Yankton County, South Dakota — Property Hazard, Flood Zone, Soil, Water & EPA Guide
What Are the Flood, Soil Foundation & EPA Risks in Yankton County, SD?
In Yankton County, South Dakota, public U.S. EPA records track 124 regulated facilities (#12 of 109 in South Dakota), including 2 (1.6%) High-Risk sites and $5,300,000 in federal penalties. Countywide due diligence also covers 11 Safe Drinking Water (SDWIS) facilities, 78 Clean Water NPDES permits, 1 FEMA Federal Disaster Declarations (1 flood/storm), USDA Soil Foundation Shrink-Swell (LOW signal), and EPA Zone 1 — High Potential (> 4.0 pCi/L).
Yankton 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📊 Yankton County, SD Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 03, 2026)Municipalities in Yankton County
ZIP Codes in Yankton County
Top EPA Regulated Facilities in Yankton 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 • YANKTON, SD (ZIP 57078 Sector) | MODERATE (35/100) | Violation Identified (3 qtrs NC) | 🔒 3 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #2 | 🔒 Exact Street & Parcel Redacted • YANKTON, SD (ZIP 57078 Sector) | MODERATE (35/100) | Resolved / Historical Non-Compliance (2 qtrs NC) | 🔒 2 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • YANKTON, SD (ZIP 57078 Sector) | MODERATE (35/100) | Resolved / Historical Non-Compliance (1 qtrs NC) | 🔒 1 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #4 | 🔒 Exact Street & Parcel Redacted • YANKTON, SD (ZIP 57078 Sector) | MODERATE (34/100) | No Violation Identified (0 qtrs NC) | 🔒 $100,000+ Federal Fine • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #5 | 🔒 Exact Street & Parcel Redacted • YANKTON, SD (ZIP 57078 Sector) | MODERATE (34/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #6 | 🔒 Exact Street & Parcel Redacted • YANKTON, SD (ZIP 57078 Sector) | MODERATE (34/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #7 | 🔒 Exact Street & Parcel Redacted • YANKTON, SD (ZIP 57078 Sector) | MODERATE (34/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #8 | 🔒 Exact Street & Parcel Redacted • YANKTON, SD (ZIP 57078 Sector) | MODERATE (33/100) | Resolved / Historical Non-Compliance (1 qtrs NC) | 🔒 1 Qtrs Non-Compliance • Unlock → |
| USFWS - GAVINS POINT NATIONAL FISH HATCHERY FREE PREVIEW (LOW RISK) | SW1/4,SEC.16,T93N,R56W,APPROX., YANKTON, SD 57078 | LOW (24/100) | No Violation Identified (0 qtrs NC) | $0 |
| APPLIED ENGINEERING FREE PREVIEW (LOW RISK) | 2008 EAST HIGHWAY 50, YANKTON, SD 57078 | LOW (19/100) | No Violation Identified (0 qtrs NC) | $0 |
| FREEMAN CO AMG LLC FREE PREVIEW (LOW RISK) | 719 WALNUT STREET, YANKTON, SD 57078 | LOW (18/100) | No Violation Identified (0 qtrs NC) | $0 |
| MOUNT MARTY UNIVERSITY FREE PREVIEW (LOW RISK) | 1105 WEST 8TH STREET, YANKTON, SD 57078 | LOW (18/100) | No Violation Identified (0 qtrs NC) | $0 |
Frequently Asked Questions — Yankton County, South Dakota Environmental Due Diligence
How many EPA-regulated environmental sites are in Yankton County, South Dakota?
Public U.S. EPA records track 124 regulated facilities in Yankton County, South Dakota (ranking #12 of 109 jurisdictions in SD). Of those, 2 (1.6%) are classified in the High-Risk tier due to significant enforcement or chemical release history, and 2 (1.6%) have active non-compliance quarters.
Which ZIP codes and cities in Yankton County have the highest regulated facility density?
Within Yankton County, the highest concentrations of EPA-tracked facilities are located in ZIP 57031 (Gayville, 7 sites), ZIP 57072 (Volin, 1 sites), spanning municipal corridors including Gayville (6 sites), Yankton, City Of (1 sites), Volin (1 sites).
How many hazardous waste (RCRA) and toxic release (TRI) handlers operate in Yankton County?
Across Yankton County, 84 facilities (67.7% 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 Yankton County, SD?
Geologic indoor air screening places Yankton 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 Yankton County, SD?
Federal records track 11 Safe Drinking Water (SDWIS) facilities, 78 Clean Water Act NPDES permits, and 10 impaired water dischargers in Yankton County, alongside 1 historical FEMA federal disaster declarations (1 flood/storm events).
Does Yankton County, SD have expansive clay soil or foundation risk?
USDA regional soil engineering screening for Yankton County indicates a LOW 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.