Illinois Water Quality
1,782 water systems serving 12,123,082 people. 28,017 total violations on record.
Safety Grade Distribution
A
553
31%
B
261
15%
C
836
47%
D
60
3%
F
72
4%
1,782
Water Systems
12,123,082
Population Served
28,017
Total Violations
2,913
Health-Based
Most Contaminated Systems
CRISWELL COURT MHP
94 served1807 violations1525 recent
C
ACORN ACRES MHP
52 served311 violations311 recent
C
SAUK
9,921 served556 violations302 recent
C
CORTLAND CORNERS MHP
250 served221 violations216 recent
C
FORGE AT THE LAKE
387 served226 violations212 recent
C
LITCHFIELD
6,648 served159 violations159 recent
C
PLEASANT RIDGE MHP
284 served447 violations155 recent
C
COUNTRY ACRES MHP (LA SALLE COUNTY)
222 served148 violations125 recent
F
RECOVERY CENTERS OF AMERICA
130 served125 violations124 recent
C
FIELDS HILL IMPROVEMENT ASSOCIATION
312 served132 violations124 recent
D
Cleanest Water Systems
AURORA
183,000 served1 violations
A
IL AMERICAN-CHAMPAIGN
150,000 served0 violations
A
IL AMERICAN-PEORIA
137,575 served2 violations
A
IL AMERICAN-EAST ST LOUIS
131,368 served3 violations
A
EVANSTON
74,486 served1 violations
A
IL AMERICAN-WEST SUBURBAN
73,978 served0 violations
A
PALATINE
70,875 served4 violations
A
OAK PARK
54,583 served2 violations
A
NORMAL
52,736 served1 violations
A
ROMEOVILLE
50,458 served67 violations
A
Largest Water Systems in Illinois
| Water System | Grade | Population | Violations |
|---|---|---|---|
| CHICAGO | C | 2,746,388 | 98 |
| AURORA | A | 183,000 | 1 |
| JOLIET | C | 160,000 | 29 |
| NAPERVILLE | C | 156,406 | 5 |
| IL AMERICAN-CHAMPAIGN | A | 150,000 | 0 |
| ROCKFORD | C | 147,051 | 22 |
| IL AMERICAN-PEORIA | A | 137,575 | 2 |
| IL AMERICAN-EAST ST LOUIS | A | 131,368 | 3 |
| SPRINGFIELD | C | 117,444 | 8 |
| ELGIN | C | 114,797 | 16 |
| WAUKEGAN | C | 87,149 | 21 |
| CICERO | C | 83,000 | 13 |
| AQUA ILLINOIS-KANKAKEE | D | 80,000 | 13 |
| BLOOMINGTON | C | 77,610 | 4 |
| DECATUR | C | 76,122 | 4 |
| SCHAUMBURG | C | 75,750 | 11 |
| EVANSTON | A | 74,486 | 1 |
| IL AMERICAN-WEST SUBURBAN | A | 73,978 | 0 |
| ARLINGTON HEIGHTS | C | 73,320 | 45 |
| PALATINE | A | 70,875 | 4 |
Contaminants in Illinois
Cities in Illinois
CHICAGO(11)GODFREY(53)KANKAKEE(32)AURORA(5)JOLIET(10)NAPERVILLE(1)ROCKFORD(7)SPRINGFIELD(13)ELGIN(4)WAUKEGAN(1)DECATUR(3)LIBERTYVILLE(13)CICERO(1)BLOOMINGTON(6)SCHAUMBURG(4)EVANSTON(1)ARLINGTON HEIGHTS(2)PALATINE(1)SKOKIE(1)DES PLAINES(2)NORMAL(3)ORLAND PARK(1)OAK LAWN(1)BERWYN(1)TINLEY PARK(1)OAK PARK(1)WHEATON(4)DEKALB(3)MOLINE(7)ROMEOVILLE(1)PLAINFIELD(2)HOFFMAN ESTATES(1)DOWNERS GROVE(1)QUINCY(4)GLENVIEW(2)ROCK ISLAND(2)O'FALLON(1)ELMHURST(2)NORTHBROOK(8)LOMBARD(1)ST. CHARLES(10)BUFFALO GROVE(1)DIETERICH(17)MCHENRY(18)BARTLETT(1)MOUNT PROSPECT(1)CRYSTAL LAKE(1)CAROL STREAM(1)PARK RIDGE(1)WHEELING(1)EAST PEORIA(9)STREAMWOOD(1)ADDISON(2)OSWEGO(1)CARPENTERSVILLE(1)HANOVER PARK(1)CALUMET CITY(1)EDWARDSVILLE(5)MARION(8)MACHESNEY PARK(1)DARIEN(7)ELK GROVE VILLAGE(2)WOODRIDGE(1)GLENDALE HEIGHTS(1)MUNDELEIN(6)BURBANK(2)GENEVA(4)GALESBURG(2)DEERFIELD(2)COLLINSVILLE(2)ALGONQUIN(1)CENTRALIA(13)GURNEE(1)HIGHLAND PARK(1)WEST CHICAGO(2)NILES(2)MATTOON(3)LANSING(1)MONTGOMERY(1)GLEN ELLYN(1)LAKE IN THE HILLS(1)HUNTLEY(1)FRANKLIN PARK(2)NEW LENOX(2)CARBONDALE(5)OAK FOREST(1)ROUND LAKE BEACH(1)WILMETTE(1)CHARLESTON(3)CHICAGO HEIGHTS(1)BATAVIA(1)LOCKPORT(4)BELVIDERE(2)MACOMB(5)WOODSTOCK(1)MORTON GROVE(1)WESTMONT(2)ELMWOOD PARK(1)HARVEY(1)FRANKFORT(2)