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 |
|---|---|---|---|---|
|
New Creek Water Association New Creek (newcreek) · Mineral County |
3,163 | 3 | 2 | |
|
Follansbee Municipal Follansbee · Brooke County |
3,145 | 2 | 0 | |
|
Clinton Water Assoc Kingwood Pike Morgantown · Monongalia County |
3,100 | 2 | 1 | |
|
Branchland Midkiff PSD Branchland · Lincoln County |
3,077 | 3 | 0 | |
|
Bethlehem Bethlehem · Ohio County |
2,968 | 4 | 0 | |
|
Welch City of Welch · McDowell County |
2,907 | 6 | 1 | |
|
Elkins Road PSD Buckhannon · Upshur County |
2,890 | 2 | 1 | |
|
Mingo County PSD Pigeon Creek Varney · Mingo County |
2,877 | 7 | 4 | |
|
Mount Hope Water Assoc Buckhannon · Upshur County |
2,870 | 3 | 1 | |
|
Shortline PSD Wallace · Harrison County |
2,727 | 4 | 3 | |
|
Kanawha Falls PSD Gauley Bridge · Fayette County |
2,547 | 14 | 3 | |
|
River Bend Membership Corporation Falling Waters · Berkeley County |
2,500 | 7 | 1 | |
|
Richwood Water Dept Richwood · Nicholas County |
2,480 | 10 | 3 | |
|
Pleasants CO PSD St. Marys · Pleasants County |
2,357 | 6 | 2 | |
|
Harrisville Harrisville · Ritchie County |
2,347 | 3 | 1 | |
|
Lincoln PSD Route 3 Griffithsville · Lincoln County |
2,226 | 8 | 4 | |
|
Little Creek PSD Fairmont · Marion County |
2,180 | 2 | 1 | |
|
Mountain Top PSD Mt Storm · Grant County |
2,072 | 6 | 1 | |
|
Marlinton Town of Marlinton · Pocahontas County |
1,930 | 5 | 2 | |
|
Gilmer County PSD Federal Prison Glenville · Gilmer County |
1,884 | 4 | 0 | |
|
Pocahontas CO PSD Cheat Mountain Water Snowshoe Resort · Pocahontas County |
1,867 | 2 | 1 | |
|
Gilbert Water Works Gilbert · Mingo County |
1,840 | 4 | 2 | |
|
Northrup Grumman Innovation Systems, INC Rocket Center · Mineral County |
1,705 | 6 | 1 | |
|
Oakland PSD New Cumberland · Hancock County |
1,659 | 6 | 3 | |
|
New Haven Water Dept New Haven · Mason County |
1,649 | 8 | 2 | |
|
Gary City of Gary · McDowell County |
1,633 | 13 | 5 | |
|
Chapmanville, Town of Chapmanville · Logan County |
1,589 | 3 | 0 | |
|
Leadsville PSD Elkins · Randolph County |
1,536 | 4 | 3 | |
|
Pennsboro Pennsboro · Ritchie County |
1,532 | 4 | 2 | |
|
Lumberport Town of Lumberport · Harrison County |
1,519 | 6 | 2 | |
|
Jane Lew PSD Jane Lew · Lewis County |
1,440 | 4 | 3 | |
|
Haymond PSD Grafton · Taylor County |
1,393 | 7 | 3 | |
|
Rainelle Water Dept Rainelle · Greenbrier County |
1,381 | 8 | 3 | |
|
Big Bend PSD Talcott · Summers County |
1,350 | 4 | 0 | |
|
New Cumberland, City of New Cumberland · Hancock County |
1,326 | 6 | 3 | |
|
Taylor County PSD Grafton · Taylor County |
1,322 | 8 | 3 | |
|
I Heart Church Bradley · Raleigh County |
1,000 | 6 | 3 | |
|
Clover PSD Clover · Roane County |
976 | 3 | 2 | |
|
Cameron Water Cameron · Marshall County |
962 | 7 | 0 | |
|
Davis Water Works Davis · Tucker County |
952 | 6 | 2 | |
|
Carpendale, Town of Ridgeley (rr Name Ridgely) · Mineral County |
937 | 1 | 0 | |
|
Tri County Clarksburg Harrison County |
919 | 7 | 3 | |
|
Rocky Glen Manufactured Housing Communit Martinsburg · Berkeley County |
861 | 5 | 3 | |
|
Union Town of Union · Monroe County |
758 | 2 | 0 | |
|
Thomas City of Thomas · Tucker County |
753 | 8 | 2 | |
|
Town of Capon Bridge INC Capon Bridge · Hampshire County |
700 | 4 | 3 | |
|
Rowlesburg Water Works Rowlesburg · Preston County |
680 | 9 | 2 | |
|
Hartford Town of Hartford City (corporate Name · Mason County |
675 | 5 | 2 | |
|
Mingo CO PSD Ragland District Ragland · Mingo County |
621 | 8 | 4 | |
|
Worthington Town of Worthington · Marion County |
598 | 6 | 3 |
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.