Walworth County, South Dakota — Property Hazard, Flood Zone, Soil, Water & EPA Guide
What Are the Flood, Soil Foundation & EPA Risks in Walworth County, SD?
In Walworth County, South Dakota, public U.S. EPA records track 7 regulated facilities (#115 of 115 in South Dakota), including 0 (0.0%) High-Risk sites and $0 in federal penalties. Countywide due diligence also covers 0 Safe Drinking Water (SDWIS) facilities, 7 Clean Water NPDES permits, 15 FEMA Federal Disaster Declarations (8 flood/storm), USDA Soil Foundation Shrink-Swell (MODERATE signal), and EPA Zone 1 — High Potential (> 4.0 pCi/L).
Walworth 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📊 Walworth County, SD Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 03, 2026)Municipalities in Walworth County
ZIP Codes in Walworth County
Top EPA Regulated Facilities in Walworth 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 |
|---|---|---|---|---|
| RENOVATION AND ADDITION FREE PREVIEW (LOW RISK) | 1401 19TH AVENUE W, MOBRIDGE, SD 57601 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| SELBY WASTEWATER SYSTEM IMPROVEMENTS FREE PREVIEW (LOW RISK) | CITYWIDE, SELBY, SD 57472 | LOW (12/100) | No Violation Identified (0 qtrs NC) | $0 |
| LAKE HIDDENWOOD STATE PARK ACCESS ROAD FREE PREVIEW (LOW RISK) | E OF 309TH AVE & HIDDENWOOD RD, SELBY, SD 57472 | LOW (12/100) | No Violation Identified (0 qtrs NC) | $0 |
| GLENHAM, TOWN OF FREE PREVIEW (LOW RISK) | PO BOX 14, GLENHAM, SD 57631 | LOW (11/100) | No Violation Identified (0 qtrs NC) | $0 |
| 🔒 Locked Regulated EPA Enforcement Record #1 | 🔒 Exact Street & Parcel Redacted • HOVEN, SD (ZIP 57450 Sector) | LOW (11/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #2 | 🔒 Exact Street & Parcel Redacted • MOBRIDGE, SD (ZIP 57601 Sector) | LOW (11/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • MOBRIDGE, SD (ZIP 57601 Sector) | LOW (11/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
Frequently Asked Questions — Walworth County, South Dakota Environmental Due Diligence
How many EPA-regulated environmental sites are in Walworth County County, South Dakota?
Public U.S. EPA records track 7 regulated facilities in Walworth County County, South Dakota (ranking #115 of 115 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 Walworth County County have the highest regulated facility density?
Within Walworth County County, the highest concentrations of EPA-tracked facilities are located in ZIP 57631 (Glenham, 2 sites), spanning municipal corridors including Glenham (2 sites).
How many hazardous waste (RCRA) and toxic release (TRI) handlers operate in Walworth County County?
Across Walworth 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 Walworth County County, SD?
Geologic indoor air screening places Walworth 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 Walworth County County, SD?
Federal records track 0 Safe Drinking Water (SDWIS) facilities, 7 Clean Water Act NPDES permits, and 1 impaired water dischargers in Walworth County County, alongside 15 historical FEMA federal disaster declarations (8 flood/storm events).
Does Walworth County, SD have expansive clay soil or foundation risk?
USDA regional soil engineering screening for Walworth 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.