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 |
|---|---|---|---|---|
|
Retz Addn Improvement Association LaSalle County |
168 | 3 | 0 | |
|
Cooksville Cooksville · McLean County |
157 | 2 | 0 | |
|
Kolb Lena Cheese Company Jo Daviess County |
150 | 5 | 0 | |
|
Campus Campus · Livingston County |
149 | 3 | 0 | |
|
Hazelwood 4th Addition Henry County |
140 | 3 | 2 | |
|
Meadows Mennonite Home McLean County |
140 | 8 | 1 | |
|
ST Marys School Bored Well Peoria County |
140 | 9 | 1 | |
|
West Brooklyn West Brooklyn · Lee County |
131 | 3 | 1 | |
|
Eagarville Eagerville · Macoupin County |
127 | 8 | 0 | |
|
Riverside Mhp, LLC Rock Falls · Whiteside County |
120 | 4 | 0 | |
|
Edelstein Water Coop Peoria County |
113 | 2 | 1 | |
|
Prairieview Lutheran Home Danforth · Iroquois County |
113 | 2 | 0 | |
|
East Lynn Community Water System Vermilion County |
112 | 6 | 3 | |
|
TC Industries McHenry County |
100 | 3 | 0 | |
|
Eberts 3rd Addition Rock Island County |
99 | 4 | 2 | |
|
Diocese of Rockford Winnebago County |
90 | 3 | 0 | |
|
Timber Ridge Sbdv Henry County |
90 | 3 | 2 | |
|
Trinity Lutheran School Randolph County |
80 | 9 | 1 | |
|
Prairieview Jr. High School Champaign County |
67 | 6 | 1 | |
|
Rooks Creek Elementary School Livingston County |
66 | 10 | 1 | |
|
Cropsey Mutual Water Association McLean County |
65 | 7 | 2 | |
|
Rend Lake Mobile Home Park Benton · Franklin County |
65 | 2 | 1 | |
|
Egyptian Trail Water Corp Douglas County |
64 | 2 | 0 | |
|
Oaklane Sbdv LaSalle County |
63 | 1 | 0 | |
|
Edward Hines JR V a Hospital Cook County |
60 | 2 | 0 | |
|
Chigakwa Park Estates Rock Island County |
53 | 4 | 1 | |
|
Acorn Acres MHP Olney · Richland County |
52 | 7 | 0 | |
|
Road Ranger 132 Champaign County |
45 | 6 | 2 | |
|
Carmel Montessori Academy DuPage County |
40 | 6 | 1 | |
|
Dayspring Bible College Mundelein · Lake County |
30 | 1 | 0 | |
|
Anna-Jonesboro Water Commission Union County |
28 | 1 | 0 | |
|
Gateway Regional Water Company Clinton County |
1 | 1 | 0 |
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.