County page
Big Horn County
Big Horn County currently shows 0 Superfund sites, 57 imported facility profiles, and 32,245 lbs in loaded TRI releases.
Overview
What this county page is saying
This live county page is generated from the ingested EPA datasets. It merges ECHO facility compliance rows, TRI release totals, and any Superfund sites attached to Big Horn County.
The latest loaded TRI year is 2024, with 32,245 lbs in county-level on-site releases tied to the imported facility set.
Focus points
Design and product notes
County pages combine facility compliance history with chemical release totals.
TRI chemistry shows what is being reported, while ECHO shows who keeps drawing enforcement attention.
Superfund records add legacy cleanup context even when live contaminant detail is still sparse.
Superfund layer
Cleanup sites in this county
Facilities
Worst polluters and compliance pressure
Briscoe Petroleum - Snyder Project
Violation Identified across 12 of the last 12 quarters in the imported ECHO record.
Montana Fwp - Central Mt Multi County Piscicide Permit
Violation Identified across 12 of the last 12 quarters in the imported ECHO record.
Hardin Wwt Facility
Significant noncompliance across 7 of the last 12 quarters, with $1,320 in recorded penalties.
Cottonwood Camp Fort Smith
Violation Identified across 12 of the last 12 quarters in the imported ECHO record.
Wegner Water Service
Violation Identified across 12 of the last 12 quarters in the imported ECHO record.
Crow Agency Lagoon
Significant Violation across 11 of the last 12 quarters in the imported ECHO record.
Lodge Grass, Town of Wwtf
Significant Violation across 11 of the last 12 quarters in the imported ECHO record.
Northern Cheyenne Youth Service Center
Violation Identified across 11 of the last 12 quarters in the imported ECHO record.
Pryor Water System-tp01 / Pumphouse
Violation Identified across 11 of the last 12 quarters in the imported ECHO record.
Wyola Water System-treatment Plant
Violation Identified across 11 of the last 12 quarters in the imported ECHO record.
Absaloka Mine
Violation Identified across 9 of the last 12 quarters in the imported ECHO record.
Westmoreland Absaloka Mining Llc
Violation Identified across 9 of the last 12 quarters in the imported ECHO record.
Crow Agency Water System
Significant noncompliance across 8 of the last 12 quarters in the imported ECHO record.
Kirby Saloon
Significant Violation across 8 of the last 12 quarters in the imported ECHO record.
Soap Creek Oil Field
Violation Identified across 7 of the last 12 quarters in the imported ECHO record.
East Decker Coal Mine-treatment Plant
Significant noncompliance across 7 of the last 12 quarters in the imported ECHO record.
Warren Transport - Hardin
Violation Identified across 6 of the last 12 quarters in the imported ECHO record.
St Charles School
Violation Identified across 6 of the last 12 quarters in the imported ECHO record.
City of Hardin
Significant noncompliance across 5 of the last 12 quarters in the imported ECHO record.
Lodgegrass, Town of
Violation Identified across 5 of the last 12 quarters in the imported ECHO record.
| Chemical | Group | Facilities | Total pounds |
|---|---|---|---|
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | TRI-listed chemical | 1 | 26,940 lbs |
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | TRI-listed chemical | 1 | 2,863 lbs |
| Manganese | TRI-listed chemical | 1 | 1,401 lbs |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | TRI-listed chemical | 1 | 321 lbs |
| Hydrogen fluoride | TRI-listed chemical | 1 | 321 lbs |
| Lead compounds | Metals and metal compounds | 1 | 208 lbs |
| Copper | TRI-listed chemical | 1 | 97 lbs |
| Zinc compounds | TRI-listed chemical | 1 | 92 lbs |
| Mercury compounds | TRI-listed chemical | 1 | 3 lbs |
| Dioxin and dioxin-like compounds | TRI-listed chemical | 1 | 1 lbs |
| Lead | Metals and metal compounds | 1 | 0 lbs |
| Ethylene glycol | TRI-listed chemical | 1 | 0 lbs |
| Mercury | TRI-listed chemical | 1 | 0 lbs |
Violation pages
State-level violation context tied to this county
-
Clean Air Act violations in Montana
Montana facilities in the imported ECHO data show air-program oversight, inspections, or noncompliance signals.
-
Clean Water Act violations in Montana
Montana facilities in the imported ECHO data show water-permit pressure, inspections, or noncompliance signals.
-
RCRA violations in Montana
Montana facilities in the imported ECHO data show hazardous-waste or RCRA oversight signals.