PlainEnviro

Flathead, MT

Moderate Risk (43/100)

Transparent derived index from EPA TRI / SDWIS / Superfund extracts: not an official EPA rating. Fixed caps: facilities ≤25 pts (50+ = max), log10 releases ≤25 pts, Superfund ≤25 pts (5/site), health-violation systems ≤15 pts (3/system), high-chemical facilities ≤10 pts. Bands: High ≥60, Moderate ≥30. See methodology.

Environmental data for Flathead in Montana · Population: 108,445

TRI sites such as Weyerhaeuser Nr; Jtl Group-Kalispell DBA Knife River - Kalispell; Cityservicevalcon LLC Kalispell Bulk Facility; SDWIS systems such as WHITEFISH CITY OF; FLATHEAD COUNTY WATER AND SEWER; COLUMBIA FALLS CITY OF; NPL sites such as Anaconda Aluminum Co Columbia Falls Reduction Plant anchor Flathead, MT's EPA extract. Derived burden score 43/100 (Moderate Risk) uses fixed national caps on density, log release volume, Superfund count, and health-flagged systems - not an official EPA rating.

Health-flagged SDWIS rows in Flathead include FLATHEAD COUNTY WATER DIST 101; NORTHWOODS WATER SYSTEM COOP INC; PLEASANT HILL ESTATES HOA, while Weyerhaeuser Nr leads reported TRI pounds among local Form R filers. AQS median AQI 42 / peak 95 in 2024.

Burden score 43/100 (Moderate Risk) is the only weighted composite on this page. The tables below list every TRI facility, SDWIS system, and Superfund site EPA has on record for Flathead -- not just the names called out above -- reproducing the disclosure history as filed, not a current-safety verdict. Extract current as of 2026-08-25.

Release-over-release change

What changed for Flathead, MT: EPA TRI 2023 reporting year

2022 → 2023

Same facilities, both years

-15.4%

5 facilities that filed in 2022 and 2023

Whole inventory

-15.4%

165.2 thousand lb → 139.7 thousand lb, every facility that filed

  • Flathead, MT's total reported releases fell from 165.2 thousand lb in 2022 to 139.7 thousand lb in 2023, based on EPA TRI filings.
  • Flathead, MT's air releases fell from 165.0 thousand lb in 2022 to 139.6 thousand lb in 2023, based on EPA TRI filings.
  • Flathead, MT's land releases fell from 192 lb in 2022 to 180 lb in 2023, based on EPA TRI filings.
County population (Census ACS)
108,445
TRI Facilities
5
Water Systems
100
Superfund Sites
1
Total Releases
866.9K lbs

Air Quality History (2020–2024)

EPA Air Quality Index (AQI) data showing how many days per year fall into each air quality category.

Year Good Moderate Unhealthy (SG) Max AQI
2024 253 (69%) 113 0 95
2023 237 (65%) 120 6 160
2022 249 (68%) 113 2 152
2021 268 (73%) 88 8 155
2020 286 (78%) 72 3 206
2024 Good Air Quality: 69% of days
Median AQI: 42

Source: EPA Air Quality System (AQS) Annual AQI by County AQI categories: Good (0-50), Moderate (51-100), Unhealthy for Sensitive Groups (101-150), Unhealthy (151-200), Very Unhealthy (201-300), Hazardous (301+)

For real-time air quality readings and pollutant breakdowns in Montana, see the EPA's AirNow.gov.

Water Systems (100)

