#46 of 51B
Illinois Water Quality
Illinois ranks #46 out of 51 states for tap water quality with a score of 76.8 out of 100.
Summary
Overall Score
76.8
out of 100
Cities Tested
315
cities
Cities w/ Violations
310
98% of cities
Avg Contaminants
5.2
above guidelines
Population
22.2M
people affected
Best Cities in Illinois
Pop: 177,746Score: 100
Pop: 3,470Score: 96
Pop: 386Score: 90
Pop: 876Score: 90
Pop: 30,468Score: 90
Cities Needing Improvement
Pop: 4,516Score: 70
Pop: 12,709Score: 70
Pop: 11,243Score: 70
Pop: 23,144Score: 70
Pop: 71,034Score: 70
Cities listed have the lowest water quality scores in Illinois.
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