TTHM (Total Trihalomethanes) violations in Indiana
94 active public water systems in Indiana had a TTHM (Total Trihalomethanes) violation in the past three years, 6 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 |
|---|---|---|---|---|
|
Westport Water Company Westport · Decatur County |
1,725 | 6 | 0 | |
|
Morocco Water Department Morocco · Newton County |
1,200 | 5 | 1 | |
|
Van Buren Municipal Utilities Van Buren · Grant County |
864 | 2 | 1 | |
|
Camden Water Utility Camden · Carroll County |
611 | 1 | 0 | |
|
Glenwood Water Works Glenwood · Rush County |
313 | 2 | 1 | |
|
Salt Creek Services, Inc. Bloomington · Monroe County |
90 | 5 | 1 | |
|
City of Lawrence Utilities Lawrence · Marion County |
49,000 | 1 | 0 | |
|
Bargersville Water Department Bargersville · Johnson County |
34,418 | 3 | 0 | |
|
Crown Point Water Works Crown Point · Lake County |
30,000 | 1 | 0 | |
|
East Chicago Water Works East Chicago · Lake County |
26,370 | 3 | 0 | |
|
New Castle Utilities New Castle · Henry County |
19,880 | 3 | 0 | |
|
Griffith Water Department Griffith · Lake County |
16,893 | 2 | 0 | |
|
New Haven Water Department New Haven · Allen County |
15,700 | 3 | 0 | |
|
Huntertown Water Works Huntertown · Allen County |
14,058 | 1 | 0 | |
|
Princeton Water Department Princeton · Gibson County |
10,875 | 4 | 1 | |
|
Columbia City Water Department Columbia City · Whitley County |
9,892 | 1 | 0 | |
|
Cuii Twin Lakes Crown Point · Lake County |
8,000 | 1 | 0 | |
|
Linton Municipal Water Utility Linton · Greene County |
7,430 | 1 | 0 | |
|
Rushville City Utility Rushville · Rush County |
6,800 | 2 | 0 | |
|
Mount Vernon Water Works Mount Vernon · Posey County |
6,426 | 3 | 0 | |
|
Rochester Water Department Rochester · Fulton County |
6,218 | 1 | 0 | |
|
Gas City Water Department Gas City · Grant County |
6,000 | 3 | 1 | |
|
Monticello Water Works Monticello · White County |
5,300 | 1 | 0 | |
|
Lawrenceburg Municipal Utilities Lawrenceburg · Dearborn County |
5,000 | 1 | 0 | |
|
Whiting Water Department Whiting · Lake County |
4,900 | 1 | 0 | |
|
Cedar Lake Water Works Cedar Lake · Lake County |
4,600 | 8 | 0 | |
|
Bicknell Municipal Utilities Bicknell · Knox County |
4,064 | 3 | 1 | |
|
Northwest Jasper Regional Water District Demotte · Jasper County |
4,054 | 1 | 0 | |
|
Knox Water Works Knox · Starke County |
3,700 | 1 | 0 | |
|
East Monroe Water Corporation Bloomington · Monroe County |
3,648 | 1 | 0 | |
|
Cordry Sweetwater Conservancy District Nineveh · Brown County |
3,425 | 3 | 0 | |
|
Middlebury Water Department Middlebury · Elkhart County |
3,420 | 2 | 0 | |
|
Nashville Water Department Nashville · Brown County |
3,315 | 2 | 0 | |
|
Western School Corporation Russiaville · Howard County |
3,010 | 3 | 0 | |
|
Brown County State Park Nashville · Brown County |
2,836 | 2 | 0 | |
|
Indiana Gateway Industrial Park Cambridge City · Wayne County |
2,125 | 2 | 0 | |
|
Jonesboro Water Department Jonesboro · Grant County |
2,034 | 3 | 2 | |
|
Frankton Water Works Frankton · Madison County |
1,800 | 2 | 0 | |
|
Kingsford Heights Water Kingsford Heights · LaPorte County |
1,800 | 1 | 0 | |
|
Monon Water Utility Monon · White County |
1,700 | 5 | 0 | |
|
Dale Water Works Dale · Spencer County |
1,637 | 2 | 1 | |
|
Brooklyn Water Works Brooklyn · Morgan County |
1,600 | 4 | 1 | |
|
Haubstadt Water Department Haubstadt · Gibson County |
1,600 | 3 | 0 | |
|
Eaton Water Works Eaton · Delaware County |
1,595 | 2 | 0 | |
|
Trafalgar Water Department Trafalgar · Johnson County |
1,490 | 2 | 0 | |
|
South 43 Water Association, Inc. Greencastle · Putnam County |
1,431 | 1 | 0 | |
|
Monroeville Water Works Monroeville · Allen County |
1,400 | 2 | 0 | |
|
Aqua Indiana Water Company Lake County |
1,350 | 1 | 0 | |
|
Oolitic Water Works Oolitic · Lawrence County |
1,315 | 2 | 0 | |
|
Converse Water Works Converse · Miami County |
1,265 | 2 | 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 Indiana 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.