Yellowstone County, Wyoming — Property Hazard, Flood Zone, Soil, Water & EPA Guide
What Are the Flood, Soil Foundation & EPA Risks in Yellowstone County, WY?
In Yellowstone County, Wyoming, public U.S. EPA records track 1 regulated facilities (#54 of 54 in Wyoming), including 0 (0.0%) High-Risk sites and $0 in federal penalties. Countywide due diligence also covers 0 Safe Drinking Water (SDWIS) facilities, 0 Clean Water NPDES permits, 7 FEMA Federal Disaster Declarations (1 flood/storm), USDA Soil Foundation Shrink-Swell (LOW signal), and EPA Zone 1 — High Potential (> 4.0 pCi/L).
Yellowstone 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📊 Yellowstone County, WY Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 05, 2026)Municipalities in Yellowstone County
ZIP Codes in Yellowstone County
Top EPA Regulated Facilities in Yellowstone 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 |
|---|---|---|---|---|
| JP OIL COMPANY JOHNSON BATTERY FREE PREVIEW (LOW RISK) | UNKNOWN, NIOBRARA COUNTY, WY 99999 | LOW (10/100) | No Violation Identified (0 qtrs NC) | $0 |
Frequently Asked Questions — Yellowstone County, Wyoming Environmental Due Diligence
How many EPA-regulated environmental sites are in Yellowstone County County, Wyoming?
Public U.S. EPA records track 1 regulated facilities in Yellowstone County County, Wyoming (ranking #54 of 54 jurisdictions in WY). Of those, 0 (0.0%) are classified in the High-Risk tier due to significant enforcement or chemical release history, and 0 (0.0%) have active non-compliance quarters.
Which ZIP codes and cities in Yellowstone County County have the highest regulated facility density?
Within Yellowstone County County, the highest concentrations of EPA-tracked facilities are located in local postal sectors, spanning municipal corridors including Yellowstone County.
How many hazardous waste (RCRA) and toxic release (TRI) handlers operate in Yellowstone County County?
Across Yellowstone 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 Yellowstone County County, WY?
Geologic indoor air screening places Yellowstone 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 Yellowstone County County, WY?
Federal records track 0 Safe Drinking Water (SDWIS) facilities, 0 Clean Water Act NPDES permits, and 0 impaired water dischargers in Yellowstone County County, alongside 7 historical FEMA federal disaster declarations (1 flood/storm events).
Does Yellowstone County, WY have expansive clay soil or foundation risk?
USDA regional soil engineering screening for Yellowstone County indicates a LOW 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.