ZIP 51111 (Sioux City, IA) — Flood Zone, Water Quality, Soil Foundation, Radon & EPA Hazards
ZIP code 51111 in Sioux City, Iowa (Woodbury County) has 49 EPA-tracked facilities, including 1 High-Risk sites (2.0%), 1 active violators, and $10,000 in federal penalties. Beyond industrial pollution, properties in ZIP 51111 are screened across 2 historical Woodbury County FEMA disasters, USDA Soil Foundation Shrink-Swell (MODERATE signal), Tap Water & Watershed Permits (4), and EPA Zone 1 — High Potential (> 4.0 pCi/L).
ZIP 51111 (Sioux City, IA) 6-in-1 Flood, Soil Foundation, Tap Water & Radon Signals
🔒 Parcel-Level Soil LEP %, Water Table Depth & Flood Zone Require Street Address Scan📊 ZIP 51111 (Sioux City, IA) Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 01, 2026)ZIP 51111 Sector Screening Map (High-Risk Pin Coordinates Locked)
Exact street pins for 1 High-Risk and 1 Active Violation sites are redacted on public directory maps.
Regulated EPA Facilities in ZIP 51111 (Sioux City, IA)
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 Score (0–100) | Compliance Status | Enforcement / Unlock |
|---|---|---|---|---|
| 🔒 Locked Regulated EPA Enforcement Record #1 | 🔒 Exact Street & Parcel Redacted • SIOUX CITY, IA (ZIP 51111 Sector) | MODERATE (51/100) | Resolved / Historical Non-Compliance (2 qtrs NC) | 🔒 $10,000+ Federal Fine • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #2 | 🔒 Exact Street & Parcel Redacted • SIOUX CITY, IA (ZIP 51111 Sector) | MODERATE (35/100) | Resolved / Historical Non-Compliance (3 qtrs NC) | 🔒 3 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • SIOUX CITY, IA (ZIP 51111 Sector) | MODERATE (33/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #4 | 🔒 Exact Street & Parcel Redacted • CITY OF SIOUX CITY, IA (ZIP 51111 Sector) | MODERATE (30/100) | Violation Identified (2 qtrs NC) | 🔒 2 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #5 | 🔒 Exact Street & Parcel Redacted • SIOUX CITY, IA (ZIP 51111 Sector) | MODERATE (30/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #6 | 🔒 Exact Street & Parcel Redacted • SIOUX CITY, IA (ZIP 51111 Sector) | MODERATE (30/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #7 | 🔒 Exact Street & Parcel Redacted • SIOUX CITY, IA (ZIP 51111 Sector) | MODERATE (30/100) | Resolved / Historical Non-Compliance (1 qtrs NC) | 🔒 1 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #8 | 🔒 Exact Street & Parcel Redacted • SIOUX CITY, IA (ZIP 51111 Sector) | MODERATE (30/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| MOBREN BIOLOGICAL FREE PREVIEW (LOW RISK) | 2300 MURRAY ST, SIOUX CITY, IA 51111 | LOW (19/100) | No Violation Identified (0 qtrs NC) | $0 |
| WESTROCK CONVERTING COMPANY FREE PREVIEW (LOW RISK) | 2300 BRIDGEPORT DRIVE, SIOUX CITY, IA 51111 | LOW (18/100) | No Violation Identified (0 qtrs NC) | $0 |
| IOWA AIR NATIONAL GUARD FREE PREVIEW (LOW RISK) | 2920 HEADQUARTERS AVE, SIOUX CITY, IA 51111 | LOW (18/100) | No Violation Identified (0 qtrs NC) | $0 |
| STEFFEN TRUCK EQUIPMENT FREE PREVIEW (LOW RISK) | 5430 HARBOR DR, SIOUX CITY, IA 51111 | LOW (18/100) | No Violation Identified (0 qtrs NC) | $0 |
Frequently Asked Questions — ZIP 51111 (Sioux City, IA) EPA Dataset & Radon
DATASET: U.S. EPA ECHO • FRS • RCRAInfo • TRI (November 01, 2026)How many EPA-tracked environmental sites are in ZIP code 51111 (Sioux City, IA)?
ZIP code 51111 (Sioux City, IA) contains 49 EPA-tracked facilities, of which 1 (2.0%) are classified in the High-Risk tier, 1 (2.0%) have active compliance violations, and 35 (71.4%) handle RCRA hazardous waste.
How does ZIP 51111 compare to Woodbury County and Iowa averages?
In ZIP 51111, 2.0% of regulated sites are rated High Risk, compared to 0.8% across Woodbury County and 1.6% statewide in Iowa.
What is the EPA Radon Zone and ASTM Phase I screening radius for ZIP 51111?
Geologic screening places ZIP 51111 in EPA Zone 1 — High Potential (> 4.0 pCi/L). Property buyers should screen a 0.25-mile immediate buffer for vapor-intrusion sources and a 1.0-mile radius for CERCLA/RCRA sites.
Is ZIP 51111 (Sioux City, IA) in a FEMA flood zone and what is the flood disaster history?
Woodbury County has recorded 2 historical FEMA federal disaster declarations (1 flood, hurricane, or severe storm declarations). Run a street address scan in ZIP 51111 to unlock the exact parcel FEMA flood zone (AE / VE / X) and mandatory flood insurance status.
Does ZIP 51111 have expansive clay soil, foundation problems, or drinking water violations?
USDA regional soil screening for ZIP 51111 indicates a MODERATE shrink-swell risk signal. Within ZIP 51111, federal registries track 0 SDWIS drinking water facilities, 4 Clean Water NPDES permits, and 1 impaired water body dischargers. Unlock a full property report for exact soil LEP %, water table depth, and utility violation dockets.