Lewis And Clark Water Quality Report
3 cities ranked · Average grade: C- · Montana
Avg Score
57.1
Cities Ranked
3
Health Violations
2
PFAS Detected
1
57.1
County avg score
3
Cities ranked
33%
A or B grade
67%
D or F grade
2
Health violations
1
PFAS detected
Grade Distribution
How Lewis And Clark cities scored
A
0
0%
Excellent
B
1
33%
Good
C
0
0%
Fair
D
1
33%
Poor
F
1
33%
Failing
Comparison
County vs Montana average
▼ 8.6 pts below state average
City Map
Water quality across Lewis And Clark
Each dot is a city, colored by grade. Click any city to view its full report.
Highlights
Top & bottom cities in Lewis And Clark
Best cities
Worst cities
County context
2
Superfund sites in Lewis And Clark
0
lbs/yr to surface water · top 10 TRI facilities
Industrial pollution
Top industrial polluters in Lewis And Clark
Industrial polluters nearby
Facilities reporting the most surface-water releases in Lewis And Clark, 2023.
| Facility | Top chemical | To surface water (lbs/yr) |
|---|---|---|
FORTERRA CONCRETE PRODUCTS - HELENA HELENA, MT59601 | — | — |
AMERICAN CHEMET CORP EAST HELENA, MT59635 | — | — |
US ARMY NATIONAL GUARD FORT HARRISON RANGES FORT HARRISON, MT59636 | — | — |
Source: EPA Toxic Release Inventory (TRI) 2023
Superfund sites
Superfund sites in Lewis And Clark
Superfund sites nearby
Federally tracked hazardous-waste sites within Lewis And Clark on the EPA National Priorities List.
- EAST HELENA SITE
- UPPER TENMILE CREEK MINING AREA
Source: EPA Superfund National Priorities List
Full Rankings
All 3 cities in Lewis And Clark
| # | City | Grade | Score | Score | Population | Violations | Issues |
|---|---|---|---|---|---|---|---|
| 1 | Fort Harrison | B+ | 82.1 | 1K | 14 | Unresolved | |
| 2 | East Helena | D+ | 50 | 3K | 941 | Health Unresolved | |
| 3 | Helena | F | 39.1 | 44K | 2303 | Health Unresolved |