St. Charles County, Missouri — Property Hazard, Flood Zone, Soil, Water & EPA Guide
What Are the Flood, Soil Foundation & EPA Risks in St. Charles County, MO?
In St. Charles County, Missouri, public U.S. EPA records track 1,442 regulated facilities (#9 of 190 in Missouri), including 10 (0.7%) High-Risk sites and $32,787 in federal penalties. Countywide due diligence also covers 39 Safe Drinking Water (SDWIS) facilities, 1,578 Clean Water NPDES permits, 1 FEMA Federal Disaster Declarations (1 flood/storm), USDA Soil Foundation Shrink-Swell (MODERATE signal), and EPA Zone 1 — High Potential (> 4.0 pCi/L).
St. Charles County, MO 6-in-1 Flood, Soil Foundation, Tap Water & Radon Signals
🔒 Parcel-Level Soil LEP %, Water Table Depth & Flood Zone Require Street Address Scan📊 St. Charles County, MO Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 05, 2026)Municipalities in St. Charles County
ZIP Codes in St. Charles County
Top EPA Regulated Facilities in St. Charles County, MO
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 • SAINT CHARLES, MO (ZIP 63304 Sector) | HIGH (71/100) | Significant Violation (7 qtrs NC) | 🔒 7 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #2 | 🔒 Exact Street & Parcel Redacted • O'FALLON, MO (ZIP 63366 Sector) | HIGH (66/100) | Significant Violation (11 qtrs NC) | 🔒 11 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • NEW MELLE, MO (ZIP 63365 Sector) | HIGH (64/100) | Significant Violation (8 qtrs NC) | 🔒 8 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #4 | 🔒 Exact Street & Parcel Redacted • SAINT CHARLES, MO (ZIP 63301 Sector) | HIGH (64/100) | Significant Violation (7 qtrs NC) | 🔒 7 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #5 | 🔒 Exact Street & Parcel Redacted • ST CHARLES, MO (ZIP 63304 Sector) | HIGH (64/100) | Significant Violation (3 qtrs NC) | 🔒 3 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #6 | 🔒 Exact Street & Parcel Redacted • LAKE SAINT LOUIS, MO (ZIP 63367 Sector) | HIGH (64/100) | Significant Violation (2 qtrs NC) | 🔒 2 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #7 | 🔒 Exact Street & Parcel Redacted • WEST ALTON, MO (ZIP 63386 Sector) | MODERATE (52/100) | Violation Identified (4 qtrs NC) | 🔒 4 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #8 | 🔒 Exact Street & Parcel Redacted • WENTZVILLE, MO (ZIP 63385 Sector) | MODERATE (47/100) | Resolved / Historical Non-Compliance (2 qtrs NC) | 🔒 Federal Penalty on File • Unlock → |
| FRANCIS HOWELL HIGH SCHOOL - SOUTH FREE PREVIEW (LOW RISK) | 7055 HWY 94 SOUTH, ST. CHARLES, MO 63304 | LOW (20/100) | No Violation Identified (0 qtrs NC) | $0 |
| ROTADYNE ROLL GROUP FREE PREVIEW (LOW RISK) | 1500 PROGRESS W. LN., O'FALLON, MO 63366 | LOW (19/100) | No Violation Identified (0 qtrs NC) | $0 |
| LACLEDE MHP FREE PREVIEW (LOW RISK) | , O FALLON, MO 63366 | LOW (12/100) | Inactive (0 qtrs NC) | $0 |
| TA ST LOUIS WEST 175 FREE PREVIEW (LOW RISK) | , , MO | LOW (12/100) | Inactive (0 qtrs NC) | $0 |
Frequently Asked Questions — St. Charles County, Missouri Environmental Due Diligence
How many EPA-regulated environmental sites are in St. Charles County, Missouri?
Public U.S. EPA records track 1,442 regulated facilities in St. Charles County, Missouri (ranking #9 of 190 jurisdictions in MO). Of those, 10 (0.7%) are classified in the High-Risk tier due to significant enforcement or chemical release history, and 22 (1.5%) have active non-compliance quarters.
Which ZIP codes and cities in St. Charles County have the highest regulated facility density?
Within St. Charles County, the highest concentrations of EPA-tracked facilities are located in ZIP 63385 (Ofallon, 637 sites), ZIP 63366 (O'Fallon, 543 sites), ZIP 63301 (St Peters, 535 sites), spanning municipal corridors including Wentzville (630 sites), O'Fallon (366 sites), Ofallon (191 sites).
How many hazardous waste (RCRA) and toxic release (TRI) handlers operate in St. Charles County?
Across St. Charles County, 59 facilities (4.1% 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 St. Charles County, MO?
Geologic indoor air screening places St. Charles 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 St. Charles County, MO?
Federal records track 39 Safe Drinking Water (SDWIS) facilities, 1,578 Clean Water Act NPDES permits, and 167 impaired water dischargers in St. Charles County, alongside 1 historical FEMA federal disaster declarations (1 flood/storm events).
Does St. Charles County, MO have expansive clay soil or foundation risk?
USDA regional soil engineering screening for St. Charles 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.