San Diego
Is San Diego tap water safe to drink?
Mostly yes — San Diego scores 86/100. This report aggregates EPA drinking water data across 2 local systems in San Diego. We found 0 total violations (0 unresolved).
Real-Time Environment
Live: 02:45 PM☀️ No active precipitation. Rainfall can impact surface water turbidity and pollutant runoff in San Diego.
Water Quality Impact
🛡️ Home Water Treatment Needs
Should you invest in filtration or softening for your home in San Diego?
Expert Advice
Your water quality is excellent. Standard filtration is optional but can further enhance taste.
Buying a Filter?
Should you buy a water purifier in San Diego? See our analysis.
Baby Formula Safety
Is San Diego tap water safe for infants? Critical safety guide.
Homebuyer's Perspective
For those looking to relocate to San Diego, water quality is a key factor in long-term property maintenance. The high safety score (86/100) suggests lower risk for plumbing corrosion and appliance scaling.
Health & Family Safety
Residents should monitor Nitrite levels. Pregnant women and families with young children should consult the specific EPA health goals listed below.
View Health Risk Glossary →Score Breakdown for San Diego
*Scores are calculated using weighted EPA monitoring data from the past 5 years.
Frequently Asked Questions
Is San Diego tap water safe to drink?
Mostly yes — San Diego scores 86/100.
How many water systems serve San Diego?
San Diego is served by 2 public water systems in our latest EPA-backed dataset.
How can I check water quality for my exact address in San Diego?
Use the WaterQ search tool to look up your ZIP code and view nearby systems, contaminant levels, and recent violations for San Diego.
What is the water quality score for San Diego?
The water quality score for San Diego is N/A out of 100, based on EPA contaminant data, violation history, and testing results for all serving water systems.
What are the top contaminants in San Diego?
The top contaminants detected in San Diego include Nitrite, Atrazine, Selenium. View detailed information on our contaminants page.
San Diego Water Quality Summary
San Diego, CA receives a water quality score of 86/100 (Grade B) based on EPA Safe Drinking Water Information System (SDWIS) compliance data for 6 public water systems serving the area.
San Diego'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.
Water quality data is sourced from the U.S. EPA SDWIS database and updated quarterly. Learn about our scoring methodology →
Key Contaminants
Water Systems Serving San Diego (2)
Check Your Specific Address
Water quality can vary by neighborhood in San Diego.
Related
Quick compare in California
Compare San Diego water quality: View all states · Contaminant library · How we score water quality