Maricopa County, Arizona — Property Hazard, Flood Zone, Soil, Water & EPA Guide
What Are the Flood, Soil Foundation & EPA Risks in Maricopa County, AZ?
In Maricopa County, Arizona, public U.S. EPA records track 8,741 regulated facilities (#1 of 36 in Arizona), including 52 (0.6%) High-Risk sites and $28,484,656 in federal penalties. Countywide due diligence also covers 292 Safe Drinking Water (SDWIS) facilities, 3,365 Clean Water NPDES permits, 3 FEMA Federal Disaster Declarations (0 flood/storm), USDA Soil Foundation Shrink-Swell (MODERATE signal), and EPA Zone 2 — Moderate Potential (2.0 – 4.0 pCi/L).
Maricopa 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📊 Maricopa County, AZ Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 05, 2026)Municipalities in Maricopa County
ZIP Codes in Maricopa County
Top EPA Regulated Facilities in Maricopa 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 |
|---|---|---|---|---|
| 🔒 Locked High-Risk EPA Enforcement Record #1 | 🔒 Exact Street & Parcel Redacted • BUCKEYE, AZ (ZIP 85326 Sector) | HIGH (73/100) | Significant Violation (11 qtrs NC) | 🔒 11 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #2 | 🔒 Exact Street & Parcel Redacted • PHOENIX, AZ (ZIP 85019 Sector) | HIGH (70/100) | Violation Identified (2 qtrs NC) | 🔒 $100,000+ Federal Fine • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • MESA, AZ (ZIP 85212 Sector) | HIGH (70/100) | Violation (5 qtrs NC) | 🔒 Federal Penalty on File • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #4 | 🔒 Exact Street & Parcel Redacted • PHOENIX, AZ (ZIP 85041 Sector) | HIGH (70/100) | Significant Violation (12 qtrs NC) | 🔒 12 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #5 | 🔒 Exact Street & Parcel Redacted • PHOENIX, AZ (ZIP 85043 Sector) | HIGH (69/100) | Violation Identified (4 qtrs NC) | 🔒 $10,000+ Federal Fine • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #6 | 🔒 Exact Street & Parcel Redacted • PHOENIX, AZ (ZIP 85009 Sector) | HIGH (69/100) | Significant Violation (3 qtrs NC) | 🔒 3 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #7 | 🔒 Exact Street & Parcel Redacted • PHOENIX, AZ (ZIP 85009 Sector) | HIGH (66/100) | Significant Violation (12 qtrs NC) | 🔒 12 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #8 | 🔒 Exact Street & Parcel Redacted • PHOENIX, AZ (ZIP 85040 Sector) | HIGH (65/100) | Significant Violation (12 qtrs NC) | 🔒 12 Qtrs Non-Compliance • Unlock → |
| INCIDENT SALT RIVER PROJECT-MCDOWELL & 3 FREE PREVIEW (LOW RISK) | 32ND ST & MCDOWELL RD , ON, PHOENIX, AZ 85008 | LOW (16/100) | No Violation Identified (0 qtrs NC) | $0 |
| WALMART SUPERCENTER #1646 FREE PREVIEW (LOW RISK) | 6131 E SOUTHERN AVE, MESA, AZ 85206 | LOW (16/100) | No Violation Identified (0 qtrs NC) | $0 |
| HENDRIX JUNIOR HIGH SCHOOL FREE PREVIEW (LOW RISK) | 1550 W SUMMIT PL, CHANDLER, AZ 85224 | LOW (15/100) | No Violation Identified (0 qtrs NC) | $0 |
| FRY'S #607-660 FREE PREVIEW (LOW RISK) | 5100 S MCCLINTOCK DR, TEMPE, AZ 85282 | LOW (15/100) | No Violation Identified (0 qtrs NC) | $0 |
Frequently Asked Questions — Maricopa County, Arizona Environmental Due Diligence
How many EPA-regulated environmental sites are in Maricopa County, Arizona?
Public U.S. EPA records track 8,741 regulated facilities in Maricopa County, Arizona (ranking #1 of 36 jurisdictions in AZ). Of those, 52 (0.6%) are classified in the High-Risk tier due to significant enforcement or chemical release history, and 117 (1.3%) have active non-compliance quarters.
Which ZIP codes and cities in Maricopa County have the highest regulated facility density?
Within Maricopa County, the highest concentrations of EPA-tracked facilities are located in ZIP 85009 (Phoenix, 522 sites), ZIP 85034 (Phoenix, 504 sites), ZIP 85040 (Phoenix, 432 sites), spanning municipal corridors including Phoenix (4,672 sites), Mesa (1,133 sites), Tempe (895 sites).
How many hazardous waste (RCRA) and toxic release (TRI) handlers operate in Maricopa County?
Across Maricopa County, 7,688 facilities (88.0% 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 Maricopa County, AZ?
Geologic indoor air screening places Maricopa 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 Maricopa County, AZ?
Federal records track 292 Safe Drinking Water (SDWIS) facilities, 3,365 Clean Water Act NPDES permits, and 97 impaired water dischargers in Maricopa County, alongside 3 historical FEMA federal disaster declarations (0 flood/storm events).
Does Maricopa County, AZ have expansive clay soil or foundation risk?
USDA regional soil engineering screening for Maricopa County indicates a MODERATE 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.