Lake County, South Dakota — Property Hazard, Flood Zone, Soil, Water & EPA Guide
What Are the Flood, Soil Foundation & EPA Risks in Lake County, SD?
In Lake County, South Dakota, public U.S. EPA records track 61 regulated facilities (#22 of 109 in South Dakota), including 1 (1.6%) High-Risk sites and $0 in federal penalties. Countywide due diligence also covers 7 Safe Drinking Water (SDWIS) facilities, 30 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).
Lake 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📊 Lake County, SD Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 05, 2026)Municipalities in Lake County
ZIP Codes in Lake County
Top EPA Regulated Facilities in Lake 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 • WENTWORTH, SD (ZIP 57075 Sector) | MODERATE (51/100) | Violation Identified (5 qtrs NC) | 🔒 5 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #2 | 🔒 Exact Street & Parcel Redacted • MADISON, SD (ZIP 57042 Sector) | MODERATE (34/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • MADISON, SD (ZIP 57042 Sector) | MODERATE (34/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #4 | 🔒 Exact Street & Parcel Redacted • MADISON, SD (ZIP 57042 Sector) | MODERATE (30/100) | Resolved / Historical Non-Compliance (1 qtrs NC) | 🔒 1 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #5 | 🔒 Exact Street & Parcel Redacted • MADISON, SD (ZIP 57042 Sector) | MODERATE (30/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #6 | 🔒 Exact Street & Parcel Redacted • RAMONA, SD (ZIP 57054 Sector) | MODERATE (23/100) | Resolved / Historical Non-Compliance (2 qtrs NC) | 🔒 2 Qtrs Non-Compliance • Unlock → |
| PERSONA, INC. FREE PREVIEW (LOW RISK) | 1001 SOUTHWEST 1ST STREET, MADISON, SD 57042 | LOW (20/100) | No Violation Identified (0 qtrs NC) | $0 |
| ARCTIC CAT INC. FREE PREVIEW (LOW RISK) | 701 SOUTHEAST 12TH STREET, MADISON, SD 57042 | LOW (20/100) | No Violation Identified (0 qtrs NC) | $0 |
| MIDWEST TRUCKING (FORMER MADISON METAL) FREE PREVIEW (LOW RISK) | 1606 NORTHEAST 3RD, MADISON, SD 57042 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| MAY CONSTRUCTION (FORMER LOCATION OF JAMES RIVER EQUIPMENT COMPANY) FREE PREVIEW (LOW RISK) | 23484 455TH AVENUE, MADISON, SD 57042 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| 🔒 Locked Regulated EPA Enforcement Record #7 | 🔒 Exact Street & Parcel Redacted • MADISON, SD (ZIP 57042 Sector) | LOW (17/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #8 | 🔒 Exact Street & Parcel Redacted • MADISON, SD (ZIP 57042 Sector) | LOW (16/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
Frequently Asked Questions — Lake County, South Dakota Environmental Due Diligence
How many EPA-regulated environmental sites are in Lake County, South Dakota?
Public U.S. EPA records track 61 regulated facilities in Lake County, South Dakota (ranking #22 of 109 jurisdictions in SD). Of those, 1 (1.6%) are classified in the High-Risk tier due to significant enforcement or chemical release history, and 1 (1.6%) have active non-compliance quarters.
Which ZIP codes and cities in Lake County have the highest regulated facility density?
Within Lake County, the highest concentrations of EPA-tracked facilities are located in ZIP 57042 (Madison, 77 sites), ZIP 57016 (Chester, 5 sites), ZIP 57054 (Ramona, 4 sites), spanning municipal corridors including Unk (22 sites), Chester (5 sites), Ramona (3 sites).
How many hazardous waste (RCRA) and toxic release (TRI) handlers operate in Lake County?
Across Lake County, 31 facilities (50.8% 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 Lake County, SD?
Geologic indoor air screening places Lake 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 Lake County, SD?
Federal records track 7 Safe Drinking Water (SDWIS) facilities, 30 Clean Water Act NPDES permits, and 4 impaired water dischargers in Lake County, alongside 2 historical FEMA federal disaster declarations (2 flood/storm events).
Does Lake County, SD have expansive clay soil or foundation risk?
USDA regional soil engineering screening for Lake 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.