A85/100
CITY OF WESTMINSTER — Water Quality Report 2026
Serving 90,911 people · California
Water Source
Purchased Surface Water
County
—
System ID
CA3010064
Violations
4
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.005 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2013.
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 WESTMINSTER
Is CITY OF WESTMINSTER water safe to drink?
CITY OF WESTMINSTER water receives a grade of A (85/100), which is considered excellent. Out of 69 contaminants tested, none exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has CITY OF WESTMINSTER detected?
69 contaminants were tested in CITY OF WESTMINSTER's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does CITY OF WESTMINSTER have any EPA violations?
Yes, CITY OF WESTMINSTER has 4 EPA violation(s) on record, with the most recent in 2013. Violation types include MR, MCL, Other. 2 are health-based violations.
How many people does CITY OF WESTMINSTER serve?
CITY OF WESTMINSTER serves approximately 90,911 people, California. The system provides water to 1 community: Westminster.
What type of water does CITY OF WESTMINSTER provide?
CITY OF WESTMINSTER 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 CA3010064.
How does CITY OF WESTMINSTER compare to other utilities in California?
CITY OF WESTMINSTER scores 85/100 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.