Yellowstone, MT
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 Yellowstone in Montana · Population: 167,340
TRI sites such as Par Montana Billings Refinery; Chs Inc. Laurel Refinery; Western Sugar COOPERATIVE.130130; SDWIS systems such as BILLINGS CITY OF; BILLINGS HEIGHTS CO WATER DIST OF; LAUREL MUNICIPAL WATER SYSTEM; NPL sites such as Billings PCE; Lockwood Solvent Ground Water Plume anchor Yellowstone, MT's EPA extract. Derived burden score 64/100 (High 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 Yellowstone include LAUREL MUNICIPAL WATER SYSTEM; WORDEN BALLANTINE YELLOWSTONE; GRANITE PARK WATER ASSOCIATION, while Par Montana Billings Refinery leads reported TRI pounds among local Form R filers. AQS median AQI 39 / peak 105 in 2024.
Burden score 64/100 (High 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 Yellowstone -- 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 Yellowstone, MT: EPA TRI 2023 reporting year
Same facilities, both years
+7.7%
15 facilities that filed in 2022 and 2023
Whole inventory
+7.7%
642.1 thousand lb → 691.5 thousand lb, every facility that filed
- Yellowstone, MT's total reported releases rose from 642.1 thousand lb in 2022 to 691.5 thousand lb in 2023, based on EPA TRI filings.
- Yellowstone, MT's land releases rose from 729 lb in 2022 to 16.6 thousand lb in 2023, based on EPA TRI filings.
- Yellowstone, MT's water releases rose from 19.8 thousand lb in 2022 to 59.1 thousand lb in 2023, based on EPA TRI filings.
- Yellowstone, MT's off-site transfers rose from 32.7 thousand lb in 2022 to 57.2 thousand lb in 2023, based on EPA TRI filings.
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 |
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 (49)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| BILLINGS CITY OF | 114,000 | 0 |
| BILLINGS HEIGHTS CO WATER DIST OF | 12,000 | 0 |
| LAUREL MUNICIPAL WATER SYSTEM | 6,339 | 3 |
| LOCKWOOD WATER AND SEWER DISTRICT | 5,900 | 0 |
| PIONEER WATER SERVICE | 900 | 0 |
| WORDEN BALLANTINE YELLOWSTONE | 800 | 9 |
| FISHER WATER SERVICE | 750 | 0 |
| CHERRY CREEK ESTATES LLC | 600 | 0 |
| PRYOR CREEK WATER ASSN | 475 | 0 |
| FORT SMITH WATER AND SEWER DISTRICT | 450 | 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 | 4 |
| YELLOWSTONE BOYS AND GIRLS RANCH | 240 | 0 |
| WELLS GARDEN ESTATES | 240 | 0 |
| SKYCREST ESTATES SUBDIVISION | 235 | 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 |
| ARROW CREEK TRAILER COURT | 75 | 22 |
| BLACK ROCK ESTATES SUBDIVISION | 75 | 0 |
| DUCK CREEK MOBILE HOME PARK | 70 | 7 |
| 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 |
Superfund Sites (2)
| Site Name | Status | HRS Score |
|---|---|---|
| Billings PCE | NPL Site | 50.00 |
| Lockwood Solvent Ground Water Plume | NPL Site | 45.69 |
Cities in Yellowstone (7)
Frequently Asked Questions
What is the environmental risk level in Yellowstone, Montana? ▼
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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.
Read our methodology - how this data is sourced, computed, and verified.