Buffalo County, South Dakota — Property Hazard, Flood Zone, Soil, Water & EPA Guide
What Are the Flood, Soil Foundation & EPA Risks in Buffalo County, SD?
In Buffalo County, South Dakota, public U.S. EPA records track 22 regulated facilities (#66 of 109 in South Dakota), including 1 (4.5%) High-Risk sites and $0 in federal penalties. Countywide due diligence also covers 2 Safe Drinking Water (SDWIS) facilities, 12 Clean Water NPDES permits, 2 FEMA Federal Disaster Declarations (2 flood/storm), USDA Soil Foundation Shrink-Swell (MODERATE signal), and EPA Zone 1 — High Potential (> 4.0 pCi/L).
Buffalo 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📊 Buffalo County, SD Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 05, 2026)Municipalities in Buffalo County
ZIP Codes in Buffalo County
Top EPA Regulated Facilities in Buffalo 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 High-Risk EPA Enforcement Record #1 | 🔒 Exact Street & Parcel Redacted • FORT THOMPSON, SD (ZIP 57339 Sector) | HIGH (64/100) | Significant Violation (9 qtrs NC) | 🔒 9 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #2 | 🔒 Exact Street & Parcel Redacted • FORT THOMPSON, SD (ZIP 57339 Sector) | MODERATE (30/100) | Resolved / Historical Non-Compliance (1 qtrs NC) | 🔒 1 Qtrs Non-Compliance • Unlock → |
| FORT THOMPSON DRUMS FREE PREVIEW (LOW RISK) | 33816 BIA ROUTE 4, FORT THOMPSON, SD 57339 | LOW (16/100) | No Violation Identified (0 qtrs NC) | $0 |
| FREEMAN COOP FERTILIZER FREE PREVIEW (LOW RISK) | 101 NORTH MAIN, FREEMAN, SD 57029 | LOW (16/100) | No Violation Identified (0 qtrs NC) | $0 |
| BUFFALO COUNTY HIGHWAY SHOP FREE PREVIEW (LOW RISK) | E. MOUTTON AVE., GANN VALLEY, SD 57341 | LOW (16/100) | No Violation Identified (0 qtrs NC) | $0 |
| US ACOE: LAKE SHARPE PROJECT FREE PREVIEW (LOW RISK) | HWY 47 NORTH, FORT THOMPSON, SD 57339 | LOW (16/100) | No Violation Identified (0 qtrs NC) | $0 |
| 🔒 Locked Regulated EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • CHAMBERLAIN, SD (ZIP 57325 Sector) | LOW (13/100) | Inactive (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #4 | 🔒 Exact Street & Parcel Redacted • PLATTE COLONY, SD (ZIP 57369 Sector) | LOW (12/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #5 | 🔒 Exact Street & Parcel Redacted • FORT THOMPSON, SD (ZIP 57339 Sector) | LOW (12/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #6 | 🔒 Exact Street & Parcel Redacted • FORT THOMPSON, SD (ZIP 57339 Sector) | LOW (12/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #7 | 🔒 Exact Street & Parcel Redacted • FORT THOMPSON, SD (ZIP 57339 Sector) | LOW (10/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #8 | 🔒 Exact Street & Parcel Redacted • FORT THOMPSON, SD (ZIP 57339 Sector) | LOW (9/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
Frequently Asked Questions — Buffalo County, South Dakota Environmental Due Diligence
How many EPA-regulated environmental sites are in Buffalo County, South Dakota?
Public U.S. EPA records track 22 regulated facilities in Buffalo County, South Dakota (ranking #66 of 109 jurisdictions in SD). Of those, 1 (4.5%) 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 Buffalo County have the highest regulated facility density?
Within Buffalo County, the highest concentrations of EPA-tracked facilities are located in ZIP 57339 (Fort Thompson, 22 sites), spanning municipal corridors including Fort Thompson (22 sites), Platte Colony (1 sites).
How many hazardous waste (RCRA) and toxic release (TRI) handlers operate in Buffalo County?
Across Buffalo County, 5 facilities (22.7% 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 Buffalo County, SD?
Geologic indoor air screening places Buffalo 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 Buffalo County, SD?
Federal records track 2 Safe Drinking Water (SDWIS) facilities, 12 Clean Water Act NPDES permits, and 0 impaired water dischargers in Buffalo County, alongside 2 historical FEMA federal disaster declarations (2 flood/storm events).
Does Buffalo County, SD have expansive clay soil or foundation risk?
USDA regional soil engineering screening for Buffalo County indicates a MODERATE 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.