Sioux County, North Dakota — Property Hazard, Flood Zone, Soil, Water & EPA Guide
What Are the Flood, Soil Foundation & EPA Risks in Sioux County, ND?
In Sioux County, North Dakota, public U.S. EPA records track 28 regulated facilities (#46 of 75 in North Dakota), including 0 (0.0%) High-Risk sites and $0 in federal penalties. Countywide due diligence also covers 2 Safe Drinking Water (SDWIS) facilities, 31 Clean Water NPDES permits, 2 FEMA Federal Disaster Declarations (2 flood/storm), USDA Soil Foundation Shrink-Swell (LOW signal), and EPA Zone 1 — High Potential (> 4.0 pCi/L).
Sioux County, ND 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, ND 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, ND
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 • FORT YATES, ND (ZIP 58538 Sector) | MODERATE (30/100) | Resolved / Historical Non-Compliance (8 qtrs NC) | 🔒 8 Qtrs Non-Compliance • Unlock → |
| SOLEN LAGOON FREE PREVIEW (LOW RISK) | 308 LEACH ST, SOLEN, ND 58570 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| STANDING ROCK AGENCY FREE PREVIEW (LOW RISK) | STANDING ROCK AGENCY, FORT YATES, ND 58538 | LOW (16/100) | No Violation Identified (0 qtrs NC) | $0 |
| MORTON & SIOUX CO - CANNONBALL RIVER BR | PCN 23771 FREE PREVIEW (LOW RISK) | (UNKNOWN ADDRESS), (UNKNOWN CITY), ND 00000 | LOW (16/100) | No Violation Identified (0 qtrs NC) | $0 |
| CANNONBALL STANDING ROCK WTP FREE PREVIEW (LOW RISK) | R79W, T134W SEC27, NE1/4 SW1/4, CANNONBALL, ND 58528 | LOW (13/100) | No Violation Identified (0 qtrs NC) | $0 |
| 🔒 Locked Regulated EPA Enforcement Record #2 | 🔒 Exact Street & Parcel Redacted • SELFRIDGE, ND (ZIP Sector) | LOW (12/100) | Inactive (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • FORT YATES, ND (ZIP 58538 Sector) | LOW (12/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #4 | 🔒 Exact Street & Parcel Redacted • FORT YATES, ND (ZIP 58538 Sector) | LOW (12/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #5 | 🔒 Exact Street & Parcel Redacted • SOLEN, ND (ZIP 58570 Sector) | LOW (12/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #6 | 🔒 Exact Street & Parcel Redacted • SOLEN, ND (ZIP 58570 Sector) | LOW (12/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #7 | 🔒 Exact Street & Parcel Redacted • SOLEN, ND (ZIP Sector) | LOW (11/100) | Inactive (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #8 | 🔒 Exact Street & Parcel Redacted • FORT YATES, ND (ZIP 58538 Sector) | LOW (11/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
Frequently Asked Questions — Sioux County, North Dakota Environmental Due Diligence
How many EPA-regulated environmental sites are in Sioux County, North Dakota?
Public U.S. EPA records track 28 regulated facilities in Sioux County, North Dakota (ranking #46 of 75 jurisdictions in ND). 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 58568 (Elgin, 12 sites), ZIP 58528 (Cannon Ball, 3 sites), spanning municipal corridors including Selfridge (10 sites), Cannonball (2 sites), Cannon Ball (1 sites).
How many hazardous waste (RCRA) and toxic release (TRI) handlers operate in Sioux County?
Across Sioux County, 1 facilities (3.6% 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, ND?
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, ND?
Federal records track 2 Safe Drinking Water (SDWIS) facilities, 31 Clean Water Act NPDES permits, and 3 impaired water dischargers in Sioux County, alongside 2 historical FEMA federal disaster declarations (2 flood/storm events).
Does Sioux County, ND have expansive clay soil or foundation risk?
USDA regional soil engineering screening for Sioux 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.