Jefferson County, Montana — Property Hazard, Flood Zone, Soil, Water & EPA Guide
What Are the Flood, Soil Foundation & EPA Risks in Jefferson County, MT?
In Jefferson County, Montana, public U.S. EPA records track 224 regulated facilities (#21 of 65 in Montana), including 2 (0.9%) High-Risk sites and $0 in federal penalties. Countywide due diligence also covers 46 Safe Drinking Water (SDWIS) facilities, 155 Clean Water NPDES permits, 22 FEMA Federal Disaster Declarations (8 flood/storm), USDA Soil Foundation Shrink-Swell (LOW signal), and EPA Zone 1 — High Potential (> 4.0 pCi/L).
Jefferson 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📊 Jefferson County, MT Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 05, 2026)Municipalities in Jefferson County
ZIP Codes in Jefferson County
Top EPA Regulated Facilities in Jefferson 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 • CLANCY, MT (ZIP 59634 Sector) | HIGH (64/100) | Violation Identified (12 qtrs NC) | 🔒 12 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #2 | 🔒 Exact Street & Parcel Redacted • MONTANA CITY, MT (ZIP 59634 Sector) | HIGH (64/100) | Significant Violation (8 qtrs NC) | 🔒 8 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • CLANCY, MT (ZIP 59634 Sector) | MODERATE (49/100) | Violation Identified (1 qtrs NC) | 🔒 1 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #4 | 🔒 Exact Street & Parcel Redacted • WHITEHALL, MT (ZIP 59759 Sector) | MODERATE (45/100) | Violation Identified (12 qtrs NC) | 🔒 12 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #5 | 🔒 Exact Street & Parcel Redacted • BOULDER, MT (ZIP 59632 Sector) | MODERATE (44/100) | Violation Identified (12 qtrs NC) | 🔒 12 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #6 | 🔒 Exact Street & Parcel Redacted • BOULDER, MT (ZIP 59632 Sector) | MODERATE (44/100) | Violation Identified (12 qtrs NC) | 🔒 12 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #7 | 🔒 Exact Street & Parcel Redacted • CLANCY, MT (ZIP 59634 Sector) | MODERATE (43/100) | Violation Identified (10 qtrs NC) | 🔒 10 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #8 | 🔒 Exact Street & Parcel Redacted • BASIN, MT (ZIP 59631 Sector) | MODERATE (43/100) | Violation Identified (11 qtrs NC) | 🔒 11 Qtrs Non-Compliance • Unlock → |
| JEFFERSON HIGH SCHOOL FREE PREVIEW (LOW RISK) | 310 S MAIN ST, BOULDER, MT 59632 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| MONTANA DEVELOPMENTAL CENTER BOULDER FREE PREVIEW (LOW RISK) | 310 4TH AVE, BOULDER, MT 59632 | LOW (16/100) | No Violation Identified (0 qtrs NC) | $0 |
| FULL CIRCLE TIRE FREE PREVIEW (LOW RISK) | 12 E LEGION ST, WHITEHALL, MT 59759 | LOW (16/100) | No Violation Identified (0 qtrs NC) | $0 |
| ELKHORN GOLD FIELDS INC FREE PREVIEW (LOW RISK) | MINING CLAIMS SEC14 6N 3W, BOULDER, MT 59632 | LOW (16/100) | No Violation Identified (0 qtrs NC) | $0 |
Frequently Asked Questions — Jefferson County, Montana Environmental Due Diligence
How many EPA-regulated environmental sites are in Jefferson County, Montana?
Public U.S. EPA records track 224 regulated facilities in Jefferson County, Montana (ranking #21 of 65 jurisdictions in MT). Of those, 2 (0.9%) are classified in the High-Risk tier due to significant enforcement or chemical release history, and 25 (11.2%) have active non-compliance quarters.
Which ZIP codes and cities in Jefferson County have the highest regulated facility density?
Within Jefferson County, the highest concentrations of EPA-tracked facilities are located in ZIP 59759 (Whitehall, 65 sites), ZIP 59634 (Clancy, 53 sites), ZIP 59632 (Boulder, 37 sites), spanning municipal corridors including Whitehall (68 sites), Clancy (38 sites), Boulder (36 sites).
How many hazardous waste (RCRA) and toxic release (TRI) handlers operate in Jefferson County?
Across Jefferson County, 23 facilities (10.3% 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 Jefferson County, MT?
Geologic indoor air screening places Jefferson 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 Jefferson County, MT?
Federal records track 46 Safe Drinking Water (SDWIS) facilities, 155 Clean Water Act NPDES permits, and 89 impaired water dischargers in Jefferson County, alongside 22 historical FEMA federal disaster declarations (8 flood/storm events).
Does Jefferson County, MT have expansive clay soil or foundation risk?
USDA regional soil engineering screening for Jefferson County indicates a LOW shrink-swell risk signal and steel pipe corrosivity rated Low. Run a street address scan to unlock the exact parcel soil series, LEP %, and water table depth.