Palo Alto
Is Palo Alto tap water safe to drink?
Mostly yes — Palo Alto scores 96/100. This report aggregates EPA drinking water data across 2 local systems in Palo Alto. We found 30 total violations (4 unresolved).
Real-Time Environment
Live: 04:30 AM☀️ No active precipitation. Rainfall can impact surface water turbidity and pollutant runoff in Palo Alto.
Water Quality Impact
🛡️ Home Water Treatment Needs
Should you invest in filtration or softening for your home in Palo Alto?
Expert Advice
Your water quality is excellent. Standard filtration is optional but can further enhance taste.
Buying a Filter?
Wondering if Palo Alto tap water needs filtering? We break it down.
Baby Formula Safety
Mixing baby formula with Palo Alto tap water? Read this first.
Homebuyer's Perspective
If you're house-hunting in Palo Alto, water quality belongs on your due-diligence checklist alongside schools and crime data. The high safety score (96/100) 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 Palo Alto
Based on EPA SDWIS violation records and contaminant test results for all water systems serving Palo Alto.
Frequently Asked Questions
Is Palo Alto tap water safe to drink?
Mostly yes — Palo Alto scores 96/100.
How many water systems serve Palo Alto?
Palo Alto is served by 2 public water systems in our latest EPA-backed dataset.
How can I check water quality for my exact address in Palo Alto?
Use the WaterQ search tool to look up your ZIP code and view nearby systems, contaminant levels, and recent violations for Palo Alto.
What is the water quality score for Palo Alto?
The water quality score for Palo Alto is 96 out of 100, based on EPA contaminant data, violation history, and testing results across the 2 systems serving the city.
What are the top contaminants in Palo Alto?
The top contaminants detected in Palo Alto include Lead (90th percentile). View detailed information on our contaminants page.
Palo Alto Water Quality Summary
Palo Alto, CA receives a water quality score of 96/100 (Grade A) based on EPA Safe Drinking Water Information System (SDWIS) compliance data for 2 public water systems serving the area.
Palo Alto'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.
Palo Alto's score of 96 is 7 points above the California state average of 89, and above the nationwide average of roughly 78/100 across all U.S. states.
For residents and prospective homebuyers in Palo Alto, California, the local drinking water infrastructure delivers outstanding performance across its pair of municipal systems. These systems successfully evaluate the varied geology of the West Coast while buffering the community from the environmental influences of nearby agricultural zones and large urban centers. This high level of utility performance translates to clean, reliable tap water that supports the daily needs of this mid-size city.
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
Get notified if Palo Alto's water quality changes
Free email alert when the EPA reports a new violation or boil-water advisory for your water system. No spam — just the alerts you asked for.
By subscribing you agree to receive occasional water-quality alert emails. Unsubscribe anytime. See our Privacy Policy.
Water Systems Serving Palo Alto (2)
Check Your Specific Address
Water quality can vary by neighborhood in Palo Alto.
Related
Quick compare in California
Compare Palo Alto water quality: View all states · Contaminant library · How we score water quality