San Mateo, California — Property Hazard, Flood Zone, Soil, Water & Market Guide
What Are the Major Property, Flood, Soil & Environmental Risks in San Mateo, CA?
Public U.S. EPA records track 2,632 regulated facilities in San Mateo, California (San Mateo County), including 1 High-Risk sites (0.0%) and 2 active violators. In addition to industrial waste, San Mateo properties are screened for Tap Water & Watershed Permits (99 systems), USDA Soil Foundation Shrink-Swell (MODERATE signal), 4 County FEMA Disaster Declarations, and EPA Zone 2 — Moderate Potential (2.0 – 4.0 pCi/L).
San Mateo, CA 6-in-1 Flood, Soil Foundation, Tap Water & Radon Signals
🔒 Parcel-Level Soil LEP %, Water Table Depth & Flood Zone Require Street Address Scan📊 San Mateo, CA Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 05, 2026)ZIP Codes in San Mateo, CA
Highest-Scored EPA Regulated Facilities in San Mateo, 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 Regulated EPA Enforcement Record #1 | 🔒 Exact Street & Parcel Redacted • SAN MATEO, CA (ZIP 94404 Sector) | MODERATE (44/100) | Violation Identified (3 qtrs NC) | 🔒 Federal Penalty on File • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #2 | 🔒 Exact Street & Parcel Redacted • SAN MATEO, CA (ZIP 94403 Sector) | MODERATE (37/100) | Violation (6 qtrs NC) | 🔒 6 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • SAN MATEO, CA (ZIP 94403 Sector) | MODERATE (34/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #4 | 🔒 Exact Street & Parcel Redacted • SAN MATEO, CA (ZIP 94403 Sector) | MODERATE (34/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #5 | 🔒 Exact Street & Parcel Redacted • SAN MATEO, CA (ZIP 94403 Sector) | MODERATE (34/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #6 | 🔒 Exact Street & Parcel Redacted • SAN MATEO, CA (ZIP 94402 Sector) | MODERATE (34/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #7 | 🔒 Exact Street & Parcel Redacted • SAN MATEO, CA (ZIP 94401 Sector) | MODERATE (34/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #8 | 🔒 Exact Street & Parcel Redacted • SAN MATEO, CA (ZIP 94403 Sector) | MODERATE (34/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| TELEPORT COMMUNICATIONS LLC FREE PREVIEW (LOW RISK) | 2475 FLORES ST, SAN MATEO, CA 94403 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| SMFC - BUS YARD FREE PREVIEW (LOW RISK) | 401 N. HUMBOLDT STREET, SAN MATEO, CA 94401 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| BUILDING ENGINEER FREE PREVIEW (LOW RISK) | 777 MARINERS ISLAND BLVD, SAN MATEO, CA 94404 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| NORTH SHOREVIEW ELEMENTARY SCHOOL FREE PREVIEW (LOW RISK) | 1301 CYPRESS AVE, SAN MATEO, CA 94401 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
Frequently Asked Questions — San Mateo, California Environmental Risk & Radon
How many EPA-regulated facilities are in San Mateo, CA?
U.S. EPA records track 2,632 regulated facilities in San Mateo, California, including 1 high-risk sites (0.0%), 2 active violators (0.1%), and 2,533 RCRA hazardous waste handlers (96.2%).
Which ZIP codes in San Mateo, CA have the most EPA-tracked sites?
Within San Mateo, regulated facilities are primarily concentrated across ZIP 94403 (1,063 sites), ZIP 94402 (802 sites), ZIP 94401 (630 sites), ZIP 94011 (6 sites).
How can I check a specific house or commercial property in San Mateo, CA?
Enter the exact street address in San Mateo into the FullPropertyReport radius scanner to screen all EPA ECHO, FRS, RCRA, TRI, USDA soil foundation shrink-swell, drinking water (SDWIS), FEMA flood zone, and county radon records within 0.5 to 3.0 miles.
Is tap water safe in San Mateo, CA and how many EPA water permits exist?
In San Mateo, CA, federal registries track 4 Safe Drinking Water (SDWIS) facilities, 95 Clean Water Act NPDES permits, and 22 impaired water body dischargers.
What is the soil foundation risk and FEMA flood disaster history in San Mateo, CA?
USDA regional soil screening for San Mateo indicates a MODERATE shrink-swell foundation signal, and San Mateo County has recorded 4 federal FEMA disaster declarations (4 flood/severe storm declarations). Run an address scan to unlock exact parcel soil LEP %, water table depth, and flood zone.