A83/100
SAN DIEGO, CITY OF — Water Quality Report 2026
Serving 1,385,379 people · California
Water Source
Surface Water
County
—
System ID
CA3710020
Violations
13
Contaminant Test Results
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2020.
Understanding violation severity
Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.
Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly
Frequently Asked Questions About SAN DIEGO, CITY OF
Is SAN DIEGO, CITY OF water safe to drink?
SAN DIEGO, CITY OF water receives a grade of A (83/100), which is considered excellent. Out of 76 contaminants tested, none exceed EPA legal limits. The water meets federal safety standards.
What contaminants has SAN DIEGO, CITY OF detected?
76 contaminants were tested in SAN DIEGO, CITY OF's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does SAN DIEGO, CITY OF have any EPA violations?
Yes, SAN DIEGO, CITY OF has 13 EPA violation(s) on record, with the most recent in 2020. Violation types include MON, MR, MCL. 1 are health-based violations.
How many people does SAN DIEGO, CITY OF serve?
SAN DIEGO, CITY OF serves approximately 1,385,379 people, California. The system provides water to 1 community: San Diego.
What type of water does SAN DIEGO, CITY OF provide?
SAN DIEGO, CITY OF sources its water from surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is CA3710020.
How does SAN DIEGO, CITY OF compare to other utilities in California?
SAN DIEGO, CITY OF scores 83/100 with a grade of A (excellent). This places it among the higher-performing utilities in the state. Visit our California state page for a full comparison of water systems.