City Water Quality Rankings in Illinois
631 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#313
Bannockburn
County, IL
72 C
#314 Franklin Park
County, IL
72 C
#315 Fulton
County, IL
72 C
#316 Hodgkins
County, IL
72 C
#317 Pittsburg
County, IL
72 C
#318 Shorewood
County, IL
72 C
#319 Washington
County, IL
72 C
#320 West Dundee
County, IL
72 C
#321 Woodlawn
County, IL
72 C
#322 Worth
County, IL
72 C
#323 Carrollton
County, IL
71 C
#324 Kenilworth
County, IL
71 C
#325 Lincolonwood
County, IL
71 C
#326 Norris City
County, IL
71 C
#327 Orland Park
County, IL
71 C
#328 Chicago Heights
County, IL
70 C
#329 Hampshire
County, IL
70 C
#330 Itasca
County, IL
70 C
#331 Malta
County, IL
70 C
#332 Mount Vernon
County, IL
70 C
#333 North Aurora
County, IL
70 C
#334 North Pekin
County, IL
70 C
#335 Palatine
County, IL
70 C
#336 Swansea
County, IL
70 C
Frequently Asked Questions
How are city water quality rankings calculated in Illinois?
WaterQ city rankings are based on EPA SDWIS data across local public water systems, including contaminant detections, compliance violations, and recency-weighted score signals.
Can I compare two cities in Illinois?
Yes. Use the city comparison links on this page or open the Compare tool to evaluate two cities side by side on score, grade, and water system coverage.
How often does WaterQ refresh city data?
City-level metrics refresh when new EPA data is processed. Check city pages for latest score and violation context.