ZIP 50401 (Mason City, IA) — Flood Zone, Water Quality, Soil Foundation, Radon & EPA Hazards
ZIP code 50401 in Mason City, Iowa (Cerro Gordo County) has 206 EPA-tracked facilities, including 7 High-Risk sites (3.4%), 5 active violators, and $5,524,110 in federal penalties. Beyond industrial pollution, properties in ZIP 50401 are screened across 7 historical Cerro Gordo County FEMA disasters, USDA Soil Foundation Shrink-Swell (HIGH signal), Tap Water & Watershed Permits (14), and EPA Zone 1 — High Potential (> 4.0 pCi/L).
ZIP 50401 (Mason 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 50401 (Mason City, IA) Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 01, 2026)ZIP 50401 Sector Screening Map (High-Risk Pin Coordinates Locked)
Exact street pins for 7 High-Risk and 5 Active Violation sites are redacted on public directory maps.
Regulated EPA Facilities in ZIP 50401 (Mason 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 High-Risk EPA Enforcement Record #1 | 🔒 Exact Street & Parcel Redacted • MASON CITY, IA (ZIP 50401 Sector) | HIGH (90/100) | Significant Violation (12 qtrs NC) | 🔒 $100,000+ Federal Fine • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #2 | 🔒 Exact Street & Parcel Redacted • MASON CITY, IA (ZIP 50401 Sector) | HIGH (64/100) | No Violation Identified (0 qtrs NC) | 🔒 $100,000+ Federal Fine • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • MASON CITY, IA (ZIP 50401 Sector) | HIGH (64/100) | Resolved / Historical Non-Compliance (1 qtrs NC) | 🔒 $10,000+ Federal Fine • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #4 | 🔒 Exact Street & Parcel Redacted • MASON CITY, IA (ZIP 50401 Sector) | HIGH (64/100) | Resolved / Historical Non-Compliance (1 qtrs NC) | 🔒 $10,000+ Federal Fine • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #5 | 🔒 Exact Street & Parcel Redacted • MASON CITY, IA (ZIP 50401 Sector) | HIGH (64/100) | Significant Violation (7 qtrs NC) | 🔒 7 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #6 | 🔒 Exact Street & Parcel Redacted • MASON CITY, IA (ZIP 50401 Sector) | MODERATE (52/100) | Violation Identified (4 qtrs NC) | 🔒 4 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #7 | 🔒 Exact Street & Parcel Redacted • MASON CITY, IA (ZIP 50401 Sector) | MODERATE (40/100) | Violation Identified (1 qtrs NC) | 🔒 1 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #8 | 🔒 Exact Street & Parcel Redacted • MASON CITY, IA (ZIP 50401 Sector) | MODERATE (33/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| CUSTOM AUTO BUILDERS INC FREE PREVIEW (LOW RISK) | 335 SOUTH DELAWARE AVENUE, MASON CITY, IA 50401 | LOW (19/100) | No Violation Identified (0 qtrs NC) | $0 |
| MASONITE CORPORATION FREE PREVIEW (LOW RISK) | 2510 19TH ST SW, MASON CITY, IA 50401 | LOW (19/100) | No Violation Identified (0 qtrs NC) | $0 |
| CROELL REDI-MIX INC FREE PREVIEW (LOW RISK) | 620 NORTH MASSACHUSETTS AVENUE, MASON CITY, IA 50401 | LOW (19/100) | No Violation Identified (0 qtrs NC) | $0 |
| MERCY MEDICAL CENTER-N IOWA EAST CAMPUS FREE PREVIEW (LOW RISK) | 1000 4TH ST SW, MASON CITY, IA 50401 | LOW (18/100) | No Violation Identified (0 qtrs NC) | $0 |
Frequently Asked Questions — ZIP 50401 (Mason 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 50401 (Mason City, IA)?
ZIP code 50401 (Mason City, IA) contains 206 EPA-tracked facilities, of which 7 (3.4%) are classified in the High-Risk tier, 5 (2.4%) have active compliance violations, and 144 (69.9%) handle RCRA hazardous waste.
How does ZIP 50401 compare to Cerro Gordo County and Iowa averages?
In ZIP 50401, 3.4% of regulated sites are rated High Risk, compared to 2.2% across Cerro Gordo County and 1.6% statewide in Iowa.
What is the EPA Radon Zone and ASTM Phase I screening radius for ZIP 50401?
Geologic screening places ZIP 50401 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 50401 (Mason City, IA) in a FEMA flood zone and what is the flood disaster history?
Cerro Gordo County has recorded 7 historical FEMA federal disaster declarations (6 flood, hurricane, or severe storm declarations). Run a street address scan in ZIP 50401 to unlock the exact parcel FEMA flood zone (AE / VE / X) and mandatory flood insurance status.
Does ZIP 50401 have expansive clay soil, foundation problems, or drinking water violations?
USDA regional soil screening for ZIP 50401 indicates a HIGH shrink-swell risk signal. Within ZIP 50401, federal registries track 8 SDWIS drinking water facilities, 6 Clean Water NPDES permits, and 4 impaired water body dischargers. Unlock a full property report for exact soil LEP %, water table depth, and utility violation dockets.