Mason County, Illinois — Flood Zone, Water Quality, Soil Foundation, Radon & EPA Hazards
In Mason County, Illinois, public U.S. EPA records track 206 regulated facilities (#66 of 193 in Illinois), including 1 (0.5%) High-Risk sites and $0 in federal penalties. Countywide due diligence also covers 37 Safe Drinking Water (SDWIS) facilities, 26 Clean Water NPDES permits, 5 FEMA Federal Disaster Declarations (5 flood/storm), USDA Soil Foundation Shrink-Swell (LOW signal), and EPA Zone 1 — High Potential (> 4.0 pCi/L).
Mason County, IL 6-in-1 Flood, Soil Foundation, Tap Water & Radon Signals
🔒 Parcel-Level Soil LEP %, Water Table Depth & Flood Zone Require Street Address Scan📊 Mason County, IL Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 01, 2026)Municipalities in Mason County
Top EPA Regulated Facilities in Mason County, IL
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 High-Risk EPA Enforcement Record #1 | 🔒 Exact Street & Parcel Redacted • , IL (ZIP Sector) | HIGH (64/100) | Significant Violation (10 qtrs NC) | 🔒 10 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #2 | 🔒 Exact Street & Parcel Redacted • HAVANA, IL (ZIP 62644 Sector) | MODERATE (44/100) | Violation Identified (12 qtrs NC) | 🔒 12 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • BATH, IL (ZIP 62617 Sector) | MODERATE (43/100) | Violation (12 qtrs NC) | 🔒 12 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #4 | 🔒 Exact Street & Parcel Redacted • MASON CITY, IL (ZIP 62664 Sector) | MODERATE (40/100) | Violation Identified (12 qtrs NC) | 🔒 12 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #5 | 🔒 Exact Street & Parcel Redacted • , IL (ZIP Sector) | MODERATE (36/100) | Violation Identified (11 qtrs NC) | 🔒 11 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #6 | 🔒 Exact Street & Parcel Redacted • MASON CITY, IL (ZIP 62664 Sector) | MODERATE (35/100) | Violation Identified (9 qtrs NC) | 🔒 9 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #7 | 🔒 Exact Street & Parcel Redacted • , IL (ZIP Sector) | MODERATE (35/100) | Violation Identified (11 qtrs NC) | 🔒 11 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #8 | 🔒 Exact Street & Parcel Redacted • MANITO, IL (ZIP 61546 Sector) | MODERATE (34/100) | Violation Identified (7 qtrs NC) | 🔒 7 Qtrs Non-Compliance • Unlock → |
| INTERMET HAVANA FOUNDRY FREE PREVIEW (LOW RISK) | 227 WAGNER AVENUE, HAVANA, IL 62644 | LOW (20/100) | No Violation Identified (0 qtrs NC) | $0 |
| MAINSTREET AUTOBODY FREE PREVIEW (LOW RISK) | 715 S MAIN, MASON CITY, IL 62664 | LOW (19/100) | No Violation Identified (0 qtrs NC) | $0 |
| BEST AUTOMOTIVE INC FREE PREVIEW (LOW RISK) | 217 E CHESTNUT, MASON CITY, IL 62664 | LOW (19/100) | No Violation Identified (0 qtrs NC) | $0 |
| WARECO SERVICE INC FREE PREVIEW (LOW RISK) | 320 PROMENADE, HAVANA, IL 62644 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
Frequently Asked Questions — Mason County, Illinois Environmental Due Diligence
How many EPA-regulated environmental sites are in Mason County, Illinois?
Public U.S. EPA records track 206 regulated facilities in Mason County, Illinois (ranking #66 of 193 jurisdictions in IL). Of those, 1 (0.5%) are classified in the High-Risk tier due to significant enforcement or chemical release history, and 12 (5.8%) have active non-compliance quarters.
Which ZIP codes and cities in Mason County have the highest regulated facility density?
Within Mason County, the highest concentrations of EPA-tracked facilities are located in ZIP 62644 (Havana, 80 sites), ZIP 62664 (Mason City, 43 sites), ZIP 61546 (Manito, 28 sites), spanning municipal corridors including Havana (80 sites), Mason City (41 sites), Manito (28 sites).
How many hazardous waste (RCRA) and toxic release (TRI) handlers operate in Mason County?
Across Mason County, 80 facilities (38.8% 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 Mason County, IL?
Geologic indoor air screening places Mason 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 Mason County, IL?
Federal records track 37 Safe Drinking Water (SDWIS) facilities, 26 Clean Water Act NPDES permits, and 7 impaired water dischargers in Mason County, alongside 5 historical FEMA federal disaster declarations (5 flood/storm events).
Does Mason County, IL have expansive clay soil or foundation risk?
USDA regional soil engineering screening for Mason County indicates a LOW shrink-swell risk signal and steel pipe corrosivity rated Low. Run a street address scan to unlock the exact parcel soil series, LEP %, and water table depth.