Flathead Water Quality Report
7 cities ranked · Average grade: C+ · Montana
Avg Score
68
Cities Ranked
7
Health Violations
7
PFAS Detected
3
68
County avg score
7
Cities ranked
57%
A or B grade
43%
D or F grade
7
Health violations
3
PFAS detected
Grade Distribution
How Flathead cities scored
A
3
43%
Excellent
B
1
14%
Good
C
0
0%
Fair
D
1
14%
Poor
F
2
29%
Failing
Comparison
County vs Montana average
▲ 2.3 pts above state average
City Map
Water quality across Flathead
Each dot is a city, colored by grade. Click any city to view its full report.
Highlights
Top & bottom cities in Flathead
County context
1
Superfund site in Flathead
0
lbs/yr to surface water · top 10 TRI facilities
Industrial pollution
Top industrial polluters in Flathead
Industrial polluters nearby
Facilities reporting the most surface-water releases in Flathead, 2023.
| Facility | Top chemical | To surface water (lbs/yr) |
|---|---|---|
JTL GROUP-KALISPELL DBA KNIFE RIVER - KALISPELL KALISPELL, MT59901 | — | — |
WEYERHAEUSER NR KALISPELL, MT59901 | — | — |
CITYSERVICEVALCON LLC KALISPELL BULK FACILITY KALISPELL, MT59901 | — | — |
CITYSERVICEVALCON LLC SOUTH PLANT BULK FACILITY KALISPELL, MT59901 | — | — |
WEYERHAEUSER NR COLUMBIA FALLS, MT59912 | — | — |
Source: EPA Toxic Release Inventory (TRI) 2023
Superfund sites
Superfund sites in Flathead
Superfund sites nearby
Federally tracked hazardous-waste sites within Flathead on the EPA National Priorities List.
- ANACONDA ALUMINUM CO COLUMBIA FALLS REDUCTION PLANT
Source: EPA Superfund National Priorities List
Full Rankings
All 7 cities in Flathead
| # | City | Grade | Score | Score | Population | Violations | Issues |
|---|---|---|---|---|---|---|---|
| 1 | Somers | A- | 89.7 | 1K | 25 | Health Unresolved | |
| 2 | Hungry Horse | A- | 88.6 | 1K | 29 | Health Unresolved | |
| 3 | Bigfork | A- | 87 | 7K | 37 | Health Unresolved | |
| 4 | Lakeside | B+ | 82.9 | 2K | 72 | Health Unresolved | |
| 5 | Columbia Falls | D | 45.5 | 6K | 449 | Health Unresolved | |
| 6 | Whitefish | F | 42 | 16K | 733 | Health PFAS Unresolved | |
| 7 | Kalispell | F | 40.1 | 42K | 2471 | Health PFAS Unresolved |