Total Haloacetic Acids (HAA5) violations in Illinois
382 active public water systems in Illinois had a Total Haloacetic Acids (HAA5) violation in the past three years, 48 of them in the latest quarter of EPA's data. What Total Haloacetic Acids (HAA5) is and why it matters.
Systems with a Total Haloacetic Acids (HAA5) violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Vandalia Vandalia · Fayette County |
7,616 | 3 | 0 | |
|
Duquoin Du Quoin · Perry County |
7,169 | 6 | 2 | |
|
Raccoon Water Company Marion County |
7,080 | 1 | 0 | |
|
Stickney Stickney · Cook County |
6,902 | 2 | 0 | |
|
Winthrop Harbor Winthrop Harbor · Lake County |
6,565 | 4 | 3 | |
|
Carterville Carterville · Williamson County |
6,528 | 2 | 0 | |
|
Countryside Countryside · Cook County |
6,420 | 1 | 0 | |
|
Fort Massac Pwd Joppa · Massac County |
6,360 | 2 | 0 | |
|
Williamsville Williamsville · Sangamon County |
6,198 | 1 | 0 | |
|
Fairfield Fairfield · Wayne County |
5,998 | 4 | 0 | |
|
Pinckneyville Pinckneyville · Perry County |
5,804 | 4 | 0 | |
|
Park City Park City · Lake County |
5,425 | 3 | 0 | |
|
Robbins Robbins · Cook County |
5,415 | 6 | 3 | |
|
Mitchell Pwd Madison County |
5,253 | 1 | 0 | |
|
Eureka Eureka · Woodford County |
5,216 | 1 | 0 | |
|
Brighton Brighton · Macoupin County |
5,041 | 3 | 0 | |
|
Tuscola Tuscola · Douglas County |
4,875 | 4 | 1 | |
|
Athens Athens · Menard County |
4,575 | 4 | 0 | |
|
Lawrenceville Lawrenceville · Lawrence County |
4,524 | 7 | 2 | |
|
Fountain Water District Valmeyer · Monroe County |
4,350 | 3 | 0 | |
|
Woodhaven Lee County |
4,100 | 2 | 1 | |
|
Burnham Burnham · Cook County |
3,989 | 7 | 3 | |
|
Corinth Pwd Williamson County |
3,927 | 2 | 1 | |
|
Saline Valley Conservancy District Eldorado · Saline County |
3,921 | 2 | 0 | |
|
Rochester Rochester · Sangamon County |
3,856 | 1 | 0 | |
|
Rend Lake Inter-City Water System Franklin County |
3,650 | 4 | 0 | |
|
Riverwoods Riverwoods · Lake County |
3,618 | 1 | 0 | |
|
LE Roy Le Roy · McLean County |
3,498 | 4 | 2 | |
|
Tritownship Water District Highland · Madison County |
3,470 | 2 | 0 | |
|
Oregon Oregon · Ogle County |
3,449 | 4 | 1 | |
|
Lutheran General Hospital Cook County |
3,400 | 6 | 1 | |
|
Carlyle Carlyle · Clinton County |
3,373 | 4 | 1 | |
|
Galena Galena · Jo Daviess County |
3,308 | 4 | 1 | |
|
North East Marion County Water Cmpny Marion County |
3,220 | 1 | 0 | |
|
Sleepy Hollow Sleepy Hollow · Kane County |
3,100 | 1 | 0 | |
|
West Prairie Water Company Douglas County |
3,073 | 1 | 0 | |
|
Christopher Christopher · Franklin County |
3,072 | 2 | 0 | |
|
Lakeside Pwd Jackson County |
3,065 | 4 | 0 | |
|
Marquette Heights Marquette Heights · Tazewell County |
2,974 | 2 | 0 | |
|
Fmc Water Company Marion County |
2,945 | 1 | 0 | |
|
Arcola Arcola · Douglas County |
2,927 | 4 | 0 | |
|
McLeansboro Mcleansboro · Hamilton County |
2,812 | 5 | 4 | |
|
Bridgeport Bridgeport · Lawrence County |
2,572 | 4 | 0 | |
|
Sesser Sesser · Franklin County |
2,556 | 1 | 0 | |
|
Carthage Hancock County |
2,510 | 1 | 0 | |
|
Galva Galva · Henry County |
2,449 | 1 | 0 | |
|
Ewing-Ina Water Commission Franklin County |
2,393 | 2 | 0 | |
|
Dawson Dawson · Sangamon County |
2,375 | 5 | 1 | |
|
White Hall White Hall · Greene County |
2,313 | 5 | 0 | |
|
Elwood Elwood · Will County |
2,229 | 3 | 1 |
About this data
A system is counted once if any of its violations in the past three years involved Total Haloacetic Acids (HAA5), including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Total Haloacetic Acids (HAA5) 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 Illinois 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.