Chicago, IL water quality
Chicago, IL is served by 9 public water systems, serving 2,740,947 people combined. Across those systems, we count 6 health-based violations in the last 5 years. The worst Tap Grade among them is C.
Water systems serving Chicago
CHICAGO
CHICAGO, IL · 2,721,308 served
NORTHSHORE UNIVERSITY EVANSTON
CHICAGO, IL · 6,300 served
U OF I CHICAGO MEDICAL CENTER
CHICAGO, IL · 5,000 served
BURNHAM
BURNHAM, IL · 3,989 served
BLACKHAWK ESTATES LLC
CHICAGO, IL · 1,238 served
SWEDISH COVENANT HOSPITAL
CHICAGO, IL · 1,200 served
WILLOWAY TERRACE MHP
CHICAGO, IL · 900 served
JW MARRIOT HOTEL
CHICAGO, IL · 700 served
GLEN EDEN ESTATES HOMEOWNERS ASSOCIATION
NORWOOD PARK TOWNSHIP, IL · 312 served
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Is Chicago, IL tap water safe to drink?
9 public water systems serve Chicago, IL, with 6 health-based violations in the last 5 years across them. The worst Tap Grade among them is C. A Tap Grade summarizes public EPA compliance records; it is not a determination that water is safe or unsafe to drink.
Does Chicago's water have lead in it?
The most recent 90th-percentile lead sample is 14.2 ppb, versus the EPA action level of 15 ppb.
Has PFAS been detected in Chicago's water?
These systems were tested under UCMR5 and no PFAS was detected above the reporting limit in the analytes we track.
Source: EPA SDWIS/ECHO · Data as of 2026Q2
TapGraded presents public EPA data for information only — it is not health advice and not a determination that any water is safe or unsafe to drink. For health concerns, contact your water utility or local health department.