Williamson County, Arizona — Property Hazard, Flood Zone, Soil, Water & EPA Guide
What Are the Flood, Soil Foundation & EPA Risks in Williamson County, AZ?
In Williamson County, Arizona, public U.S. EPA records track 2 regulated facilities (#70 of 70 in Arizona), including 0 (0.0%) High-Risk sites and $0 in federal penalties. Countywide due diligence also covers 0 Safe Drinking Water (SDWIS) facilities, 2 Clean Water NPDES permits, 22 FEMA Federal Disaster Declarations (6 flood/storm), USDA Soil Foundation Shrink-Swell (LOW signal), and EPA Zone 3 — Low Potential (< 2.0 pCi/L).
Williamson County, AZ 6-in-1 Flood, Soil Foundation, Tap Water & Radon Signals
🔒 Parcel-Level Soil LEP %, Water Table Depth & Flood Zone Require Street Address Scan📊 Williamson County, AZ Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 03, 2026)Municipalities in Williamson County
ZIP Codes in Williamson County
Top EPA Regulated Facilities in Williamson County, AZ
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 |
|---|---|---|---|---|
| FORT HUACHUCA JITC ELECTRONIC LAB FREE PREVIEW (LOW RISK) | NO ADDRESS ON FILE, UNKNOWN, AZ 85253 | LOW (11/100) | No Violation Identified (0 qtrs NC) | $0 |
| THE LEARNING EXPERIENCE FREE PREVIEW (LOW RISK) | NO ADDRESS ON FILE, UNKNOWN, AZ 78633 | LOW (10/100) | No Violation Identified (0 qtrs NC) | $0 |
Frequently Asked Questions — Williamson County, Arizona Environmental Due Diligence
How many EPA-regulated environmental sites are in Williamson County County, Arizona?
Public U.S. EPA records track 2 regulated facilities in Williamson County County, Arizona (ranking #70 of 70 jurisdictions in AZ). Of those, 0 (0.0%) are classified in the High-Risk tier due to significant enforcement or chemical release history, and 0 (0.0%) have active non-compliance quarters.
Which ZIP codes and cities in Williamson County County have the highest regulated facility density?
Within Williamson County County, the highest concentrations of EPA-tracked facilities are located in local postal sectors, spanning municipal corridors including Williamson County.
How many hazardous waste (RCRA) and toxic release (TRI) handlers operate in Williamson County County?
Across Williamson County County, 0 facilities (0.0% 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 Williamson County County, AZ?
Geologic indoor air screening places Williamson County County in EPA Zone 3 — Low Potential (< 2.0 pCi/L). Counties in EPA Radon Zone 3 have a predicted average indoor radon level below 2.0 pCi/L, indicating lower regional geologic radon risk.
How many drinking water systems (SDWIS), impaired water bodies, and FEMA flood disasters are recorded in Williamson County County, AZ?
Federal records track 0 Safe Drinking Water (SDWIS) facilities, 2 Clean Water Act NPDES permits, and 0 impaired water dischargers in Williamson County County, alongside 22 historical FEMA federal disaster declarations (6 flood/storm events).
Does Williamson County, AZ have expansive clay soil or foundation risk?
USDA regional soil engineering screening for Williamson County indicates a LOW shrink-swell risk signal and steel pipe corrosivity rated Moderate. Run a street address scan to unlock the exact parcel soil series, LEP %, and water table depth.