Clark Water Quality Report
5 cities ranked · Average grade: B · Illinois
Avg Score
78.8
Cities Ranked
5
Health Violations
3
PFAS Detected
0
78.8
County avg score
5
Cities ranked
80%
A or B grade
0%
D or F grade
3
Health violations
0
PFAS detected
Grade Distribution
How Clark cities scored
A
2
40%
Excellent
B
2
40%
Good
C
1
20%
Fair
D
0
0%
Poor
F
0
0%
Failing
Comparison
County vs Illinois average
▼ 0.9 pts below state average
City Map
Water quality across Clark
Each dot is a city, colored by grade. Click any city to view its full report.
Highlights
Top & bottom cities in Clark
Worst cities
County context
1
Superfund site in Clark
100.0%
of residents on fluoridated water (CDC, 2020)
0
lbs/yr to surface water · top 10 TRI facilities
Industrial pollution
Top industrial polluters in Clark
Industrial polluters nearby
Facilities reporting the most surface-water releases in Clark, 2023.
| Facility | Top chemical | To surface water (lbs/yr) |
|---|---|---|
ZF ACTIVE SAFETY & ELECTRONICS US LLC MARSHALL, IL62441 | — | — |
ID CASTINGS MARTINSVILLE, IL62442 | — | — |
Source: EPA Toxic Release Inventory (TRI) 2023
Superfund sites
Superfund sites in Clark
Superfund sites nearby
Federally tracked hazardous-waste sites within Clark on the EPA National Priorities List.
- VELSICOL CHEMICAL CORP MARSHALL PLANT
Source: EPA Superfund National Priorities List
Full Rankings
All 5 cities in Clark
| # | City | Grade | Score | Score | Population | Violations | Issues |
|---|---|---|---|---|---|---|---|
| 1 | West Union | A- | 88.9 | 501 | 13 | Unresolved | |
| 2 | Marshall | A- | 86.7 | 10K | 18 | Unresolved | |
| 3 | Martinsville | B+ | 84.4 | 1K | 19 | Health Unresolved | |
| 4 | Casey | B | 76.4 | 3K | 39 | Health Unresolved | |
| 5 | Westfield | C- | 57.8 | 678 | 90 | Health Unresolved |