Grant County, South Dakota — Property Hazard, Flood Zone, Soil, Water & EPA Guide
What Are the Flood, Soil Foundation & EPA Risks in Grant County, SD?
In Grant County, South Dakota, public U.S. EPA records track 26 regulated facilities (#57 of 109 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, 22 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).
Grant 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📊 Grant County, SD Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 03, 2026)Municipalities in Grant County
ZIP Codes in Grant County
Top EPA Regulated Facilities in Grant 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 • TWIN BROOKS, SD (ZIP 57269 Sector) | MODERATE (30/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #2 | 🔒 Exact Street & Parcel Redacted • BIG STONE CITY, SD (ZIP 57216 Sector) | MODERATE (30/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| BRANDT TO BIG STONE NATURAL GAS LINE FREE PREVIEW (LOW RISK) | 497TH AVE & 151ST STREET TO 497TH AVE & 155TH STRE, MILBANK, SD 57252 | LOW (13/100) | No Violation Identified (0 qtrs NC) | $0 |
| PEACEFUL PINES 5 - MILBANK FREE PREVIEW (LOW RISK) | E 10TH AVE & S 4TH ST, MILBANK, SD 57252 | LOW (13/100) | No Violation Identified (0 qtrs NC) | $0 |
| KNOPP STOCKPILE SITE FREE PREVIEW (LOW RISK) | HWY 15 & 168TH STREET, REVILLO, SD 57259 | LOW (13/100) | No Violation Identified (0 qtrs NC) | $0 |
| VICTORY FARMS RENEWABLE ENERGY LLC FREE PREVIEW (LOW RISK) | 15987 480TH AVE, REVILLO, SD 57259 | LOW (13/100) | No Violation Identified (0 qtrs NC) | $0 |
| 🔒 Locked Regulated EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • REVILLO, SD (ZIP 57259 Sector) | LOW (12/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #4 | 🔒 Exact Street & Parcel Redacted • MILBANK, SD (ZIP 57252 Sector) | LOW (12/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #5 | 🔒 Exact Street & Parcel Redacted • BIG STONE CITY, SD (ZIP 57216 Sector) | LOW (12/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #6 | 🔒 Exact Street & Parcel Redacted • BIG STONE, SD (ZIP 57216 Sector) | LOW (12/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #7 | 🔒 Exact Street & Parcel Redacted • REVILLO, SD (ZIP 57259 Sector) | LOW (12/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #8 | 🔒 Exact Street & Parcel Redacted • MILBANK, SD (ZIP 57252 Sector) | LOW (12/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
Frequently Asked Questions — Grant County, South Dakota Environmental Due Diligence
How many EPA-regulated environmental sites are in Grant County County, South Dakota?
Public U.S. EPA records track 26 regulated facilities in Grant County County, South Dakota (ranking #57 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 Grant County County have the highest regulated facility density?
Within Grant County County, the highest concentrations of EPA-tracked facilities are located in ZIP 57252 (Milbank, 38 sites), ZIP 57216 (Big Stone City, 14 sites), ZIP 57246 (Labolt, 6 sites), spanning municipal corridors including Milbank (38 sites), Big Stone (2 sites).
How many hazardous waste (RCRA) and toxic release (TRI) handlers operate in Grant County County?
Across Grant 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 Grant County County, SD?
Geologic indoor air screening places Grant 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 Grant County County, SD?
Federal records track 0 Safe Drinking Water (SDWIS) facilities, 22 Clean Water Act NPDES permits, and 0 impaired water dischargers in Grant County County, alongside 2 historical FEMA federal disaster declarations (2 flood/storm events).
Does Grant County, SD have expansive clay soil or foundation risk?
USDA regional soil engineering screening for Grant 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.