Half Moon Bay
Is Half Moon Bay tap water safe to drink?
Mostly yes — Half Moon Bay scores 98/100. This report aggregates EPA drinking water data across 1 local system in Half Moon Bay. We found 33 total violations (1 unresolved).
Real-Time Environment
Live: 03:00 PM☀️ No active precipitation. Rainfall can impact surface water turbidity and pollutant runoff in Half Moon Bay.
Water Quality Impact
🛡️ Home Water Treatment Needs
Should you invest in filtration or softening for your home in Half Moon Bay?
Expert Advice
Your water quality is excellent. Standard filtration is optional but can further enhance taste.
Buying a Filter?
Filtration technologies matched to Half Moon Bay contaminant records.
Baby Formula Safety
Guidance on preparing infant formula using municipal tap water in Half Moon Bay.
Homebuyer's Perspective
Municipal water quality in Half Moon Bay directly influences pipe corrosion rates and home filtration needs. The high safety score (98/100) suggests lower risk for plumbing corrosion and appliance scaling.
Health & Family Safety
Residents should monitor Lead (90th percentile) levels. Pregnant women and families with young children should consult the specific EPA health goals listed below.
View Health Risk Glossary →Compliance Record for Half Moon Bay
Based on EPA SDWIS violation records and contaminant test results for all water systems serving Half Moon Bay.
Frequently Asked Questions
Is Half Moon Bay tap water safe to drink?
Mostly yes — Half Moon Bay scores 98/100.
How many water systems serve Half Moon Bay?
Half Moon Bay is served by 1 public water system in our latest EPA-backed dataset.
How can I check water quality for my exact address in Half Moon Bay?
Use the WaterQ search tool to look up your ZIP code and view nearby systems, contaminant levels, and recent violations for Half Moon Bay.
What is the water quality score for Half Moon Bay?
The water quality score for Half Moon Bay is 98 out of 100, based on EPA contaminant data, violation history, and testing results across the 1 system serving the city.
What are the top contaminants in Half Moon Bay?
The top contaminants detected in Half Moon Bay include Lead (90th percentile). View detailed information on our contaminants page.
Half Moon Bay Water Quality Summary
Half Moon Bay, CA receives a water quality score of 98/100 (Grade A) based on EPA Safe Drinking Water Information System (SDWIS) compliance data for 1 public water system serving the area.
Half Moon Bay's water quality is above the national average, with strong compliance records and low contaminant levels. Residents generally receive clean, safe tap water that meets EPA standards.
Half Moon Bay's score of 98 is 9 points above the California state average of 89, and above the nationwide average of roughly 78/100 across all U.S. states.
Water quality data is sourced from the U.S. EPA SDWIS database and updated quarterly. Learn about our scoring methodology → Read our California water quality rankings report →
Key Contaminants
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Water Systems Serving Half Moon Bay (1)
Check Your Specific Address
Water quality can vary by neighborhood in Half Moon Bay.
Related
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