Custer County, Idaho — Property Hazard, Flood Zone, Soil, Water & EPA Guide
What Are the Flood, Soil Foundation & EPA Risks in Custer County, ID?
In Custer County, Idaho, public U.S. EPA records track 97 regulated facilities (#38 of 83 in Idaho), including 4 (4.1%) High-Risk sites and $0 in federal penalties. Countywide due diligence also covers 48 Safe Drinking Water (SDWIS) facilities, 43 Clean Water NPDES permits, 11 FEMA Federal Disaster Declarations (3 flood/storm), USDA Soil Foundation Shrink-Swell (LOW signal), and EPA Zone 1 — High Potential (> 4.0 pCi/L).
Custer County, ID 6-in-1 Flood, Soil Foundation, Tap Water & Radon Signals
🔒 Parcel-Level Soil LEP %, Water Table Depth & Flood Zone Require Street Address Scan📊 Custer County, ID Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 03, 2026)Municipalities in Custer County
ZIP Codes in Custer County
Top EPA Regulated Facilities in Custer County, ID
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 • CHALLIS, ID (ZIP 83226 Sector) | HIGH (65/100) | Significant Violation (12 qtrs NC) | 🔒 12 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #2 | 🔒 Exact Street & Parcel Redacted • MACKAY, ID (ZIP 83251 Sector) | HIGH (64/100) | Significant Violation (12 qtrs NC) | 🔒 12 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • STANLEY, ID (ZIP 83278 Sector) | MODERATE (45/100) | Violation Identified (5 qtrs NC) | 🔒 5 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #4 | 🔒 Exact Street & Parcel Redacted • MACKAY, ID (ZIP 83251 Sector) | MODERATE (44/100) | Violation Identified (12 qtrs NC) | 🔒 12 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #5 | 🔒 Exact Street & Parcel Redacted • STANLEY, ID (ZIP 83278 Sector) | MODERATE (43/100) | Violation Identified (5 qtrs NC) | 🔒 5 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #6 | 🔒 Exact Street & Parcel Redacted • MACKAY, ID (ZIP 83251 Sector) | MODERATE (38/100) | Violation Identified (7 qtrs NC) | 🔒 7 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #7 | 🔒 Exact Street & Parcel Redacted • SALMON, ID (ZIP 83467 Sector) | MODERATE (38/100) | Violation Identified (5 qtrs NC) | 🔒 5 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #8 | 🔒 Exact Street & Parcel Redacted • CLAYTON, ID (ZIP 83227 Sector) | MODERATE (36/100) | Resolved / Historical Non-Compliance (4 qtrs NC) | 🔒 4 Qtrs Non-Compliance • Unlock → |
| ID DOL CHALLIS FREE PREVIEW (LOW RISK) | E MAIN ST, CHALLIS, ID 83226 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| US DA FS STANLEY WK CTR FREE PREVIEW (LOW RISK) | HWY 75 5 MI S OF STANLEY, STANLEY, ID 83278 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| WILLIAM RILEY PROPERTY FREE PREVIEW (LOW RISK) | 3471 HOT SPRINGS RD, CHALLIS, ID 83226 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| ROBINSON BAR RANCH FREE PREVIEW (LOW RISK) | ROBINSON BAR ROAD, STANLEY, ID 83278 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
Frequently Asked Questions — Custer County, Idaho Environmental Due Diligence
How many EPA-regulated environmental sites are in Custer County, Idaho?
Public U.S. EPA records track 97 regulated facilities in Custer County, Idaho (ranking #38 of 83 jurisdictions in ID). Of those, 4 (4.1%) are classified in the High-Risk tier due to significant enforcement or chemical release history, and 22 (22.7%) have active non-compliance quarters.
Which ZIP codes and cities in Custer County have the highest regulated facility density?
Within Custer County, the highest concentrations of EPA-tracked facilities are located in ZIP 83278 (Stanley, 30 sites), ZIP 83226 (Challis, 26 sites), ZIP 83227 (Clayton, 5 sites), spanning municipal corridors including Challis (26 sites), Stanley (23 sites), Clayton (5 sites).
How many hazardous waste (RCRA) and toxic release (TRI) handlers operate in Custer County?
Across Custer County, 24 facilities (24.7% 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 Custer County, ID?
Geologic indoor air screening places Custer 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 Custer County, ID?
Federal records track 48 Safe Drinking Water (SDWIS) facilities, 43 Clean Water Act NPDES permits, and 25 impaired water dischargers in Custer County, alongside 11 historical FEMA federal disaster declarations (3 flood/storm events).
Does Custer County, ID have expansive clay soil or foundation risk?
USDA regional soil engineering screening for Custer 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.