Custer County, South Dakota — Property Hazard, Flood Zone, Soil, Water & EPA Guide
What Are the Flood, Soil Foundation & EPA Risks in Custer County, SD?
In Custer County, South Dakota, public U.S. EPA records track 18 regulated facilities (#80 of 109 in South Dakota), including 1 (5.6%) High-Risk sites and $13,000 in federal penalties. Countywide due diligence also covers 0 Safe Drinking Water (SDWIS) facilities, 18 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).
Custer County, SD 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, SD Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 05, 2026)Municipalities in Custer County
ZIP Codes in Custer County
Top EPA Regulated Facilities in Custer County, SD
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 Regulated EPA Enforcement Record #1 | 🔒 Exact Street & Parcel Redacted • HERMOSA, SD (ZIP 57744 Sector) | MODERATE (22/100) | Resolved / Historical Non-Compliance (3 qtrs NC) | 🔒 $10,000+ Federal Fine • Unlock → |
| GOLF COURSE FORCE MAIN IMPROVEMENTS FREE PREVIEW (LOW RISK) | CANAL STREET & BLUEBELL LANE, CUSTER, SD 57730 | LOW (18/100) | No Violation Identified (0 qtrs NC) | $0 |
| V23003 - CUSTER WEST: CO TO RST 9 FREE PREVIEW (LOW RISK) | 30 N 5TH ST, CUSTER, SD 57730 | LOW (18/100) | No Violation Identified (0 qtrs NC) | $0 |
| WASTEWATER TREATMENT FACILITY IMPROVEMENTS PHASES FREE PREVIEW (LOW RISK) | 25058 SPRING PLACE TO US HWY 16 TO LOWER FRENCH CR, CUSTER, SD 57730 | LOW (16/100) | No Violation Identified (0 qtrs NC) | $0 |
| HERMOSA SCHOOL FREE PREVIEW (LOW RISK) | HWY 79 & MAIN ST, HERMOSA, SD 57744 | LOW (16/100) | No Violation Identified (0 qtrs NC) | $0 |
| 🔒 Locked Regulated EPA Enforcement Record #2 | 🔒 Exact Street & Parcel Redacted • HERMOSA, SD (ZIP 57744 Sector) | LOW (16/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • HERMOSA, SD (ZIP 57744 Sector) | LOW (13/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #4 | 🔒 Exact Street & Parcel Redacted • CUSTER, SD (ZIP 57730 Sector) | LOW (13/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #5 | 🔒 Exact Street & Parcel Redacted • CUSTER, SD (ZIP 57730 Sector) | LOW (12/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #6 | 🔒 Exact Street & Parcel Redacted • HERMOSA, SD (ZIP 57744 Sector) | LOW (12/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #7 | 🔒 Exact Street & Parcel Redacted • HERMOSA, SD (ZIP 57744 Sector) | LOW (12/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #8 | 🔒 Exact Street & Parcel Redacted • HERMOSA, SD (ZIP 57744 Sector) | LOW (12/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
Frequently Asked Questions — Custer County, South Dakota Environmental Due Diligence
How many EPA-regulated environmental sites are in Custer County County, South Dakota?
Public U.S. EPA records track 18 regulated facilities in Custer County County, South Dakota (ranking #80 of 109 jurisdictions in SD). Of those, 1 (5.6%) 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 Custer County County have the highest regulated facility density?
Within Custer County County, the highest concentrations of EPA-tracked facilities are located in ZIP 57744 (Hermosa, 18 sites), spanning municipal corridors including Hermosa (16 sites).
How many hazardous waste (RCRA) and toxic release (TRI) handlers operate in Custer County County?
Across Custer 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 Custer County County, SD?
Geologic indoor air screening places Custer 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 Custer County County, SD?
Federal records track 0 Safe Drinking Water (SDWIS) facilities, 18 Clean Water Act NPDES permits, and 6 impaired water dischargers in Custer County County, alongside 2 historical FEMA federal disaster declarations (0 flood/storm events).
Does Custer County, SD have expansive clay soil or foundation risk?
USDA regional soil engineering screening for Custer County indicates a HIGH 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.