Hamilton County, Iowa — Property Hazard, Flood Zone, Soil, Water & EPA Guide
What Are the Flood, Soil Foundation & EPA Risks in Hamilton County, IA?
In Hamilton County, Iowa, public U.S. EPA records track 166 regulated facilities (#26 of 117 in Iowa), including 3 (1.8%) High-Risk sites and $217,129 in federal penalties. Countywide due diligence also covers 19 Safe Drinking Water (SDWIS) facilities, 17 Clean Water NPDES permits, 2 FEMA Federal Disaster Declarations (2 flood/storm), USDA Soil Foundation Shrink-Swell (HIGH signal), and EPA Zone 1 — High Potential (> 4.0 pCi/L).
Hamilton County, IA 6-in-1 Flood, Soil Foundation, Tap Water & Radon Signals
🔒 Parcel-Level Soil LEP %, Water Table Depth & Flood Zone Require Street Address Scan📊 Hamilton County, IA Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 03, 2026)Municipalities in Hamilton County
Top EPA Regulated Facilities in Hamilton County, IA
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 • WEBSTER CITY, IA (ZIP 50595 Sector) | HIGH (64/100) | Significant Violation (12 qtrs NC) | 🔒 12 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #2 | 🔒 Exact Street & Parcel Redacted • WEBSTER CITY, IA (ZIP 50595 Sector) | MODERATE (61/100) | Resolved / Historical Non-Compliance (7 qtrs NC) | 🔒 $100,000+ Federal Fine • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • JEWELL, IA (ZIP 50130 Sector) | MODERATE (51/100) | Violation Identified (4 qtrs NC) | 🔒 4 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #4 | 🔒 Exact Street & Parcel Redacted • WEBSTER CITY, IA (ZIP 50595 Sector) | MODERATE (34/100) | Violation Identified (7 qtrs NC) | 🔒 7 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #5 | 🔒 Exact Street & Parcel Redacted • WILLIAMS, IA (ZIP 50271 Sector) | MODERATE (32/100) | Resolved / Historical Non-Compliance (3 qtrs NC) | 🔒 3 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #6 | 🔒 Exact Street & Parcel Redacted • ELLSWORTH, IA (ZIP 50075 Sector) | MODERATE (31/100) | Violation Identified (4 qtrs NC) | 🔒 4 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #7 | 🔒 Exact Street & Parcel Redacted • WEBSTER CITY, IA (ZIP 50595 Sector) | MODERATE (30/100) | No Violation Identified (0 qtrs NC) | 🔒 Federal Penalty on File • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #8 | 🔒 Exact Street & Parcel Redacted • JEWELL, IA (ZIP 50130 Sector) | MODERATE (30/100) | Resolved / Historical Non-Compliance (8 qtrs NC) | 🔒 8 Qtrs Non-Compliance • Unlock → |
| MERTZ ENGINEERING CO. FREE PREVIEW (LOW RISK) | 1811 W 2ND ST, WEBSTER CITY, IA 50595 | LOW (20/100) | No Violation Identified (0 qtrs NC) | $0 |
| HANDI-KLASP CORP FREE PREVIEW (LOW RISK) | 1519 JAMES STREET, WEBSTER CITY, IA 50595 | LOW (20/100) | No Violation Identified (0 qtrs NC) | $0 |
| SENECA FOUNDRY INC FREE PREVIEW (LOW RISK) | 240 MACKINLAY KANTOR DRIVE, WEBSTER CITY, IA 50595 | LOW (19/100) | No Violation Identified (0 qtrs NC) | $0 |
| VIC'S AUTO BODY FREE PREVIEW (LOW RISK) | 901 2ND ST, WEBSTER, IA 50595 | LOW (19/100) | No Violation Identified (0 qtrs NC) | $0 |
Frequently Asked Questions — Hamilton County, Iowa Environmental Due Diligence
How many EPA-regulated environmental sites are in Hamilton County, Iowa?
Public U.S. EPA records track 166 regulated facilities in Hamilton County, Iowa (ranking #26 of 117 jurisdictions in IA). Of those, 3 (1.8%) are classified in the High-Risk tier due to significant enforcement or chemical release history, and 9 (5.4%) have active non-compliance quarters.
Which ZIP codes and cities in Hamilton County have the highest regulated facility density?
Within Hamilton County, the highest concentrations of EPA-tracked facilities are located in ZIP 50595 (Webster City, 77 sites), ZIP 50271 (Williams, 20 sites), ZIP 50075 (Ellsworth, 12 sites), spanning municipal corridors including Webster City (73 sites), Williams (22 sites), Jewell (16 sites).
How many hazardous waste (RCRA) and toxic release (TRI) handlers operate in Hamilton County?
Across Hamilton County, 76 facilities (45.8% 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 Hamilton County, IA?
Geologic indoor air screening places Hamilton 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 Hamilton County, IA?
Federal records track 19 Safe Drinking Water (SDWIS) facilities, 17 Clean Water Act NPDES permits, and 1 impaired water dischargers in Hamilton County, alongside 2 historical FEMA federal disaster declarations (2 flood/storm events).
Does Hamilton County, IA have expansive clay soil or foundation risk?
USDA regional soil engineering screening for Hamilton 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.