System System pop (SDWIS) Violations
WHITEFISH CITY OF 10,418 0
FLATHEAD COUNTY WATER AND SEWER 7,775 0
COLUMBIA FALLS CITY OF 4,450 0
BIG MOUNTAIN WATER COMPANY 2,435 0
LAKESIDE WATER SYSTEM 1,225 0
HUNGRY HORSE CO WATER AND SEWER DISTRICT 1,135 0
ST MARY HEADQUARTERS AND CG 1,030 0
MEADOW LAKE CO WATER AND SEWER DISTRICT 950 0
SOMERS CO WATER AND SEWER DIST 765 0
PTARMIGAN VILLAGE INC 600 0
HEADQUARTERS APGAR 500 0
FLATHEAD CO WATER DISTRICT NO 8 475 0
CORAM COUNTY WATER AND SEWER DISTRICT 450 0
FOREST ACRES TR PK WHITEFISH 390 0
CHERRY VIEW 352 0
MARTIN CITY COUNTY WATER DISTRICT 340 0
IRON HORSE HOMEOWNERS ASSOC 335 0
SOUTHSIDE PUBLIC WATER SUPPLY 306 0
NORTHERN PINES COMMUNITY HOA 295 0
ALPINE PACIFIC UTILITIES 270 0
COUNTRY LAKE HOMES WHITEFISH 260 0
PONDEROSA HOMEOWNERS ASSN INC 246 0
KOKANEE BEND HOA 230 0
FLATHEAD COUNTY WATER DIST 101 210 2
HAPPY VALLEY WATER DIST B KSPL 207 0
LION MOUNTAIN HOMEOWNERS ASSOC 204 0
GREENWOOD VILLAGE RV AND MHP 195 0
TAMARACK WOODS HOA LAKESIDE 180 0
FOX HILL ESTATES 163 0
EAST EVERGREEN MOBILE MANOR 155 0
MEADOWLAND HOA 150 0
YOUTH WITH A MISSION 150 0
QUAIL RIDGE 148 0
ROCKY CLIFF ESTATES 140 0
NORTHWOODS WATER SYSTEM COOP INC 135 1
SUNRISE TERRACE SUBD NO 2 131 0
MEADOW HILLS WATER AND SEWER DISTRICT 130 0
WEST VALLEY PINES HOA INC 130 0
STILLWATER ESTATES COUNTY W AND S DIST 130 0
TWO MILE TRACT HOA 128 0
COUNTRY ESTATES MBLE HOME PARK 125 0
ALPINE VILLAGE WUA 125 0
THE BENCHES 123 0
HOLBROOK ESTATES 120 0
RIVERSIDE MOBILE HOME PARK 100 0
LAKESHORE HEIGHTS HOA 100 0
THOMPSON RANCHETTES II 100 0
NORTH HAVEN HEIGHTS WATER ASSOC INC 95 0
STONERIDGE HOME OWNERS ASSOCIATION 95 0
LAKEVIEW PARK ESTATES HOMEOWNERS ASSOC 92 0
PLEASANT HILL ESTATES HOA 90 2
WEST GLACIER WUA 90 0
STILLWATER WATER DISTRICT 85 0
PLEASANT VIEW HOMESITES W AND S DISTRICT 85 1
GREEN ACRES COURT 85 0
OUTBACK MOBILE HOME SETTLEMENT 80 0
HIDEAWAY TR PK COLUMBIA FALLS 75 1
ASPEN KNOLL 75 0
ASHLEY HILLS HOA 75 0
EMERALD HEIGHTS HOA WATER & SEWER DIST 70 0
PANORAMIC MOUNTAIN RIVER HEIGHTS W DIST 65 0
HILLCREST COMMUNITY WATER 65 0
SWEETGRASS RANCH SUBDIVISION 65 0
SOUTH EIGHTY WATER 63 0
EAST VALLEY ESTATES 63 0
DWAYNES VILLAGE 63 0
HALFMOON MOBILE HOME PARK INC 60 0
SKYVIEW PARK 55 1
CHAUTAUQUA TERRACE HOA 55 0
BLANCHARD HOLLOW ESTATES WUA 53 0
FIELDSTONE SUBDIVISION 52 0
R J NORTHERN PARK 50 0
FOREST HILL HOA 50 0
DISTRICT COURT LLC 50 0
HELENA NORTH KOA 50 0
STONE RIDGE WATER COMPANY 50 0
ROSEWOOD ACRES 50 0
WHITEFISH HILLS VILLAGE 50 0
BEST VIEW ESTATES 50 0
COLUMBIA RANGE HOA 47 1
SKY RANCH WATER ASSOCIATION 45 0
PRAIRIE FALCON ACRES 41 0
HANSONS TRAILER COURT 40 0
SPRUCE MEADOWS HOA 40 0
WHITEFISH RIVER RANCH 38 0
EAST WOOD VILLAGE TRAILER PARK 36 0
FOYS LAKESIDE ESTATES WATER & SEWER DIST 36 1
RIDGEVIEW WATER USERS ASSOC 35 0
BIG SKY MOBILE MANOR 35 1
ELK PARK VILLAGE 35 0
RIVERVIEW OVERLOOK HOA 33 0
HADLEY ROAD HOA 33 0
BROOK DRIVE WATER ASSN 32 0
WAPITI ACRES COUNTY WATER AND SEWER DIST 32 0
GREAT BEAR ESTATES 32 0
TIMBER RIDGE HOA 30 0
SWAN RIDGE HOA 28 1
COUNTRY COURT COMMUNITY INC 25 0
COUNTRY BOURNE 25 0
HALFMOON MEADOWS HOA 25 0

