A89/100
IRVINE RANCH WATER DISTRICT — Water Quality Report 2026
Serving 444,800 people · California
Water Source
Surface Water
County
—
System ID
CA3010092
Violations
3
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 IRVINE RANCH WATER DISTRICT
Is IRVINE RANCH WATER DISTRICT water safe to drink?
IRVINE RANCH WATER DISTRICT water receives a grade of A (89/100), which is considered excellent. Out of 76 contaminants tested, none exceed EPA legal limits. The water meets federal safety standards.
What contaminants has IRVINE RANCH WATER DISTRICT detected?
76 contaminants were tested in IRVINE RANCH WATER DISTRICT's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does IRVINE RANCH WATER DISTRICT have any EPA violations?
Yes, IRVINE RANCH WATER DISTRICT has 3 EPA violation(s) on record, with the most recent in 2020. Violation types include MON, TT, MCL. 2 are health-based violations.
How many people does IRVINE RANCH WATER DISTRICT serve?
IRVINE RANCH WATER DISTRICT serves approximately 444,800 people, California.
What type of water does IRVINE RANCH WATER DISTRICT provide?
IRVINE RANCH WATER DISTRICT 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 CA3010092.
How does IRVINE RANCH WATER DISTRICT compare to other utilities in California?
IRVINE RANCH WATER DISTRICT scores 89/100 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.