Grundy Water Quality Report
8 cities ranked · Average grade: B- · Illinois
Avg Score
71.4
Cities Ranked
8
Health Violations
8
PFAS Detected
4
71.4
County avg score
8
Cities ranked
63%
A or B grade
25%
D or F grade
8
Health violations
4
PFAS detected
Grade Distribution
How Grundy cities scored
A
2
25%
Excellent
B
3
38%
Good
C
1
13%
Fair
D
1
13%
Poor
F
1
13%
Failing
Comparison
County vs Illinois average
▼ 8.3 pts below state average
City Map
Water quality across Grundy
Each dot is a city, colored by grade. Click any city to view its full report.
Highlights
Top & bottom cities in Grundy
County context
69.4%
of residents on fluoridated water (CDC, 2020)
107
lbs/yr to surface water · top 10 TRI facilities
Industrial pollution
Top industrial polluters in Grundy
Industrial polluters nearby
Facilities reporting the most surface-water releases in Grundy, 2023.
Total reported releases to surface water: 107 lbs
| Facility | Top chemical | To surface water (lbs/yr) |
|---|---|---|
NOURYON SURFACE CHEMISTRY LLC MORRIS, IL60450 | Ammonia | 57 |
EQUISTAR CHEMICALS LP MORRIS, IL60450 | Polycyclic aromatic compounds | 50 |
OLDCASTLE APG - MORRIS MORRIS, IL60450 | Lead | 0 |
H.B. FULLER CO MORRIS, IL60450 | — | — |
POLYNT COMPOSITES USA INC. MORRIS, IL60450 | — | — |
+ 4 more facilities
Source: EPA Toxic Release Inventory (TRI) 2023
Full Rankings
All 8 cities in Grundy
| # | City | Grade | Score | Score | Population | Violations | Issues |
|---|---|---|---|---|---|---|---|
| 1 | Diamond | A- | 86.1 | 3K | 86 | Health Unresolved | |
| 2 | Minooka | A- | 85.5 | 13K | 88 | Health Unresolved | |
| 3 | Mazon | B+ | 83.6 | 994 | 14 | Health Unresolved | |
| 4 | South Wilmington | B+ | 83.1 | 700 | 38 | Health Unresolved | |
| 5 | Gardner | B+ | 83 | 2K | 59 | Health Unresolved | |
| 6 | Braceville | C | 63.9 | 800 | 58 | Health Unresolved | |
| 7 | Coal City | D | 47.5 | 6K | 202 | Health Unresolved | |
| 8 | Morris | F | 38.7 | 15K | 238 | Health Unresolved |