Illinois Water Quality
Tap water quality data for 10 cities and their water systems
All 10 Cities
Sorted by population served
Chicago
Utility serves 2.7M
Hardness183 ppm
LeadBelow limit
Violations15 (3yr)
Aurora
Utility serves 183K
Hardness323 ppm
LeadAbove limit
ViolationsNone
Joliet
Utility serves 169K
Hardness284 ppm
LeadAbove limit
Violations412 (3yr)
Naperville
Utility serves 155K
Hardness314 ppm
LeadBelow limit
Violations4 (3yr)
Champaign
Utility serves 151K
Hardness273 ppm
LeadBelow limit
ViolationsNone
Rockford
Utility serves 148K
Hardness324 ppm
LeadAbove limit
Violations15 (3yr)
Peoria
Utility serves 138K
Hardness296 ppm
LeadAbove limit
ViolationsNone
East St Louis
Utility serves 132K
Hardness249 ppm
LeadBelow limit
ViolationsNone
Springfield
Utility serves 129K
Hardness280.5 ppm
LeadBelow limit
Violations35 (3yr)
Elgin
Utility serves 116K
Hardness323 ppm
LeadAbove limit
Violations29 (3yr)