Santa Clara County, California — Property Hazard, Flood Zone, Soil, Water & EPA Guide
What Are the Flood, Soil Foundation & EPA Risks in Santa Clara County, CA?
In Santa Clara County, California, public U.S. EPA records track 34,731 regulated facilities (#4 of 136 in California), including 54 (0.2%) High-Risk sites and $25,029,607 in federal penalties. Countywide due diligence also covers 139 Safe Drinking Water (SDWIS) facilities, 1,216 Clean Water NPDES permits, 4 FEMA Federal Disaster Declarations (4 flood/storm), USDA Soil Foundation Shrink-Swell (MODERATE signal), and EPA Zone 2 — Moderate Potential (2.0 – 4.0 pCi/L).
Santa Clara County, CA 6-in-1 Flood, Soil Foundation, Tap Water & Radon Signals
🔒 Parcel-Level Soil LEP %, Water Table Depth & Flood Zone Require Street Address Scan📊 Santa Clara County, CA Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 05, 2026)Municipalities in Santa Clara County
ZIP Codes in Santa Clara County
Top EPA Regulated Facilities in Santa Clara County, CA
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 • SAN JOSE, CA (ZIP 95133 Sector) | HIGH (98/100) | Significant Violation (12 qtrs NC) | 🔒 $100,000+ Federal Fine • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #2 | 🔒 Exact Street & Parcel Redacted • MORGAN HILL, CA (ZIP 95037 Sector) | HIGH (98/100) | Significant Violation (12 qtrs NC) | 🔒 $100,000+ Federal Fine • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • SUNNYVALE, CA (ZIP 94086 Sector) | HIGH (91/100) | Significant Violation (12 qtrs NC) | 🔒 $10,000+ Federal Fine • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #4 | 🔒 Exact Street & Parcel Redacted • CUPERTINO, CA (ZIP 95014 Sector) | HIGH (89/100) | Significant Violation (12 qtrs NC) | 🔒 $100,000+ Federal Fine • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #5 | 🔒 Exact Street & Parcel Redacted • SAN JOSE, CA (ZIP 95120 Sector) | HIGH (89/100) | Significant Violation (12 qtrs NC) | 🔒 $10,000+ Federal Fine • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #6 | 🔒 Exact Street & Parcel Redacted • SUNNYVALE, CA (ZIP 94089 Sector) | HIGH (86/100) | Significant Violation (12 qtrs NC) | 🔒 $10,000+ Federal Fine • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #7 | 🔒 Exact Street & Parcel Redacted • SAN JOSE, CA (ZIP 95134 Sector) | HIGH (85/100) | Significant Violation (12 qtrs NC) | 🔒 Federal Penalty on File • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #8 | 🔒 Exact Street & Parcel Redacted • SANTA CLARA, CA (ZIP 95050 Sector) | HIGH (74/100) | Significant Violation (12 qtrs NC) | 🔒 12 Qtrs Non-Compliance • Unlock → |
| 651 WALSH PARTNERS, LLC FREE PREVIEW (LOW RISK) | 651 WALSH AVENUE, SANTA CLARA, CA 95050 | LOW (15/100) | No Violation Identified (0 qtrs NC) | $0 |
| EMERALD VALLEY MUTUAL WATER COMPANY FREE PREVIEW (LOW RISK) | , , CA | LOW (13/100) | No Violation Identified (0 qtrs NC) | $0 |
| MT. EDEN MUTUAL WATER COMPANY FREE PREVIEW (LOW RISK) | , SARATOGA, CA 95070 | LOW (10/100) | No Violation Identified (0 qtrs NC) | $0 |
Frequently Asked Questions — Santa Clara County, California Environmental Due Diligence
How many EPA-regulated environmental sites are in Santa Clara County, California?
Public U.S. EPA records track 34,731 regulated facilities in Santa Clara County, California (ranking #4 of 136 jurisdictions in CA). Of those, 54 (0.2%) are classified in the High-Risk tier due to significant enforcement or chemical release history, and 62 (0.2%) have active non-compliance quarters.
Which ZIP codes and cities in Santa Clara County have the highest regulated facility density?
Within Santa Clara County, the highest concentrations of EPA-tracked facilities are located in ZIP 95112 (San Jose, 1,524 sites), ZIP 95123 (San Jose, 1,501 sites), ZIP 94087 (Sunnyvale, 1,450 sites), spanning municipal corridors including San Jose (17,017 sites), Santa Clara (3,763 sites), Sunnyvale (3,580 sites).
How many hazardous waste (RCRA) and toxic release (TRI) handlers operate in Santa Clara County?
Across Santa Clara County, 34,317 facilities (98.8% 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 Santa Clara County, CA?
Geologic indoor air screening places Santa Clara 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 Santa Clara County, CA?
Federal records track 139 Safe Drinking Water (SDWIS) facilities, 1,216 Clean Water Act NPDES permits, and 201 impaired water dischargers in Santa Clara County, alongside 4 historical FEMA federal disaster declarations (4 flood/storm events).
Does Santa Clara County, CA have expansive clay soil or foundation risk?
USDA regional soil engineering screening for Santa Clara 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.