Williamson County, Illinois — Property Hazard, Flood Zone, Soil, Water & EPA Guide
What Are the Flood, Soil Foundation & EPA Risks in Williamson County, IL?
In Williamson County, Illinois, public U.S. EPA records track 379 regulated facilities (#38 of 193 in Illinois), including 12 (3.2%) High-Risk sites and $5,300,000 in federal penalties. Countywide due diligence also covers 29 Safe Drinking Water (SDWIS) facilities, 89 Clean Water NPDES permits, 5 FEMA Federal Disaster Declarations (5 flood/storm), USDA Soil Foundation Shrink-Swell (MODERATE signal), and EPA Zone 1 — High Potential (> 4.0 pCi/L).
Williamson 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📊 Williamson County, IL Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 05, 2026)Municipalities in Williamson County
Top EPA Regulated Facilities in Williamson 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 • MARION, IL (ZIP 62959 Sector) | HIGH (66/100) | Significant Violation (12 qtrs NC) | 🔒 12 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #2 | 🔒 Exact Street & Parcel Redacted • MARION, IL (ZIP 62959 Sector) | HIGH (65/100) | Violation Identified (12 qtrs NC) | 🔒 12 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • JOHNSTON CITY, IL (ZIP 62951 Sector) | HIGH (64/100) | Significant Violation (11 qtrs NC) | 🔒 11 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #4 | 🔒 Exact Street & Parcel Redacted • MARION, IL (ZIP 62959 Sector) | HIGH (64/100) | Significant Violation (10 qtrs NC) | 🔒 10 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #5 | 🔒 Exact Street & Parcel Redacted • MARION, IL (ZIP 62959 Sector) | HIGH (64/100) | Significant Violation (12 qtrs NC) | 🔒 12 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #6 | 🔒 Exact Street & Parcel Redacted • STONEFORT, IL (ZIP 62987 Sector) | HIGH (64/100) | Significant Violation (8 qtrs NC) | 🔒 8 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #7 | 🔒 Exact Street & Parcel Redacted • JOHNSTON CITY, IL (ZIP 62951 Sector) | HIGH (64/100) | Significant Violation (7 qtrs NC) | 🔒 7 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #8 | 🔒 Exact Street & Parcel Redacted • MARION, IL (ZIP 62959 Sector) | MODERATE (57/100) | Violation Identified (8 qtrs NC) | 🔒 8 Qtrs Non-Compliance • Unlock → |
| VALVOLINE INSTANT OIL CHANGE FREE PREVIEW (LOW RISK) | 1126 N CARBON ST, MARION, IL 62959 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| MAXYMILLIAN JH INCORPORATED FREE PREVIEW (LOW RISK) | OGDEN ROAD B, HERRIN, IL 62948 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| MIDWEST WOODWORKING & FIXTURE FREE PREVIEW (LOW RISK) | RTE 148 S AND OGDEN RD, CARTERVILLE, IL 62918 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| TANNERS AUTO BODY LLC FREE PREVIEW (LOW RISK) | 1309 CORNELL AVE, MARION, IL 62959 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
Frequently Asked Questions — Williamson County, Illinois Environmental Due Diligence
How many EPA-regulated environmental sites are in Williamson County, Illinois?
Public U.S. EPA records track 379 regulated facilities in Williamson County, Illinois (ranking #38 of 193 jurisdictions in IL). Of those, 12 (3.2%) are classified in the High-Risk tier due to significant enforcement or chemical release history, and 31 (8.2%) have active non-compliance quarters.
Which ZIP codes and cities in Williamson County have the highest regulated facility density?
Within Williamson County, the highest concentrations of EPA-tracked facilities are located in ZIP 62959 (Marion, 237 sites), ZIP 62918 (Carterville, 57 sites), ZIP 62951 (Johnston City, 27 sites), spanning municipal corridors including Marion (239 sites), Carterville (55 sites), Johnston City (28 sites).
How many hazardous waste (RCRA) and toxic release (TRI) handlers operate in Williamson County?
Across Williamson County, 199 facilities (52.5% 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 Williamson County, IL?
Geologic indoor air screening places Williamson 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 Williamson County, IL?
Federal records track 29 Safe Drinking Water (SDWIS) facilities, 89 Clean Water Act NPDES permits, and 10 impaired water dischargers in Williamson County, alongside 5 historical FEMA federal disaster declarations (5 flood/storm events).
Does Williamson County, IL have expansive clay soil or foundation risk?
USDA regional soil engineering screening for Williamson County indicates a MODERATE shrink-swell risk signal and steel pipe corrosivity rated High. Run a street address scan to unlock the exact parcel soil series, LEP %, and water table depth.