TRI Facilities (5)

# Facility Total Releases
1 Weyerhaeuser Nr 866.1K lbs
2 Jtl Group-Kalispell DBA Knife River - Kalispell 790 lbs
3 Cityservicevalcon LLC Kalispell Bulk Facility 0 lbs
4 Weyerhaeuser Nr 0 lbs
5 Cityservicevalcon LLC South Plant Bulk Facility 0 lbs

Superfund Sites (1)

Site Name Status HRS Score
Anaconda Aluminum Co Columbia Falls Reduction Plant NPL Site 68.39

Cities in Flathead (9)

Kalispell
4 facilities · 71 water
Columbia Falls
1 facilities · 27 water
Lakeside
0 facilities · 7 water
Whitefish
0 facilities · 7 water
Somers
0 facilities · 3 water
West Glacier
0 facilities · 3 water
Coram
0 facilities · 1 water
Hungry Horse
0 facilities · 1 water
Martin City
0 facilities · 1 water

Frequently Asked Questions

What is the environmental risk level in Flathead, Montana? ▼
Flathead, MT has an environmental risk score of 43/100 (Moderate Risk), based on 5 TRI facilities, 1 Superfund sites, and 100 water systems on record. 10 water systems have health-based violations. Source: EPA TRI, SDWIS, and Superfund NPL.
Are there Superfund sites in Flathead? ▼
Yes, Flathead, MT has 1 Superfund site on the EPA National Priorities List (NPL). Superfund sites are contaminated locations that require long-term cleanup under the EPA Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA).
How many toxic release facilities are in Flathead? ▼
Flathead, MT has 5 TRI-reporting facilities on record with the EPA Toxic Release Inventory, with a combined total of 866.9K lbs in reported toxic releases. TRI facilities self-report annual chemical release data to the EPA.
What is the air quality in Flathead? ▼
In 2024, Flathead, MT recorded a median AQI of 42 and a peak AQI of 95. 69% of monitored days had "Good" air quality (AQI 0–50). Source: EPA Air Quality System (AQS) Annual AQI by County.
Is the drinking water safe in Flathead? ▼
Flathead, MT has 100 EPA-regulated water systems. 10 systems have reported health-based violations (MCL exceedances). A past violation does not necessarily mean water is currently unsafe. For current water quality, contact your local water utility. Source: EPA SDWIS.
What environmental agencies cover Flathead? ▼
Environmental compliance in Flathead, Montana is overseen by the U.S. Environmental Protection Agency (EPA) at the federal level and the Montana state environmental agency. Facilities report to the EPA Toxic Release Inventory, water systems are regulated under the Safe Drinking Water Act, and contaminated sites are managed under the Superfund program. Contact your state environmental agency for local concerns.

What does this county environmental profile show?

This county environmental profile rolls up EPA Toxics Release Inventory facility reports, Safe Drinking Water Information System public-water-system filings, and Superfund National Priorities List sites for the county boundary defined by the U.S. Census Bureau. Facility counts reflect facilities with a reporting address inside the county, not where downstream environmental effects may be observed. Population figures are from the most recent Census ACS 5-year estimate. The county detail page is updated whenever the upstream EPA programs publish revised data; see the methodology page for the documented ingest cadence and the editorial choices governing how aggregations are computed.

Related Guides

Understanding EPA Data
How EPA collects and publishes environmental data
Environmental Justice
Who lives near polluters and environmental hazards
How to Check Environmental Quality
Step-by-step guide to checking your local environment

Read our methodology - how this data is sourced, computed, and verified.

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Data sourced from U.S. EPA environmental datasets. See our methodology for details. Retrieved and formatted by PlainEnviro