Big Horn County, Montana — Property Hazard, Flood Zone, Soil, Water & EPA Guide
What Are the Flood, Soil Foundation & EPA Risks in Big Horn County, MT?
In Big Horn County, Montana, public U.S. EPA records track 267 regulated facilities (#16 of 65 in Montana), including 4 (1.5%) High-Risk sites and $4,140 in federal penalties. Countywide due diligence also covers 40 Safe Drinking Water (SDWIS) facilities, 201 Clean Water NPDES permits, 2 FEMA Federal Disaster Declarations (0 flood/storm), USDA Soil Foundation Shrink-Swell (HIGH signal), and EPA Zone 1 — High Potential (> 4.0 pCi/L).
Big Horn County, MT 6-in-1 Flood, Soil Foundation, Tap Water & Radon Signals
🔒 Parcel-Level Soil LEP %, Water Table Depth & Flood Zone Require Street Address Scan📊 Big Horn County, MT Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 03, 2026)Municipalities in Big Horn County
Top EPA Regulated Facilities in Big Horn County, MT
100% of High-Risk & penalized facilities have facility names, street names, and dockets redacted (3 Low-Risk compliant records shown as Free Previews).
| Facility Name / Hazard Type | Sector Location (Street Redacted) | Risk Tier & Score | Compliance Status | Enforcement / Unlock |
|---|---|---|---|---|
| 🔒 Locked High-Risk EPA Enforcement Record #1 | 🔒 Exact Street & Parcel Redacted • LODGE GRASS, MT (ZIP 59050 Sector) | HIGH (64/100) | Significant Violation (11 qtrs NC) | 🔒 11 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #2 | 🔒 Exact Street & Parcel Redacted • HARDIN, MT (ZIP 59034 Sector) | HIGH (64/100) | Significant Violation (12 qtrs NC) | 🔒 12 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • HARDIN, MT (ZIP 59034 Sector) | MODERATE (53/100) | Violation Identified (12 qtrs NC) | 🔒 12 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #4 | 🔒 Exact Street & Parcel Redacted • HARDIN, MT (ZIP 59034 Sector) | MODERATE (44/100) | Violation Identified (12 qtrs NC) | 🔒 12 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #5 | 🔒 Exact Street & Parcel Redacted • HARDIN, MT (ZIP 59034 Sector) | MODERATE (39/100) | Violation Identified (11 qtrs NC) | 🔒 11 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #6 | 🔒 Exact Street & Parcel Redacted • HARDIN, MT (ZIP 59034 Sector) | MODERATE (36/100) | Violation Identified (9 qtrs NC) | 🔒 9 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #7 | 🔒 Exact Street & Parcel Redacted • BUSBY, MT (ZIP 59016 Sector) | MODERATE (36/100) | Violation Identified (11 qtrs NC) | 🔒 11 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #8 | 🔒 Exact Street & Parcel Redacted • HARDIN, MT (ZIP 59034 Sector) | MODERATE (35/100) | Violation Identified (7 qtrs NC) | 🔒 7 Qtrs Non-Compliance • Unlock → |
| HARDIN SCHOOL DISTRICT ADMIN BLDG FREE PREVIEW (LOW RISK) | INDUSTRIAL PARK SUBDIVISION, HARDIN, MT 59034 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| BEARTOOTH DRILLING FREE PREVIEW (LOW RISK) | E OF WYOLA, WYOLA, MT 59089 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| BN HARDIN FREE PREVIEW (LOW RISK) | BNRR MILEPOST 770.75, CROW AGENCY, MT 59022 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| USBIA CROW INDIAN RESERVATION IRRIGATION FREE PREVIEW (LOW RISK) | E END OF MAIN ST, CROW AGENCY, MT 59022 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
Frequently Asked Questions — Big Horn County, Montana Environmental Due Diligence
How many EPA-regulated environmental sites are in Big Horn County, Montana?
Public U.S. EPA records track 267 regulated facilities in Big Horn County, Montana (ranking #16 of 65 jurisdictions in MT). Of those, 4 (1.5%) are classified in the High-Risk tier due to significant enforcement or chemical release history, and 14 (5.2%) have active non-compliance quarters.
Which ZIP codes and cities in Big Horn County have the highest regulated facility density?
Within Big Horn County, the highest concentrations of EPA-tracked facilities are located in ZIP 59034 (Hardin, 99 sites), ZIP 59025 (Decker, 67 sites), ZIP 59050 (Lodge Grass, 32 sites), spanning municipal corridors including Hardin (102 sites), Decker (66 sites), Lodge Grass (31 sites).
How many hazardous waste (RCRA) and toxic release (TRI) handlers operate in Big Horn County?
Across Big Horn County, 46 facilities (17.2% of regulated sites) are registered Resource Conservation and Recovery Act (RCRA) hazardous waste generators or handlers, and 0 industrial sites report toxic chemical releases to the EPA Toxics Release Inventory (TRI).
What is the EPA Radon Zone classification for Big Horn County, MT?
Geologic indoor air screening places Big Horn County in EPA Zone 1 — High Potential (> 4.0 pCi/L). Counties in EPA Radon Zone 1 have a predicted average indoor radon screening level greater than 4.0 pCi/L (the EPA action threshold). Short-term or continuous indoor radon testing is strongly recommended prior to closing.
How many drinking water systems (SDWIS), impaired water bodies, and FEMA flood disasters are recorded in Big Horn County, MT?
Federal records track 40 Safe Drinking Water (SDWIS) facilities, 201 Clean Water Act NPDES permits, and 23 impaired water dischargers in Big Horn County, alongside 2 historical FEMA federal disaster declarations (0 flood/storm events).
Does Big Horn County, MT have expansive clay soil or foundation risk?
USDA regional soil engineering screening for Big Horn County indicates a HIGH shrink-swell risk signal and steel pipe corrosivity rated High. Run a street address scan to unlock the exact parcel soil series, LEP %, and water table depth.