Hamlin County, South Dakota — Flood Zone, Water Quality, Soil Foundation, Radon & EPA Hazards
In Hamlin County, South Dakota, public U.S. EPA records track 25 regulated facilities (#60 of 109 in South Dakota), including 1 (4.0%) High-Risk sites and $0 in federal penalties. Countywide due diligence also covers 8 Safe Drinking Water (SDWIS) facilities, 24 Clean Water NPDES permits, 2 FEMA Federal Disaster Declarations (1 flood/storm), USDA Soil Foundation Shrink-Swell (MODERATE signal), and EPA Zone 1 — High Potential (> 4.0 pCi/L).
Hamlin 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📊 Hamlin County, SD Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 02, 2026)Municipalities in Hamlin County
ZIP Codes in Hamlin County
Top EPA Regulated Facilities in Hamlin 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 • LAKE NORDEN, SD (ZIP 57248 Sector) | HIGH (67/100) | Significant Violation (9 qtrs NC) | 🔒 9 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #2 | 🔒 Exact Street & Parcel Redacted • CASTLEWOOD, SD (ZIP 57223 Sector) | MODERATE (32/100) | Violation Identified (1 qtrs NC) | 🔒 1 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • , SD (ZIP Sector) | MODERATE (30/100) | Resolved / Historical Non-Compliance (2 qtrs NC) | 🔒 2 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #4 | 🔒 Exact Street & Parcel Redacted • BRYANT, SD (ZIP 57221 Sector) | MODERATE (28/100) | Violation Identified (7 qtrs NC) | 🔒 7 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #5 | 🔒 Exact Street & Parcel Redacted • ESTELLINE, SD (ZIP 57234 Sector) | MODERATE (21/100) | Significant Violation (3 qtrs NC) | 🔒 3 Qtrs Non-Compliance • Unlock → |
| DRUMGOON DIGESTER RENEWABLE ENERGY FREE PREVIEW (LOW RISK) | 45449 190TH STREET, LAKE NORDEN, SD 57248 | LOW (19/100) | No Violation Identified (0 qtrs NC) | $0 |
| NORTHERN BORDER PIPELINE COMPANY COMPRESSOR STATION #11 FREE PREVIEW (LOW RISK) | 18743 470TH AVENUE, ESTELLINE, SD 57234 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| TNT AUTO & COLLISION FREE PREVIEW (LOW RISK) | HIGHWAY 28, ESTELLINE, SD 57234 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| NORTHERN NATURAL GAS - BRYANT TBS FREE PREVIEW (LOW RISK) | 19247 SAUDER AVENUE, BRYANT, SD 57221 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| 🔒 Locked Regulated EPA Enforcement Record #6 | 🔒 Exact Street & Parcel Redacted • CASTLEWOOD, SD (ZIP 57223 Sector) | LOW (17/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #7 | 🔒 Exact Street & Parcel Redacted • ESTELLINE, SD (ZIP 57234 Sector) | LOW (16/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #8 | 🔒 Exact Street & Parcel Redacted • HAYTI, SD (ZIP 57241 Sector) | LOW (16/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
Frequently Asked Questions — Hamlin County, South Dakota Environmental Due Diligence
How many EPA-regulated environmental sites are in Hamlin County, South Dakota?
Public U.S. EPA records track 25 regulated facilities in Hamlin County, South Dakota (ranking #60 of 109 jurisdictions in SD). Of those, 1 (4.0%) are classified in the High-Risk tier due to significant enforcement or chemical release history, and 4 (16.0%) have active non-compliance quarters.
Which ZIP codes and cities in Hamlin County have the highest regulated facility density?
Within Hamlin County, the highest concentrations of EPA-tracked facilities are located in ZIP 57234 (Estelline, 16 sites), ZIP 57241 (Hayti, 3 sites), spanning municipal corridors including Estelline (15 sites), Hayti (3 sites).
How many hazardous waste (RCRA) and toxic release (TRI) handlers operate in Hamlin County?
Across Hamlin County, 9 facilities (36.0% 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 Hamlin County, SD?
Geologic indoor air screening places Hamlin 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 Hamlin County, SD?
Federal records track 8 Safe Drinking Water (SDWIS) facilities, 24 Clean Water Act NPDES permits, and 5 impaired water dischargers in Hamlin County, alongside 2 historical FEMA federal disaster declarations (1 flood/storm events).
Does Hamlin County, SD have expansive clay soil or foundation risk?
USDA regional soil engineering screening for Hamlin 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.