Winnebago Water Quality Report
9 cities ranked · Average grade: B · Illinois
Avg Score
76.3
Cities Ranked
9
Health Violations
9
PFAS Detected
4
76.3
County avg score
9
Cities ranked
78%
A or B grade
11%
D or F grade
9
Health violations
4
PFAS detected
Grade Distribution
How Winnebago cities scored
A
3
33%
Excellent
B
4
44%
Good
C
1
11%
Fair
D
0
0%
Poor
F
1
11%
Failing
Comparison
County vs Illinois average
▼ 3.4 pts below state average
City Map
Water quality across Winnebago
Each dot is a city, colored by grade. Click any city to view its full report.
Highlights
Top & bottom cities in Winnebago
County context
5
Superfund sites in Winnebago
98.4%
of residents on fluoridated water (CDC, 2020)
106
lbs/yr to surface water · top 10 TRI facilities
Industrial pollution
Top industrial polluters in Winnebago
Industrial polluters nearby
Facilities reporting the most surface-water releases in Winnebago, 2023.
Total reported releases to surface water: 106 lbs
| Facility | Top chemical | To surface water (lbs/yr) |
|---|---|---|
GUNITE CORP ROCKFORD, IL61104 | Manganese | 106 |
QUANTUM DESIGN INC CALEDONIA, IL61011 | — | — |
TAYLOR CO ROCKTON, IL61072 | — | — |
OZINGA READY MIX ROSCOE, IL61073 | — | — |
ECOLAB INC ROSCOE, IL61073 | — | — |
+ 5 more facilities
Source: EPA Toxic Release Inventory (TRI) 2023
Superfund sites
Superfund sites in Winnebago
Superfund sites nearby
Federally tracked hazardous-waste sites within Winnebago on the EPA National Priorities List.
- ACME SOLVENT RECLAIMING INC MORRISTOWN PLANT
- BELOIT CORP
- INTERSTATE POLLUTION CONTROL INC
- PAGEL S PIT
- SOUTHEAST ROCKFORD GROUND WATER CONTAMINATION
Source: EPA Superfund National Priorities List
Full Rankings
All 9 cities in Winnebago
| # | City | Grade | Score | Score | Population | Violations | Issues |
|---|---|---|---|---|---|---|---|
| 1 | Winnebago | A | 93.2 | 3K | 27 | Health Unresolved | |
| 2 | Pecatonica | A- | 87.7 | 2K | 27 | Health Unresolved | |
| 3 | South Beloit | A- | 85.9 | 9K | 40 | Health Unresolved | |
| 4 | Cherry Valley | B+ | 84 | 5K | 6 | Health Unresolved | |
| 5 | Machesney Park | B | 78.5 | 36K | 19 | Health PFAS Unresolved | |
| 6 | Loves Park | B | 78 | 28K | 103 | Health Unresolved | |
| 7 | Durand | B | 77.8 | 1K | 18 | Health Unresolved | |
| 8 | Rockton | C | 63.5 | 8K | 60 | Health Unresolved | |
| 9 | Rockford | F | 38.4 | 148K | 218 | Health Unresolved |