Gregory County, South Dakota — Property Hazard, Flood Zone, Soil, Water & EPA Guide
What Are the Flood, Soil Foundation & EPA Risks in Gregory County, SD?
In Gregory County, South Dakota, public U.S. EPA records track 23 regulated facilities (#63 of 109 in South Dakota), including 0 (0.0%) High-Risk sites and $0 in federal penalties. Countywide due diligence also covers 4 Safe Drinking Water (SDWIS) facilities, 10 Clean Water NPDES permits, 1 FEMA Federal Disaster Declarations (1 flood/storm), USDA Soil Foundation Shrink-Swell (HIGH signal), and EPA Zone 1 — High Potential (> 4.0 pCi/L).
Gregory 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📊 Gregory County, SD Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 03, 2026)Municipalities in Gregory County
ZIP Codes in Gregory County
Top EPA Regulated Facilities in Gregory 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 • FAIRFAX, SD (ZIP 57335 Sector) | MODERATE (25/100) | Resolved / Historical Non-Compliance (5 qtrs NC) | 🔒 5 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #2 | 🔒 Exact Street & Parcel Redacted • BONESTEEL, SD (ZIP 57317 Sector) | MODERATE (19/100) | Resolved / Historical Non-Compliance (1 qtrs NC) | 🔒 1 Qtrs Non-Compliance • Unlock → |
| HIGH PLAINS TRUCK AND TRAILER (FORMERLY MATHIS TRUCK SHOP) FREE PREVIEW (LOW RISK) | 1109 W. 2ND ST., WINNER, SD 57580 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| CENEX FREE PREVIEW (LOW RISK) | WEST HIGHWAY 18, GREGORY, SD 57533 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| RANCHERS LIVESTOCK EQUIPMENT, LLC. FREE PREVIEW (LOW RISK) | 100 AIRPORT ROAD, GREGORY, SD 57533 | LOW (16/100) | No Violation Identified (0 qtrs NC) | $0 |
| ROSEBUD AUTO PARTS INC FREE PREVIEW (LOW RISK) | 120 MAIN STREET, GREGORY, SD 57533 | LOW (16/100) | No Violation Identified (0 qtrs NC) | $0 |
| 🔒 Locked Regulated EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • BONESTEEL, SD (ZIP 57317 Sector) | LOW (16/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #4 | 🔒 Exact Street & Parcel Redacted • BURKE, SD (ZIP 57523 Sector) | LOW (16/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #5 | 🔒 Exact Street & Parcel Redacted • GREGORY, SD (ZIP 57533 Sector) | LOW (15/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #6 | 🔒 Exact Street & Parcel Redacted • BONESTEEL, SD (ZIP 57317 Sector) | LOW (15/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #7 | 🔒 Exact Street & Parcel Redacted • GREGORY, SD (ZIP 57533 Sector) | LOW (12/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #8 | 🔒 Exact Street & Parcel Redacted • GREGORY, SD (ZIP 57533 Sector) | LOW (12/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
Frequently Asked Questions — Gregory County, South Dakota Environmental Due Diligence
How many EPA-regulated environmental sites are in Gregory County, South Dakota?
Public U.S. EPA records track 23 regulated facilities in Gregory County, South Dakota (ranking #63 of 109 jurisdictions in SD). 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 Gregory County have the highest regulated facility density?
Within Gregory County, the highest concentrations of EPA-tracked facilities are located in ZIP 57533 (Gregory, 18 sites), ZIP 57317 (Bonesteel, 6 sites), ZIP 57523 (Burke, 4 sites), spanning municipal corridors including Gregory (13 sites), Bonesteel (6 sites), Fairfax (3 sites).
How many hazardous waste (RCRA) and toxic release (TRI) handlers operate in Gregory County?
Across Gregory County, 9 facilities (39.1% 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 Gregory County, SD?
Geologic indoor air screening places Gregory 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 Gregory County, SD?
Federal records track 4 Safe Drinking Water (SDWIS) facilities, 10 Clean Water Act NPDES permits, and 0 impaired water dischargers in Gregory County, alongside 1 historical FEMA federal disaster declarations (1 flood/storm events).
Does Gregory County, SD have expansive clay soil or foundation risk?
USDA regional soil engineering screening for Gregory County indicates a HIGH shrink-swell risk signal and steel pipe corrosivity rated High. Run a street address scan to unlock the exact parcel soil series, LEP %, and water table depth.