Winnebago County, Wisconsin — Property Hazard, Flood Zone, Soil, Water & EPA Guide
What Are the Flood, Soil Foundation & EPA Risks in Winnebago County, WI?
In Winnebago County, Wisconsin, public U.S. EPA records track 1,169 regulated facilities (#8 of 94 in Wisconsin), including 10 (0.9%) High-Risk sites and $5,470,122 in federal penalties. Countywide due diligence also covers 155 Safe Drinking Water (SDWIS) facilities, 233 Clean Water NPDES permits, 2 FEMA Federal Disaster Declarations (2 flood/storm), USDA Soil Foundation Shrink-Swell (HIGH signal), and EPA Zone 2 — Moderate Potential (2.0 – 4.0 pCi/L).
Winnebago County, WI 6-in-1 Flood, Soil Foundation, Tap Water & Radon Signals
🔒 Parcel-Level Soil LEP %, Water Table Depth & Flood Zone Require Street Address Scan📊 Winnebago County, WI Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 05, 2026)Municipalities in Winnebago County
ZIP Codes in Winnebago County
Top EPA Regulated Facilities in Winnebago County, 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 Tier & Score | Compliance Status | Enforcement / Unlock |
|---|---|---|---|---|
| 🔒 Locked High-Risk EPA Enforcement Record #1 | 🔒 Exact Street & Parcel Redacted • NEENAH, WI (ZIP 54956 Sector) | HIGH (75/100) | Significant Violation (12 qtrs NC) | 🔒 12 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #2 | 🔒 Exact Street & Parcel Redacted • OSHKOSH, WI (ZIP 54902 Sector) | HIGH (67/100) | Significant Violation (12 qtrs NC) | 🔒 12 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • NEENAH, WI (ZIP 54956 Sector) | HIGH (65/100) | Significant Violation (12 qtrs NC) | 🔒 12 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #4 | 🔒 Exact Street & Parcel Redacted • OSHKOSH, WI (ZIP 54901 Sector) | HIGH (64/100) | Significant Violation (3 qtrs NC) | 🔒 3 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #5 | 🔒 Exact Street & Parcel Redacted • OSHKOSH, WI (ZIP 54901 Sector) | MODERATE (57/100) | Resolved / Historical Non-Compliance (6 qtrs NC) | 🔒 $10,000+ Federal Fine • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #6 | 🔒 Exact Street & Parcel Redacted • APPLETON, WI (ZIP 54914 Sector) | MODERATE (52/100) | Violation Identified (4 qtrs NC) | 🔒 4 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #7 | 🔒 Exact Street & Parcel Redacted • APPLETON, WI (ZIP 54914 Sector) | MODERATE (51/100) | Violation Identified (4 qtrs NC) | 🔒 4 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #8 | 🔒 Exact Street & Parcel Redacted • NEENAH, WI (ZIP 54956 Sector) | MODERATE (48/100) | Violation Identified (8 qtrs NC) | 🔒 8 Qtrs Non-Compliance • Unlock → |
| KIMBERLY CLARK NEENAH PAPER FC FREE PREVIEW (LOW RISK) | 1500 KIMBERLY DR, NEENAH, WI 54957 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| OMRO SCHOOL DIST FREE PREVIEW (LOW RISK) | 455 LEACH ST, OMRO, WI 54963 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| EDS REPAIR FREE PREVIEW (LOW RISK) | RTE 1 HWY 63, CLAYTON, WI 54004 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| ROUNDY'S 187 FREE PREVIEW (LOW RISK) | 511 W CALUMET ST, APPLETON, WI 54915 | LOW (16/100) | No Violation Identified (0 qtrs NC) | $0 |
Frequently Asked Questions — Winnebago County, Wisconsin Environmental Due Diligence
How many EPA-regulated environmental sites are in Winnebago County, Wisconsin?
Public U.S. EPA records track 1,169 regulated facilities in Winnebago County, Wisconsin (ranking #8 of 94 jurisdictions in WI). Of those, 10 (0.9%) are classified in the High-Risk tier due to significant enforcement or chemical release history, and 34 (2.9%) have active non-compliance quarters.
Which ZIP codes and cities in Winnebago County have the highest regulated facility density?
Within Winnebago County, the highest concentrations of EPA-tracked facilities are located in ZIP 54956 (Neenah, 297 sites), ZIP 54901 (Oshkosh, 228 sites), ZIP 54915 (Appleton, 147 sites), spanning municipal corridors including Appleton (635 sites), Oshkosh (461 sites), Neenah (290 sites).
How many hazardous waste (RCRA) and toxic release (TRI) handlers operate in Winnebago County?
Across Winnebago County, 789 facilities (67.5% 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 Winnebago County, WI?
Geologic indoor air screening places Winnebago County in EPA Zone 2 — Moderate Potential (2.0 – 4.0 pCi/L). Counties in EPA Radon Zone 2 have a predicted average indoor radon level between 2.0 and 4.0 pCi/L. Testing basement or ground-floor living areas is recommended during home inspection.
How many drinking water systems (SDWIS), impaired water bodies, and FEMA flood disasters are recorded in Winnebago County, WI?
Federal records track 155 Safe Drinking Water (SDWIS) facilities, 233 Clean Water Act NPDES permits, and 49 impaired water dischargers in Winnebago County, alongside 2 historical FEMA federal disaster declarations (2 flood/storm events).
Does Winnebago County, WI have expansive clay soil or foundation risk?
USDA regional soil engineering screening for Winnebago County indicates a HIGH 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.