A93/100
UKIAH, CITY OF — Water Quality Report 2026
Serving 16,607 people · California
Water Source
Surface Water
County
—
System ID
CA2310003
Violations
3
Contaminant Test Results
EPA Violation History
1
Violation (last 5yr)
1
Unresolved
0
Health-Related
TIER 3Unresolved
Failed to issue ongoing public notification
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
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 UKIAH, CITY OF
Is UKIAH, CITY OF water safe to drink?
UKIAH, CITY OF water receives a grade of A (93/100), which is considered excellent. Out of 69 contaminants tested, none exceed EPA legal limits. The water meets federal safety standards.
What contaminants has UKIAH, CITY OF detected?
69 contaminants were tested in UKIAH, CITY OF's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does UKIAH, CITY OF have any EPA violations?
Yes, UKIAH, CITY OF has 3 EPA violation(s) on record, with the most recent in 2022. Violation types include MR, MCL, Other. 1 are health-based violations.
How many people does UKIAH, CITY OF serve?
UKIAH, CITY OF serves approximately 16,607 people, California. The system provides water to 1 community: Ukiah.
What type of water does UKIAH, CITY OF provide?
UKIAH, 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 CA2310003.
How does UKIAH, CITY OF compare to other utilities in California?
UKIAH, CITY OF scores 93/100 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.