · Mercer County |
2,130 | 4 | 3 | |
|
Sistersville Municipal Water Sistersville · Tyler County |
1,892 | 8 | 3 | |
|
Tri-County Water Assoc Fairmont Boothsville · Marion County |
1,880 | 4 | 4 | |
|
Pleasant Hill P S D RT 16 District Five Forks · Calhoun County |
1,868 | 8 | 4 | |
|
Terra Alta Water Works Terra Alta · Preston County |
1,856 | 6 | 1 | |
|
Salem Water Board Salem · Harrison County |
1,630 | 4 | 4 | |
|
Franklin Municipality of Franklin · Pendleton County |
1,402 | 5 | 2 | |
|
Clay Water Dept Clay · Clay County |
1,232 | 10 | 2 | |
|
War Water Works City Realty War · McDowell County |
1,220 | 5 | 4 | |
|
Mount Zion P S D Grantsville · Calhoun County |
1,163 | 8 | 5 | |
|
West Logan Water CO Logan · Logan County |
908 | 8 | 5 | |
|
Pax Water Company Pax · Fayette County |
762 | 5 | 4 | |
|
Lester Municipal Water Works Lester · Raleigh County |
665 | 5 | 4 | |
|
Pine Grove Water Pine Grove · Wetzel County |
620 | 11 | 5 | |
|
Valley Grove Water Dept Valley Grove · Ohio County |
610 | 4 | 1 | |
|
Reedy Water Service Town of Reedy · Roane County |
480 | 7 | 5 | |
|
Gilmer CO PSD Route 33/119 Glenville · Gilmer County |
425 | 4 | 1 | |
|
Hutchinson Community Water Assoc Worthington · Marion County |
353 | 5 | 3 | |
|
Pocahontas County High School Marlinton · Pocahontas County |
334 | 10 | 3 | |
|
Brenton PSD Brenton · Wyoming County |
241 | 9 | 4 | |
|
Brooke County PSD Colliers · Brooke County |
240 | 3 | 3 | |
|
Shinnston Saltwell Road Saltwell · Harrison County |
205 | 6 | 2 | |
|
Rayford Acres Fairmont · Marion County |
194 | 4 | 3 | |
|
Mingo County PSD Delorme Delorme (rr Name For Edgarton) · Mingo County |
64 | 6 | 4 | |
|
Putnam P S D Scott Depot (rr Name Scott) · Putnam County |
26,410 | 4 | 1 | |
|
ST Albans Water St. Albans · Kanawha County |
13,758 | 4 | 2 | |
|
Lewisburg Lewisburg · Greenbrier County |
12,065 | 9 | 3 | |
|
Grafton City of Grafton · Taylor County |
6,333 | 4 | 2 | |
|
Bluewell PSD Bluewell · Mercer County |
6,216 | 3 | 2 | |
|
Clinton Water Assoc Route 119 Morgantown · Monongalia County |
5,733 | 4 | 1 | |
|
Mineral Wells PSD Mineralwells · Wood County |
5,674 | 7 | 1 | |
|
Wayne Water Town of Wayne · Wayne County |
5,519 | 6 | 2 | |
|
Point Pleasant Water Works Point Pleasant · Mason County |
5,146 | 12 | 4 | |
|
Follansbee Hooverson Heights Follansbee · Brooke County |
4,970 | 2 | 0 | |
|
Green Valley Glenwood PSD Glenwood Princeton · Mercer County |
4,914 | 3 | 2 | |
|
Huttonsville PSD Mill Creek · Randolph County |
4,758 | 4 | 1 | |
|
Marshall County PSD 4 Moundsville · Marshall County |
4,063 | 7 | 1 | |
|
Lincoln PSD Alum Creek · Lincoln County |
3,981 | 9 | 3 | |
|
White Sulphur Springs Water White Sulphur Springs · Greenbrier County |
3,845 | 4 | 0 | |
|
Midland PSD Elkins · Randolph County |
3,802 | 6 | 0 | |
|
Eastern Wyoming PSD Stephenson Wtp Mullens · Wyoming County |
3,616 | 8 | 4 | |
|
Greenbrier Hotel Corporation White Sulphur Springs · Greenbrier County |
3,280 | 8 | 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 West Virginia 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.