ZIP 54650 (Onalaska, WI) — Flood Zone, Water Quality, Soil Foundation, Radon & EPA Hazards
ZIP code 54650 in Onalaska, Wisconsin (La Crosse County) has 143 EPA-tracked facilities, including 1 High-Risk sites (0.7%), 2 active violators, and $0 in federal penalties. Beyond industrial pollution, properties in ZIP 54650 are screened across 3 historical La Crosse County FEMA disasters, USDA Soil Foundation Shrink-Swell (LOW signal), Tap Water & Watershed Permits (48), and EPA Zone 2 — Moderate Potential (2.0 – 4.0 pCi/L).
ZIP 54650 (Onalaska, WI) 6-in-1 Flood, Soil Foundation, Tap Water & Radon Signals
🔒 Parcel-Level Soil LEP %, Water Table Depth & Flood Zone Require Street Address Scan📊 ZIP 54650 (Onalaska, WI) Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 01, 2026)ZIP 54650 Sector Screening Map (High-Risk Pin Coordinates Locked)
Exact street pins for 1 High-Risk and 2 Active Violation sites are redacted on public directory maps.
Regulated EPA Facilities in ZIP 54650 (Onalaska, WI)
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 • ONALASKA, WI (ZIP 54650 Sector) | HIGH (66/100) | Significant Violation (6 qtrs NC) | 🔒 6 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #2 | 🔒 Exact Street & Parcel Redacted • ONALASKA, WI (ZIP 54650 Sector) | MODERATE (40/100) | Violation Identified (12 qtrs NC) | 🔒 12 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • ONALASKA, WI (ZIP 54650 Sector) | MODERATE (35/100) | Resolved / Historical Non-Compliance (2 qtrs NC) | 🔒 2 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #4 | 🔒 Exact Street & Parcel Redacted • ONALASKA, WI (ZIP 54650 Sector) | MODERATE (30/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #5 | 🔒 Exact Street & Parcel Redacted • ONALASKA, WI (ZIP 54650 Sector) | MODERATE (30/100) | Resolved / Historical Non-Compliance (2 qtrs NC) | 🔒 2 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #6 | 🔒 Exact Street & Parcel Redacted • ONALASKA, WI (ZIP 54650 Sector) | MODERATE (30/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #7 | 🔒 Exact Street & Parcel Redacted • ONALASKA, WI (ZIP 54650 Sector) | MODERATE (30/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #8 | 🔒 Exact Street & Parcel Redacted • ONALASKA, WI (ZIP 54650 Sector) | MODERATE (30/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| AMERICAN ASPHALT PLANT #83 FREE PREVIEW (LOW RISK) | PORTABLE, ONALASKA, WI 54650 | LOW (25/100) | No Violation Identified (0 qtrs NC) | $0 |
| TJ MAXX T0692 FREE PREVIEW (LOW RISK) | 9366 STATE ROAD 16 STE 400, ONALASKA, WI 54650 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| AUTOZONE #4363 FREE PREVIEW (LOW RISK) | 100 THEATER RD, ONALASKA, WI 54650 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| MICHAELS STORE #9514 FREE PREVIEW (LOW RISK) | 9386 STATE RD 16, ONALASKA, WI 54650 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
Frequently Asked Questions — ZIP 54650 (Onalaska, WI) EPA Dataset & Radon
DATASET: U.S. EPA ECHO • FRS • RCRAInfo • TRI (November 01, 2026)How many EPA-tracked environmental sites are in ZIP code 54650 (Onalaska, WI)?
ZIP code 54650 (Onalaska, WI) contains 143 EPA-tracked facilities, of which 1 (0.7%) are classified in the High-Risk tier, 2 (1.4%) have active compliance violations, and 87 (60.8%) handle RCRA hazardous waste.
How does ZIP 54650 compare to La Crosse County and Wisconsin averages?
In ZIP 54650, 0.7% of regulated sites are rated High Risk, compared to 1.0% across La Crosse County and 0.6% statewide in Wisconsin.
What is the EPA Radon Zone and ASTM Phase I screening radius for ZIP 54650?
Geologic screening places ZIP 54650 in EPA Zone 2 — Moderate Potential (2.0 – 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 54650 (Onalaska, WI) in a FEMA flood zone and what is the flood disaster history?
La Crosse County has recorded 3 historical FEMA federal disaster declarations (3 flood, hurricane, or severe storm declarations). Run a street address scan in ZIP 54650 to unlock the exact parcel FEMA flood zone (AE / VE / X) and mandatory flood insurance status.
Does ZIP 54650 have expansive clay soil, foundation problems, or drinking water violations?
USDA regional soil screening for ZIP 54650 indicates a LOW shrink-swell risk signal. Within ZIP 54650, federal registries track 5 SDWIS drinking water facilities, 43 Clean Water NPDES permits, and 22 impaired water body dischargers. Unlock a full property report for exact soil LEP %, water table depth, and utility violation dockets.