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 42 regulated facilities (#35 of 109 in South Dakota), including 1 (2.4%) High-Risk sites and $29,917 in federal penalties. Countywide due diligence also covers 5 Safe Drinking Water (SDWIS) facilities, 33 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 High-Risk EPA Enforcement Record #1 | 🔒 Exact Street & Parcel Redacted • MILBANK, SD (ZIP 57252 Sector) | HIGH (64/100) | Violation Identified (4 qtrs NC) | 🔒 $10,000+ Federal Fine • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #2 | 🔒 Exact Street & Parcel Redacted • BIG STONE CITY, SD (ZIP 57216 Sector) | MODERATE (47/100) | Violation Identified (1 qtrs NC) | 🔒 1 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • BIG STONE CITY, SD (ZIP 57216 Sector) | MODERATE (31/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #4 | 🔒 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 #5 | 🔒 Exact Street & Parcel Redacted • MILBANK, SD (ZIP 57252 Sector) | MODERATE (22/100) | Resolved / Historical Non-Compliance (1 qtrs NC) | 🔒 1 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #6 | 🔒 Exact Street & Parcel Redacted • LABOLT, SD (ZIP 57246 Sector) | MODERATE (22/100) | Resolved / Historical Non-Compliance (3 qtrs NC) | 🔒 3 Qtrs Non-Compliance • Unlock → |
| SAPUTO CHEESE USA INC FREE PREVIEW (LOW RISK) | 1051 LOCUST STREET, BIG STONE CITY, SD 57216 | LOW (19/100) | No Violation Identified (0 qtrs NC) | $0 |
| MILBANK SCHOOL DISTRICT 25-4 FREE PREVIEW (LOW RISK) | 1001 EAST PARK AVENUE, MILBANK, SD 57252 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| DAKOTA RANGE WIND FREE PREVIEW (LOW RISK) | 45912 149TH ST., MARVIN, SD 57251 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| REVILLO, TOWN OF FREE PREVIEW (LOW RISK) | 1/4MI E.OF TOWN NE1/4,NE1/4,SE, REVILLO, SD 57259 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| 🔒 Locked Regulated EPA Enforcement Record #7 | 🔒 Exact Street & Parcel Redacted • REVILLO, SD (ZIP 57259 Sector) | LOW (16/100) | 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 (16/100) | 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, South Dakota?
Public U.S. EPA records track 42 regulated facilities in Grant County, South Dakota (ranking #35 of 109 jurisdictions in SD). Of those, 1 (2.4%) are classified in the High-Risk tier due to significant enforcement or chemical release history, and 2 (4.8%) have active non-compliance quarters.
Which ZIP codes and cities in Grant County have the highest regulated facility density?
Within Grant County, the highest concentrations of EPA-tracked facilities are located in ZIP 57259 (Revillo, 12 sites), ZIP 57251 (Marvin, 3 sites), ZIP 57269 (Twin Brooks, 2 sites), spanning municipal corridors including Marvin (3 sites), Twin Brooks (2 sites), Stockholm (1 sites).
How many hazardous waste (RCRA) and toxic release (TRI) handlers operate in Grant County?
Across Grant County, 21 facilities (50.0% 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, SD?
Geologic indoor air screening places Grant 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, SD?
Federal records track 5 Safe Drinking Water (SDWIS) facilities, 33 Clean Water Act NPDES permits, and 1 impaired water dischargers in Grant 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.