Sully County, South Dakota — Property Hazard, Flood Zone, Soil, Water & EPA Guide
What Are the Flood, Soil Foundation & EPA Risks in Sully County, SD?
In Sully County, South Dakota, public U.S. EPA records track 5 regulated facilities (#126 of 126 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, 5 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).
Sully 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📊 Sully County, SD Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 05, 2026)Municipalities in Sully County
ZIP Codes in Sully County
Top EPA Regulated Facilities in Sully 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 |
|---|---|---|---|---|
| SPRING CREEK BAY SUBDIVISION FREE PREVIEW (LOW RISK) | SPRING CREEK RD & SPRING CREEK TRAIL, PIERRE, SD 57501 | LOW (16/100) | No Violation Identified (0 qtrs NC) | $0 |
| CODGERS COVE RV PARK FREE PREVIEW (LOW RISK) | 196TH STREET (SPRING CREEK PLACE), PIERRE, SD 57501 | LOW (16/100) | No Violation Identified (0 qtrs NC) | $0 |
| ONIDA UTILITY IMPROVEMENTS FREE PREVIEW (LOW RISK) | THROUGHOUT ONIDA, ONIDA, SD 57564 | LOW (13/100) | No Violation Identified (0 qtrs NC) | $0 |
| BRF 6235(00)19-1 FREE PREVIEW (LOW RISK) | 185TH STREET OVER MEDICINE KNOLL CREEK, ONIDA, SD 57564 | LOW (12/100) | No Violation Identified (0 qtrs NC) | $0 |
| 🔒 Locked Regulated EPA Enforcement Record #1 | 🔒 Exact Street & Parcel Redacted • ONIDA, SD (ZIP 57564 Sector) | LOW (11/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
Frequently Asked Questions — Sully County, South Dakota Environmental Due Diligence
How many EPA-regulated environmental sites are in Sully County County, South Dakota?
Public U.S. EPA records track 5 regulated facilities in Sully County County, South Dakota (ranking #126 of 126 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 Sully County County have the highest regulated facility density?
Within Sully County County, the highest concentrations of EPA-tracked facilities are located in local postal sectors, spanning municipal corridors including Sully County.
How many hazardous waste (RCRA) and toxic release (TRI) handlers operate in Sully County County?
Across Sully 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 Sully County County, SD?
Geologic indoor air screening places Sully 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 Sully County County, SD?
Federal records track 0 Safe Drinking Water (SDWIS) facilities, 5 Clean Water Act NPDES permits, and 2 impaired water dischargers in Sully County County, alongside 15 historical FEMA federal disaster declarations (8 flood/storm events).
Does Sully County, SD have expansive clay soil or foundation risk?
USDA regional soil engineering screening for Sully 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.