Half Moon Bay, California — Property Hazard, Flood Zone, Soil, Water & Market Guide
What Are the Major Property, Flood, Soil & Environmental Risks in Half Moon Bay, CA?
Public U.S. EPA records track 285 regulated facilities in Half Moon Bay, California (San Mateo County), including 2 High-Risk sites (0.7%) and 3 active violators. In addition to industrial waste, Half Moon Bay properties are screened for Tap Water & Watershed Permits (33 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).
Half Moon Bay, CA 6-in-1 Flood, Soil Foundation, Tap Water & Radon Signals
🔒 Parcel-Level Soil LEP %, Water Table Depth & Flood Zone Require Street Address Scan📊 Half Moon Bay, CA Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 05, 2026)ZIP Codes in Half Moon Bay, CA
Highest-Scored EPA Regulated Facilities in Half Moon Bay, 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 • HALF MOON BAY, CA (ZIP 94019 Sector) | HIGH (94/100) | Significant Violation (12 qtrs NC) | 🔒 $10,000+ Federal Fine • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #2 | 🔒 Exact Street & Parcel Redacted • HALF MOON BAY, CA (ZIP 94019 Sector) | MODERATE (34/100) | Unknown (5 qtrs NC) | 🔒 5 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • HALF MOON BAY, CA (ZIP 94019 Sector) | MODERATE (34/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #4 | 🔒 Exact Street & Parcel Redacted • HALF MOON BAY, CA (ZIP 94019 Sector) | MODERATE (34/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #5 | 🔒 Exact Street & Parcel Redacted • HALF MOON BAY, CA (ZIP 94019 Sector) | MODERATE (34/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #6 | 🔒 Exact Street & Parcel Redacted • HALF MOON BAY, CA (ZIP 94019 Sector) | MODERATE (34/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #7 | 🔒 Exact Street & Parcel Redacted • HALF MOON BAY, CA (ZIP 94019 Sector) | MODERATE (34/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #8 | 🔒 Exact Street & Parcel Redacted • HALF MOON BAY, CA (ZIP 94019 Sector) | MODERATE (34/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| HALF MOON BAY AIRPORT FREE PREVIEW (LOW RISK) | 9850 CABRILLO HWY, HALF MOON BAY, CA 94019 | LOW (23/100) | No Violation Identified (0 qtrs NC) | $0 |
| CALTRANS DISTRICT 4 EA 0Q1304 FREE PREVIEW (LOW RISK) | RTE 1 PM 27.5 TO 34.8, HALF MOON BAY, CA 94019 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| COAST TRASMISSIONS FREE PREVIEW (LOW RISK) | 141 MAIN ST, HALF MOON BAY, CA 94019 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| ANDREOTTI FAMILY FARM FREE PREVIEW (LOW RISK) | 227 KELLY AVE, HALF MOON BAY, CA 94019 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
Frequently Asked Questions — Half Moon Bay, California Environmental Risk & Radon
How many EPA-regulated facilities are in Half Moon Bay, CA?
U.S. EPA records track 285 regulated facilities in Half Moon Bay, California, including 2 high-risk sites (0.7%), 3 active violators (1.1%), and 253 RCRA hazardous waste handlers (88.8%).
Which ZIP codes in Half Moon Bay, CA have the most EPA-tracked sites?
Within Half Moon Bay, regulated facilities are primarily concentrated across ZIP 94019 (293 sites), ZIP 94091 (2 sites).
How can I check a specific house or commercial property in Half Moon Bay, CA?
Enter the exact street address in Half Moon Bay 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 Half Moon Bay, CA and how many EPA water permits exist?
In Half Moon Bay, CA, federal registries track 1 Safe Drinking Water (SDWIS) facilities, 32 Clean Water Act NPDES permits, and 10 impaired water body dischargers.
What is the soil foundation risk and FEMA flood disaster history in Half Moon Bay, CA?
USDA regional soil screening for Half Moon Bay 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.