Atherton, California — Property Hazard, Flood Zone, Soil, Water & Market Guide
What Are the Major Property, Flood, Soil & Environmental Risks in Atherton, CA?
Public U.S. EPA records track 320 regulated facilities in Atherton, California (San Mateo County), including 0 High-Risk sites (0.0%) and 0 active violators. In addition to industrial waste, Atherton properties are screened for Tap Water & Watershed Permits (52 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).
Atherton, CA 6-in-1 Flood, Soil Foundation, Tap Water & Radon Signals
🔒 Parcel-Level Soil LEP %, Water Table Depth & Flood Zone Require Street Address Scan📊 Atherton, CA Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 03, 2026)ZIP Codes in Atherton, CA
Highest-Scored EPA Regulated Facilities in Atherton, 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 • ATHERTON, CA (ZIP 94027 Sector) | MODERATE (34/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #2 | 🔒 Exact Street & Parcel Redacted • ATHERTON, CA (ZIP 94027 Sector) | MODERATE (34/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • ATHERTON, CA (ZIP 94027 Sector) | MODERATE (34/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #4 | 🔒 Exact Street & Parcel Redacted • ATHERTON, CA (ZIP 94027 Sector) | MODERATE (34/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #5 | 🔒 Exact Street & Parcel Redacted • ATHERTON, CA (ZIP 94027 Sector) | MODERATE (34/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #6 | 🔒 Exact Street & Parcel Redacted • ATHERTON, CA (ZIP 94027 Sector) | MODERATE (34/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #7 | 🔒 Exact Street & Parcel Redacted • ATHERTON, CA (ZIP 94027 Sector) | MODERATE (34/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #8 | 🔒 Exact Street & Parcel Redacted • ATHERTON, CA (ZIP 94027 Sector) | MODERATE (34/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| SACRED HEART SCHOOLS, ATHERTON FREE PREVIEW (LOW RISK) | 150 VALPARAISO AVE, ATHERTON, CA 94027 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| LAS LOMITAS SCHOOL FREE PREVIEW (LOW RISK) | 299 ALAMEDA DE LAS PULGAS, ATHERTON, CA 94027 | LOW (16/100) | No Violation Identified (0 qtrs NC) | $0 |
| PGE - D-1714A ATHERTON FREE PREVIEW (LOW RISK) | LAT/LONG_USED, ATHERTON, CA 94027 | LOW (16/100) | No Violation Identified (0 qtrs NC) | $0 |
| MEHTA PLASTIC SURGERY FREE PREVIEW (LOW RISK) | 3351 EL CAMINO REAL, ATHERTON, CA 94027 | LOW (16/100) | No Violation Identified (0 qtrs NC) | $0 |
Frequently Asked Questions — Atherton, California Environmental Risk & Radon
How many EPA-regulated facilities are in Atherton, CA?
U.S. EPA records track 320 regulated facilities in Atherton, California, including 0 high-risk sites (0.0%), 0 active violators (0.0%), and 270 RCRA hazardous waste handlers (84.4%).
Which ZIP codes in Atherton, CA have the most EPA-tracked sites?
Within Atherton, regulated facilities are primarily concentrated across ZIP 94070 (1,466 sites), ZIP 94027 (320 sites).
How can I check a specific house or commercial property in Atherton, CA?
Enter the exact street address in Atherton 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 Atherton, CA and how many EPA water permits exist?
In Atherton, CA, federal registries track 1 Safe Drinking Water (SDWIS) facilities, 51 Clean Water Act NPDES permits, and 0 impaired water body dischargers.
What is the soil foundation risk and FEMA flood disaster history in Atherton, CA?
USDA regional soil screening for Atherton 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.