Sioux County, Nebraska — Property Hazard, Flood Zone, Soil, Water & EPA Guide
What Are the Flood, Soil Foundation & EPA Risks in Sioux County, NE?
In Sioux County, Nebraska, public U.S. EPA records track 6 regulated facilities (#110 of 110 in Nebraska), including 0 (0.0%) High-Risk sites and $0 in federal penalties. Countywide due diligence also covers 3 Safe Drinking Water (SDWIS) facilities, 2 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).
Sioux County, NE 6-in-1 Flood, Soil Foundation, Tap Water & Radon Signals
🔒 Parcel-Level Soil LEP %, Water Table Depth & Flood Zone Require Street Address Scan📊 Sioux County, NE Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 05, 2026)Municipalities in Sioux County
ZIP Codes in Sioux County
Top EPA Regulated Facilities in Sioux County, NE
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 |
|---|---|---|---|---|
| SIOUX COUNTY HIGH SCHOOL FREE PREVIEW (LOW RISK) | 435 KATE, HARRISON, NE 69346 | LOW (15/100) | No Violation Identified (0 qtrs NC) | $0 |
| HARRISON BURN SITE FREE PREVIEW (LOW RISK) | 1ST ST, HARRISON, NE 69346 | LOW (12/100) | No Violation Identified (0 qtrs NC) | $0 |
| AGATE FOSSIL BEDS-20061 TREATMENT FREE PREVIEW (LOW RISK) | 301 RIVER ROAD, HARRISON, NE 69346 | LOW (12/100) | No Violation Identified (0 qtrs NC) | $0 |
| SOLDIER CREEK FREE PREVIEW (LOW RISK) | , , NE | LOW (10/100) | No Violation Identified (0 qtrs NC) | $0 |
| 🔒 Locked Regulated EPA Enforcement Record #1 | 🔒 Exact Street & Parcel Redacted • HARRISON, NE (ZIP 69346 Sector) | LOW (10/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
Frequently Asked Questions — Sioux County, Nebraska Environmental Due Diligence
How many EPA-regulated environmental sites are in Sioux County, Nebraska?
Public U.S. EPA records track 6 regulated facilities in Sioux County, Nebraska (ranking #110 of 110 jurisdictions in NE). Of those, 0 (0.0%) are classified in the High-Risk tier due to significant enforcement or chemical release history, and 0 (0.0%) have active non-compliance quarters.
Which ZIP codes and cities in Sioux County have the highest regulated facility density?
Within Sioux County, the highest concentrations of EPA-tracked facilities are located in ZIP 69346 (Harrison, 5 sites), spanning municipal corridors including Harrison (5 sites).
How many hazardous waste (RCRA) and toxic release (TRI) handlers operate in Sioux County?
Across Sioux County, 1 facilities (16.7% 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 Sioux County, NE?
Geologic indoor air screening places Sioux 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 Sioux County, NE?
Federal records track 3 Safe Drinking Water (SDWIS) facilities, 2 Clean Water Act NPDES permits, and 0 impaired water dischargers in Sioux County, alongside 2 historical FEMA federal disaster declarations (1 flood/storm events).
Does Sioux County, NE have expansive clay soil or foundation risk?
USDA regional soil engineering screening for Sioux 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.