PlainEnviro

Yellowstone, MT

Moderate Risk (54/100)

A PlainEnviro-computed score from reported facility/violation counts, not an official EPA rating, health forecast, or population-adjusted rate. See methodology.

Environmental data for Yellowstone in Montana · Population: 167,340

Yellowstone, MT is tracked across three EPA datasets covering 18 Toxics Release Inventory (TRI) facilities, 46 Safe Drinking Water Act systems, and 0 Superfund National Priorities List sites. Together these generate an environmental burden score of 54/100 (Moderate Risk), calibrated against national distributions for facility density, chemical release volume, Superfund concentration, and water-system health violations.

Industrial disclosures inside the county total 3.5M lbs of reported toxic releases under EPCRA Section 313, while 7 water systems carry an active health-based violation in the SDWIS record. EPA Air Quality System monitors logged a median AQI of 39 and a peak AQI of 105 in 2024, with 76% of observed days rated "Good" (0–50).

All figures below draw directly from federal EPA records, TRI self-reported emissions, SDWIS compliance history, NPL Hazard Ranking System scores, and AQS daily AQI summaries, and are not adjusted, weighted, or forecast. A past violation or elevated score does not itself indicate current unsafe conditions; it documents the regulatory and disclosure history publicly filed with the U.S. Environmental Protection Agency through the most recent reporting cycle.

Population
167,340
TRI Facilities
18
Water Systems
46
Superfund Sites
0
Total Releases
3.5M 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 272 (76%) 84 1 105
2023 306 (86%) 47 3 191
2022 307 (84%) 56 1 155
2021 212 (62%) 118 9 167
2020 304 (84%) 57 2 163
2024 Good Air Quality: 76% of days
Unhealthy days: 1
Median AQI: 39

Source: EPA Air Quality System (AQS) Annual AQI by County 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 (46)

System Population Violations
BILLINGS CITY OF 114,000 0
CO WATER DIST OF BILLINGS HEIGHTS 12,000 0
LAUREL MUNICIPAL WATER SYSTEM 6,339 3
LOCKWOOD WATER AND SEWER DISTRICT 5,900 0
PIONEER WATER SERVICE 900 0
FISHER WATER SERVICE 750 0
CHERRY CREEK ESTATES LLC 600 0
PRYOR CREEK WATER ASSN 475 0
SUNDANCE SUBDIVISION 378 0
STONE CREEK SUBDIVISION 378 0
HIDDEN LAKE YELLOWSTONE COUNTY W AND S D 350 0
EMERALD VIEW PARK 320 0
SHILOH ROAD DEVELOPMENT 315 0
MOUNTAIN MEADOWS ESTATES LLP 300 0
MOBILE CITY HOME PARK NO 2 300 0
PRECISION WATER 250 0
GRANITE PARK WATER ASSOCIATION 250 3
YELLOWSTONE BOYS AND GIRLS RANCH 240 0
WELLS GARDEN ESTATES 240 0
HUNTLEY YELLOWSTONE CO WATER AND SEWER 230 1
CRYSTAL SPRINGS WATER SYSTEM 225 15
THE NINES SUBDIVISION 220 0
BROADVIEW TOWN OF 200 0
OAK RIDGE ESTATES 200 0
GO 2 U WATER DELIVERY 200 0
STILL RIVER ESTATES SUBDIVISION 188 2
SADDLEBACK RIDGE ESTATES 150 0
C & C COMMUNITY INC 145 0
GOLDEN EAGLE WATER USERS ASSN 125 1
MOUNTAIN VIEW COLONY 114 0
MOBILE CITY HOME PARK NO 1 100 0
ALDINGER ACRES SUBDIVISION 100 0
ERICS EMERGENCY WATER SERVICE 100 0
PEKS MOBILE HOME COURT 95 0
WESTANA MOBILE MANOR HAMILTON 90 0
BLACK ROCK ESTATES SUBDIVISION 75 0
DUCK CREEK MOBILE HOME PARK 70 6
SKYCREST ESTATES SUBDIVISION 65 0
FOX WATER SERVICE INCORPORATED 60 0
BLUE GRASS WATER USERS ASSOCIATION 60 0
RIO VISTA ESTATES HOA ASSOC INC 50 0
DOUBLE DIAMOND SUBDIVISION ARBOR HILLS 50 0
SPRUCE PARK MOBILE VILLAGE 48 0
MOBILE CITY 3 40 0
SARTORIE LEGACY HOMES 35 0
MCCANN'S WATER SERVICE LLC 25 0

TRI Facilities (18)

# Facility Total Releases
1 Par Montana Billings Refinery 881.7K lbs
2 Chs Inc. Laurel Refinery 816.2K lbs
3 Western Sugar COOPERATIVE.130130 582.2K lbs
4 Jupiter Sulphur LLC 539.8K lbs
5 Phillips 66 Co Billings Refinery 465.0K lbs
6 Montana Sulphur & Chemical Co 75.6K lbs
7 Lfm Laurel West 39.3K lbs
8 Lfm Laurel East 24.9K lbs
9 Brenntag Pacific Inc Mossmain Ln 20.0K lbs
10 Loveland Products Inc-Billings (formerly Transbas) 3.2K lbs
11 Jtl Group Billings (dba - Knife River Billings) 1.9K lbs
12 Knife River Billings East Site 750 lbs
13 Western Emulsions Inc Billings Plant 8 lbs
14 Quikrete - Montana Plant 0 lbs
15 Forterra Concrete Products - Billings 0 lbs
16 Cityservicevalcon LLC Billings Bulk Facility 0 lbs
17 Truenorth Steel 0 lbs
18 Westfeeds - Billings Premix 0 lbs

Cities in Yellowstone (2)

Laurel
Pop: -
3 facilities · 5 water
Billings
Pop: -
15 facilities · 38 water

Frequently Asked Questions

What is the environmental risk level in Yellowstone, Montana? ▼
Yellowstone, MT has an environmental risk score of 54/100 (Moderate Risk), based on 18 TRI facilities, 0 Superfund sites, and 46 water systems on record. 7 water systems have health-based violations. Source: EPA TRI, SDWIS, and Superfund NPL.
Are there Superfund sites in Yellowstone? ▼
No Superfund National Priorities List (NPL) sites are currently registered in Yellowstone, MT in the EPA database.
How many toxic release facilities are in Yellowstone? ▼
Yellowstone, MT has 18 TRI-reporting facilities on record with the EPA Toxic Release Inventory, with a combined total of 3.5M lbs in reported toxic releases. TRI facilities self-report annual chemical release data to the EPA.
What is the air quality in Yellowstone? ▼
In 2024, Yellowstone, MT recorded a median AQI of 39 and a peak AQI of 105. 76% 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 Yellowstone? ▼
Yellowstone, MT has 46 EPA-regulated water systems. 7 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 Yellowstone? ▼
Environmental compliance in Yellowstone, 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.

Related

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