58.9
County avg score
3
Cities ranked
33%
A or B grade
67%
D or F grade
3
Health violations
1
PFAS detected
Grade Distribution
How Missoula 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
▼ 6.3 pts below state average
City Map
Water quality across Missoula
Each dot is a city, colored by grade. Click any city to view its full report.
Highlights
Top & bottom cities in Missoula
Best cities
Worst cities
County context
2
Superfund sites in Missoula
0
lbs/yr to surface water · top 10 TRI facilities
Industrial pollution
Top industrial polluters in Missoula
Industrial polluters nearby
Facilities reporting the most surface-water releases in Missoula, 2023.
| Facility | Top chemical | To surface water (lbs/yr) |
|---|---|---|
HEXION INC. MISSOULA, MT59808 | — | — |
ROSEBURG FOREST PRODUCTS CO. - MISSOULA PARTICLEBOARD MISSOULA, MT59808 | — | — |
PHILLIPS 66 MISSOULA PRODUCTS TERMINAL MISSOULA, MT59808 | — | — |
JTL GROUP MISSOULA (DBA KNIFE RIVER-MISSOULA) MISSOULA, MT59808 | — | — |
Source: EPA Toxic Release Inventory (TRI) 2023
Superfund sites
Superfund sites in Missoula
Superfund sites nearby
Federally tracked hazardous-waste sites within Missoula on the EPA National Priorities List.
- MILLTOWN RESERVOIR SEDIMENTS
- SMURFIT STONE MILL FRENCHTOWN
Source: EPA Superfund National Priorities List
Full Rankings
All 3 cities in Missoula
| # | City | Grade | Score | Score | Population | Violations | Issues |
|---|---|---|---|---|---|---|---|
| 1 | Seeley Lake | B+ | 82.1 | 2K | 88 | Health Unresolved | |
| 2 | Lolo | D+ | 52 | 4K | 644 | Health Unresolved | |
| 3 | Missoula | F | 42.6 | 77K | 4300 | Health Unresolved |