Big Horn County, Wyoming — Property Hazard, Flood Zone, Soil, Water & EPA Guide
What Are the Flood, Soil Foundation & EPA Risks in Big Horn County, WY?
In Big Horn County, Wyoming, public U.S. EPA records track 9 regulated facilities (#41 of 41 in Wyoming), including 1 (11.1%) High-Risk sites and $0 in federal penalties. Countywide due diligence also covers 0 Safe Drinking Water (SDWIS) facilities, 7 Clean Water NPDES permits, 7 FEMA Federal Disaster Declarations (1 flood/storm), USDA Soil Foundation Shrink-Swell (MODERATE signal), and EPA Zone 1 — High Potential (> 4.0 pCi/L).
Big Horn County, WY 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, WY Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 05, 2026)Municipalities in Big Horn County
ZIP Codes in Big Horn County
Top EPA Regulated Facilities in Big Horn County, WY
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 • GREYBULL, WY (ZIP 82426 Sector) | HIGH (64/100) | Significant Violation (9 qtrs NC) | 🔒 9 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #2 | 🔒 Exact Street & Parcel Redacted • BYRON, WY (ZIP 82412 Sector) | MODERATE (38/100) | Violation Identified (10 qtrs NC) | 🔒 10 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • BASIN, WY (ZIP 82410 Sector) | MODERATE (33/100) | Violation Identified (12 qtrs NC) | 🔒 12 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #4 | 🔒 Exact Street & Parcel Redacted • MANDERSON, WY (ZIP 82432 Sector) | MODERATE (29/100) | Violation Identified (8 qtrs NC) | 🔒 8 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #5 | 🔒 Exact Street & Parcel Redacted • LOVELL, WY (ZIP 82431 Sector) | MODERATE (24/100) | Violation Identified (5 qtrs NC) | 🔒 5 Qtrs Non-Compliance • Unlock → |
| DEAVER WASTEWATER LAGOON FREE PREVIEW (LOW RISK) | PO BOX 207, DEAVER, WY 82421 | LOW (13/100) | No Violation Identified (0 qtrs NC) | $0 |
| FRANNIE WASTEWATER LAGOONS FREE PREVIEW (LOW RISK) | PO BOX 72, FRANNIE, WY 82423 | LOW (13/100) | No Violation Identified (0 qtrs NC) | $0 |
| FRANNIE LIME PLANT (DAKOTA COAL) FREE PREVIEW (LOW RISK) | 30 US-310, FRANNIE, WY 82423 | LOW (12/100) | No Violation Identified (0 qtrs NC) | $0 |
| CAMP PAINTROCK FREE PREVIEW (LOW RISK) | 5332 CO RD 49 1/2, HYATTEVILLE, WY 82428 | LOW (9/100) | No Violation Identified (0 qtrs NC) | $0 |
Frequently Asked Questions — Big Horn County, Wyoming Environmental Due Diligence
How many EPA-regulated environmental sites are in Big Horn County County, Wyoming?
Public U.S. EPA records track 9 regulated facilities in Big Horn County County, Wyoming (ranking #41 of 41 jurisdictions in WY). Of those, 1 (11.1%) are classified in the High-Risk tier due to significant enforcement or chemical release history, and 5 (55.6%) have active non-compliance quarters.
Which ZIP codes and cities in Big Horn County County have the highest regulated facility density?
Within Big Horn County County, the highest concentrations of EPA-tracked facilities are located in local postal sectors, spanning municipal corridors including Deaver (3 sites), Hyatteville (1 sites).
How many hazardous waste (RCRA) and toxic release (TRI) handlers operate in Big Horn County County?
Across Big Horn County County, 0 facilities (0.0% 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 County, WY?
Geologic indoor air screening places Big Horn County 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 County, WY?
Federal records track 0 Safe Drinking Water (SDWIS) facilities, 7 Clean Water Act NPDES permits, and 3 impaired water dischargers in Big Horn County County, alongside 7 historical FEMA federal disaster declarations (1 flood/storm events).
Does Big Horn County, WY have expansive clay soil or foundation risk?
USDA regional soil engineering screening for Big Horn County indicates a MODERATE shrink-swell risk signal and steel pipe corrosivity rated Moderate. Run a street address scan to unlock the exact parcel soil series, LEP %, and water table depth.