Day County, South Dakota — Flood Zone, Water Quality, Soil Foundation, Radon & EPA Hazards
In Day County, South Dakota, public U.S. EPA records track 40 regulated facilities (#38 of 109 in South Dakota), including 1 (2.5%) High-Risk sites and $34,188 in federal penalties. Countywide due diligence also covers 7 Safe Drinking Water (SDWIS) facilities, 21 Clean Water NPDES permits, 4 FEMA Federal Disaster Declarations (3 flood/storm), USDA Soil Foundation Shrink-Swell (MODERATE signal), and EPA Zone 1 — High Potential (> 4.0 pCi/L).
Day 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📊 Day County, SD Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 01, 2026)Municipalities in Day County
Top EPA Regulated Facilities in Day 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 • WEBSTER, SD (ZIP 57274 Sector) | HIGH (68/100) | Significant Violation (6 qtrs NC) | 🔒 $10,000+ Federal Fine • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #2 | 🔒 Exact Street & Parcel Redacted • WEBSTER, SD (ZIP 57274 Sector) | MODERATE (30/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • , SD (ZIP Sector) | MODERATE (30/100) | Resolved / Historical Non-Compliance (1 qtrs NC) | 🔒 1 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #4 | 🔒 Exact Street & Parcel Redacted • , SD (ZIP Sector) | MODERATE (30/100) | Resolved / Historical Non-Compliance (5 qtrs NC) | 🔒 5 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #5 | 🔒 Exact Street & Parcel Redacted • ANDOVER, SD (ZIP 57422 Sector) | MODERATE (25/100) | Violation Identified (4 qtrs NC) | 🔒 4 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #6 | 🔒 Exact Street & Parcel Redacted • ROSLYN, SD (ZIP 57261 Sector) | MODERATE (21/100) | Resolved / Historical Non-Compliance (2 qtrs NC) | 🔒 2 Qtrs Non-Compliance • Unlock → |
| MEREEN-JOHNSON MACHINE CO FREE PREVIEW (LOW RISK) | NORTH INDUSTRIAL BLVD., WEBSTER, SD 57274 | LOW (18/100) | No Violation Identified (0 qtrs NC) | $0 |
| NORTHWESTERN PUBLIC SERVICE COMPANY FREE PREVIEW (LOW RISK) | 320 EAST 5TH AVENUE, WEBSTER, SD 57274 | LOW (18/100) | No Violation Identified (0 qtrs NC) | $0 |
| BRISTOL SCHOOL FREE PREVIEW (LOW RISK) | 500 SOUTH 3RD STREET, BRISTOL, SD 57219 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| ESCO MANUFACTURING, INC. FREE PREVIEW (LOW RISK) | 1731 COMMERCE LANE, WEBSTER, SD 57274 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| 🔒 Locked Regulated EPA Enforcement Record #7 | 🔒 Exact Street & Parcel Redacted • WEBSTER, SD (ZIP 57274 Sector) | LOW (17/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #8 | 🔒 Exact Street & Parcel Redacted • WEBSTER, SD (ZIP 57274 Sector) | LOW (16/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
Frequently Asked Questions — Day County, South Dakota Environmental Due Diligence
How many EPA-regulated environmental sites are in Day County, South Dakota?
Public U.S. EPA records track 40 regulated facilities in Day County, South Dakota (ranking #38 of 109 jurisdictions in SD). Of those, 1 (2.5%) are classified in the High-Risk tier due to significant enforcement or chemical release history, and 2 (5.0%) have active non-compliance quarters.
Which ZIP codes and cities in Day County have the highest regulated facility density?
Within Day County, the highest concentrations of EPA-tracked facilities are located in ZIP 57274 (Webster, 22 sites), ZIP 57468 (Pierpont, 6 sites), ZIP 57219 (Bristol, 5 sites), spanning municipal corridors including Webster (22 sites), Pierpont (6 sites), Bristol (5 sites).
How many hazardous waste (RCRA) and toxic release (TRI) handlers operate in Day County?
Across Day County, 18 facilities (45.0% 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 Day County, SD?
Geologic indoor air screening places Day 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 Day County, SD?
Federal records track 7 Safe Drinking Water (SDWIS) facilities, 21 Clean Water Act NPDES permits, and 0 impaired water dischargers in Day County, alongside 4 historical FEMA federal disaster declarations (3 flood/storm events).
Does Day County, SD have expansive clay soil or foundation risk?
USDA regional soil engineering screening for Day 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.