ZIP 94019 (Half Moon Bay, CA) — Flood Zone, Water Quality, Soil Foundation, Radon & EPA Hazards
ZIP code 94019 in Half Moon Bay, California (San Mateo County) has 293 EPA-tracked facilities, including 2 High-Risk sites (0.7%), 3 active violators, and $148,000 in federal penalties. Beyond industrial pollution, properties in ZIP 94019 are screened across 4 historical San Mateo County FEMA disasters, USDA Soil Foundation Shrink-Swell (MODERATE signal), Tap Water & Watershed Permits (35), and EPA Zone 2 — Moderate Potential (2.0 – 4.0 pCi/L).
ZIP 94019 (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📊 ZIP 94019 (Half Moon Bay, CA) Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 02, 2026)ZIP 94019 Sector Screening Map (High-Risk Pin Coordinates Locked)
Exact street pins for 2 High-Risk and 3 Active Violation sites are redacted on public directory maps.
Regulated EPA Facilities in ZIP 94019 (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 Score (0–100) | 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 • SAN MATEO, 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 — ZIP 94019 (Half Moon Bay, CA) EPA Dataset & Radon
DATASET: U.S. EPA ECHO • FRS • RCRAInfo • TRI (November 02, 2026)How many EPA-tracked environmental sites are in ZIP code 94019 (Half Moon Bay, CA)?
ZIP code 94019 (Half Moon Bay, CA) contains 293 EPA-tracked facilities, of which 2 (0.7%) are classified in the High-Risk tier, 3 (1.0%) have active compliance violations, and 259 (88.4%) handle RCRA hazardous waste.
How does ZIP 94019 compare to San Mateo County and California averages?
In ZIP 94019, 0.7% of regulated sites are rated High Risk, compared to 0.1% across San Mateo County and 0.3% statewide in California.
What is the EPA Radon Zone and ASTM Phase I screening radius for ZIP 94019?
Geologic screening places ZIP 94019 in EPA Zone 2 — Moderate Potential (2.0 – 4.0 pCi/L). Property buyers should screen a 0.25-mile immediate buffer for vapor-intrusion sources and a 1.0-mile radius for CERCLA/RCRA sites.
Is ZIP 94019 (Half Moon Bay, CA) in a FEMA flood zone and what is the flood disaster history?
San Mateo County has recorded 4 historical FEMA federal disaster declarations (4 flood, hurricane, or severe storm declarations). Run a street address scan in ZIP 94019 to unlock the exact parcel FEMA flood zone (AE / VE / X) and mandatory flood insurance status.
Does ZIP 94019 have expansive clay soil, foundation problems, or drinking water violations?
USDA regional soil screening for ZIP 94019 indicates a MODERATE shrink-swell risk signal. Within ZIP 94019, federal registries track 1 SDWIS drinking water facilities, 34 Clean Water NPDES permits, and 11 impaired water body dischargers. Unlock a full property report for exact soil LEP %, water table depth, and utility violation dockets.