Combined Radium (-226 and -228) violations in Illinois
76 active public water systems in Illinois had a Combined Radium (-226 and -228) violation in the past three years, 11 of them in the latest quarter of EPA's data. What Combined Radium (-226 and -228) is and why it matters.
Systems with a Combined Radium (-226 and -228) violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Scales Mound Scales Mound · Jo Daviess County |
436 | 2 | 1 | |
|
Beason Chestnut Pwd Logan County |
435 | 2 | 0 | |
|
Des Plaines MHP Cook County |
405 | 2 | 1 | |
|
Royal Melbourne Homeowners Asn Long Grove · Lake County |
382 | 2 | 0 | |
|
Whispering Lakes Water System, Inc. Lake County |
375 | 1 | 0 | |
|
Ruma Ruma · Randolph County |
341 | 2 | 1 | |
|
Fields Hill Improvement Association LaSalle County |
312 | 7 | 4 | |
|
IL American-Valentine Lake County |
252 | 3 | 0 | |
|
Country Acres MHP (la Salle County) LaSalle County |
222 | 1 | 0 | |
|
Sylvan Lake 1st Subdivision Lake County |
210 | 6 | 0 | |
|
Briarcrest Sbdv Homeowners Association Lake County |
207 | 2 | 1 | |
|
The Preserve at Long Grove Long Grove · Lake County |
204 | 5 | 1 | |
|
Reddick Kankakee County |
196 | 2 | 0 | |
|
Prairie Trails of Long Grove Lake County |
189 | 1 | 0 | |
|
Country Estates Subdivision Henry County |
188 | 5 | 2 | |
|
Willow Hill Willow Hill · Jasper County |
172 | 3 | 0 | |
|
Retz Addn Improvement Association LaSalle County |
168 | 3 | 0 | |
|
Duck Lake Well Owners Association Lake County |
141 | 4 | 2 | |
|
Winding Creek Estates Rock Island County |
120 | 3 | 0 | |
|
Unity Water Corporation Mercer County |
93 | 1 | 0 | |
|
Capron MHP Boone County |
90 | 4 | 0 | |
|
Heatherfield Subdivision Grundy County |
90 | 2 | 1 | |
|
Land and Wtr Assn LaSalle County |
83 | 2 | 0 | |
|
Phil-Aire Estates MHP Rockton · Winnebago County |
80 | 3 | 1 | |
|
Promontory Pointe Homeowners Association Long Grove · Lake County |
78 | 2 | 1 | |
|
Kinkaid Area Water System Jackson County |
1 | 2 | 0 |
About this data
A system is counted once if any of its violations in the past three years involved Combined Radium (-226 and -228), including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Combined Radium (-226 and -228) 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.