ZIP 63385 (Ofallon, MO) — Flood Zone, Water Quality, Soil Foundation, Radon & EPA Hazards
ZIP code 63385 in Ofallon, Missouri (St. Charles County) has 637 EPA-tracked facilities, including 3 High-Risk sites (0.5%), 5 active violators, and $14,427 in federal penalties. Beyond industrial pollution, properties in ZIP 63385 are screened across 1 historical St. Charles County FEMA disasters, USDA Soil Foundation Shrink-Swell (MODERATE signal), Tap Water & Watershed Permits (525), and EPA Zone 1 — High Potential (> 4.0 pCi/L).
ZIP 63385 (Ofallon, MO) 6-in-1 Flood, Soil Foundation, Tap Water & Radon Signals
🔒 Parcel-Level Soil LEP %, Water Table Depth & Flood Zone Require Street Address Scan📊 ZIP 63385 (Ofallon, MO) Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 01, 2026)ZIP 63385 Sector Screening Map (High-Risk Pin Coordinates Locked)
Exact street pins for 3 High-Risk and 5 Active Violation sites are redacted on public directory maps.
Regulated EPA Facilities in ZIP 63385 (Ofallon, 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 Score (0–100) | Compliance Status | Enforcement / Unlock |
|---|---|---|---|---|
| 🔒 Locked Regulated EPA Enforcement Record #1 | 🔒 Exact Street & Parcel Redacted • WENTZVILLE, MO (ZIP 63385 Sector) | MODERATE (47/100) | Resolved / Historical Non-Compliance (2 qtrs NC) | 🔒 Federal Penalty on File • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #2 | 🔒 Exact Street & Parcel Redacted • WENTZVILLE, MO (ZIP 63385 Sector) | MODERATE (46/100) | Resolved / Historical Non-Compliance (1 qtrs NC) | 🔒 Federal Penalty on File • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • WENTZVILLE, MO (ZIP 63385 Sector) | MODERATE (43/100) | Violation Identified (10 qtrs NC) | 🔒 10 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #4 | 🔒 Exact Street & Parcel Redacted • WENTZVILLE, MO (ZIP 63385 Sector) | MODERATE (39/100) | Violation Identified (11 qtrs NC) | 🔒 11 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #5 | 🔒 Exact Street & Parcel Redacted • WENTZVILLE, MO (ZIP 63385 Sector) | MODERATE (38/100) | Violation Identified (6 qtrs NC) | 🔒 6 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #6 | 🔒 Exact Street & Parcel Redacted • WENTZVILLE, MO (ZIP 63385 Sector) | MODERATE (34/100) | Violation Identified (7 qtrs NC) | 🔒 7 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #7 | 🔒 Exact Street & Parcel Redacted • WENTZVILLE, MO (ZIP 63385 Sector) | MODERATE (34/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #8 | 🔒 Exact Street & Parcel Redacted • WENTZVILLE, MO (ZIP 63385 Sector) | MODERATE (34/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| WENTZVILLE CITY OF FREE PREVIEW (LOW RISK) | 200 EAST 4TH STREET, WENTZVILLE, MO 63385 | LOW (20/100) | No Violation Identified (0 qtrs NC) | $0 |
| GROUND EFFECTS FREE PREVIEW (LOW RISK) | 320 SHOCKDRAKE CT, WENTZVILLE, MO 63385 | LOW (20/100) | No Violation Identified (0 qtrs NC) | $0 |
| R.K. STRATMAN FREE PREVIEW (LOW RISK) | 680-B PARR RD, WENTZVILLE, MO 63385 | LOW (19/100) | No Violation Identified (0 qtrs NC) | $0 |
| ST CHARLES CO HIGHWAY DEPT FREE PREVIEW (LOW RISK) | 121 FREYMUTH RD, WENTZVILLE, MO 63385 | LOW (18/100) | No Violation Identified (0 qtrs NC) | $0 |
Frequently Asked Questions — ZIP 63385 (Ofallon, MO) EPA Dataset & Radon
DATASET: U.S. EPA ECHO • FRS • RCRAInfo • TRI (November 01, 2026)How many EPA-tracked environmental sites are in ZIP code 63385 (Ofallon, MO)?
ZIP code 63385 (Ofallon, MO) contains 637 EPA-tracked facilities, of which 3 (0.5%) are classified in the High-Risk tier, 5 (0.8%) have active compliance violations, and 103 (16.2%) handle RCRA hazardous waste.
How does ZIP 63385 compare to St. Charles County and Missouri averages?
In ZIP 63385, 0.5% of regulated sites are rated High Risk, compared to 0.7% across St. Charles County and 1.5% statewide in Missouri.
What is the EPA Radon Zone and ASTM Phase I screening radius for ZIP 63385?
Geologic screening places ZIP 63385 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 63385 (Ofallon, MO) in a FEMA flood zone and what is the flood disaster history?
St. Charles County has recorded 1 historical FEMA federal disaster declarations (1 flood, hurricane, or severe storm declarations). Run a street address scan in ZIP 63385 to unlock the exact parcel FEMA flood zone (AE / VE / X) and mandatory flood insurance status.
Does ZIP 63385 have expansive clay soil, foundation problems, or drinking water violations?
USDA regional soil screening for ZIP 63385 indicates a MODERATE shrink-swell risk signal. Within ZIP 63385, federal registries track 2 SDWIS drinking water facilities, 523 Clean Water NPDES permits, and 94 impaired water body dischargers. Unlock a full property report for exact soil LEP %, water table depth, and utility violation dockets.