A81/100
CITY OF TUSTIN — Water Quality Report 2026
Serving 66,600 people · California
Water Source
Purchased Surface Water
County
—
System ID
CA3010046
Violations
7
Contaminant Test Results
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2018.
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 CITY OF TUSTIN
Is CITY OF TUSTIN water safe to drink?
CITY OF TUSTIN water receives a grade of A (81/100), which is considered excellent. Out of 69 contaminants tested, none exceed EPA legal limits. The water meets federal safety standards.
What contaminants has CITY OF TUSTIN detected?
69 contaminants were tested in CITY OF TUSTIN's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does CITY OF TUSTIN have any EPA violations?
Yes, CITY OF TUSTIN has 7 EPA violation(s) on record, with the most recent in 2018. Violation types include MR, MCL. 3 are health-based violations.
How many people does CITY OF TUSTIN serve?
CITY OF TUSTIN serves approximately 66,600 people, California. The system provides water to 1 community: Tustin.
What type of water does CITY OF TUSTIN provide?
CITY OF TUSTIN sources its water from purchased surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is CA3010046.
How does CITY OF TUSTIN compare to other utilities in California?
CITY OF TUSTIN scores 81/100 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.