Sanborn County, South Dakota — Property Hazard, Flood Zone, Soil, Water & EPA Guide
What Are the Flood, Soil Foundation & EPA Risks in Sanborn County, SD?
In Sanborn County, South Dakota, public U.S. EPA records track 22 regulated facilities (#66 of 109 in South Dakota), including 0 (0.0%) High-Risk sites and $0 in federal penalties. Countywide due diligence also covers 5 Safe Drinking Water (SDWIS) facilities, 10 Clean Water NPDES permits, 1 FEMA Federal Disaster Declarations (1 flood/storm), USDA Soil Foundation Shrink-Swell (MODERATE signal), and EPA Zone 1 — High Potential (> 4.0 pCi/L).
Sanborn 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📊 Sanborn County, SD Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 05, 2026)Municipalities in Sanborn County
ZIP Codes in Sanborn County
Top EPA Regulated Facilities in Sanborn 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 • WOONSOCKET, SD (ZIP 57385 Sector) | MODERATE (33/100) | Violation Identified (9 qtrs NC) | 🔒 9 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #2 | 🔒 Exact Street & Parcel Redacted • ARTESIAN, SD (ZIP 57314 Sector) | MODERATE (30/100) | Resolved / Historical Non-Compliance (1 qtrs NC) | 🔒 1 Qtrs Non-Compliance • Unlock → |
| ABC SALVAGE FREE PREVIEW (LOW RISK) | MAIN ST., LETCHER, SD 57359 | LOW (16/100) | No Violation Identified (0 qtrs NC) | $0 |
| GROSZ MANUFACTURING FREE PREVIEW (LOW RISK) | RR 1, LETCHER, SD 57359 | LOW (16/100) | No Violation Identified (0 qtrs NC) | $0 |
| FARMERS UNION OIL SANBORN COUNTY FREE PREVIEW (LOW RISK) | HIGHWAY 34, WOONSOCKET, SD 57385 | LOW (16/100) | No Violation Identified (0 qtrs NC) | $0 |
| M J AVIATION FREE PREVIEW (LOW RISK) | 1 MI E OF LETCHER, LETCHER, SD 57359 | LOW (16/100) | No Violation Identified (0 qtrs NC) | $0 |
| 🔒 Locked Regulated EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • WOONSOCKET, SD (ZIP 57385 Sector) | LOW (15/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #4 | 🔒 Exact Street & Parcel Redacted • WOONSOCKET, SD (ZIP 57385 Sector) | LOW (13/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #5 | 🔒 Exact Street & Parcel Redacted • LETCHER, SD (ZIP 57359 Sector) | LOW (13/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #6 | 🔒 Exact Street & Parcel Redacted • ARTESIAN, SD (ZIP 57314 Sector) | LOW (13/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #7 | 🔒 Exact Street & Parcel Redacted • ARTESIAN, SD (ZIP 57314 Sector) | LOW (12/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #8 | 🔒 Exact Street & Parcel Redacted • , SD (ZIP Sector) | LOW (11/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
Frequently Asked Questions — Sanborn County, South Dakota Environmental Due Diligence
How many EPA-regulated environmental sites are in Sanborn County, South Dakota?
Public U.S. EPA records track 22 regulated facilities in Sanborn County, South Dakota (ranking #66 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 1 (4.5%) have active non-compliance quarters.
Which ZIP codes and cities in Sanborn County have the highest regulated facility density?
Within Sanborn County, the highest concentrations of EPA-tracked facilities are located in ZIP 57385 (Woonsocket, 14 sites), ZIP 57314 (Artesian, 9 sites), spanning municipal corridors including Woonsocket (13 sites), Artesian (8 sites).
How many hazardous waste (RCRA) and toxic release (TRI) handlers operate in Sanborn County?
Across Sanborn County, 6 facilities (27.3% 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 Sanborn County, SD?
Geologic indoor air screening places Sanborn 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 Sanborn County, SD?
Federal records track 5 Safe Drinking Water (SDWIS) facilities, 10 Clean Water Act NPDES permits, and 0 impaired water dischargers in Sanborn County, alongside 1 historical FEMA federal disaster declarations (1 flood/storm events).
Does Sanborn County, SD have expansive clay soil or foundation risk?
USDA regional soil engineering screening for Sanborn County indicates a MODERATE 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.