A88/100
CITY OF FAIRFIELD — Water Quality Report 2026
Serving 120,377 people · California
Water Source
Surface Water
County
—
System ID
CA4810003
Violations
4
Contaminant Test Results
EPA Violation History
2
Violations (last 5yr)
2
Unresolved
1
Health-Related
TIER 3Unresolved
Reporting violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
TIER 2Unresolved
Treatment technique violation
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 FAIRFIELD
Is CITY OF FAIRFIELD water safe to drink?
CITY OF FAIRFIELD water receives a grade of A (88/100), which is considered excellent. Out of 76 contaminants tested, none exceed EPA legal limits. The water meets federal safety standards.
What contaminants has CITY OF FAIRFIELD detected?
76 contaminants were tested in CITY OF FAIRFIELD's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does CITY OF FAIRFIELD have any EPA violations?
Yes, CITY OF FAIRFIELD has 4 EPA violation(s) on record, with the most recent in 2024. Violation types include RPT, TT, MR. 2 are health-based violations.
How many people does CITY OF FAIRFIELD serve?
CITY OF FAIRFIELD serves approximately 120,377 people, California. The system provides water to 1 community: Fairfield.
What type of water does CITY OF FAIRFIELD provide?
CITY OF FAIRFIELD 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 CA4810003.
How does CITY OF FAIRFIELD compare to other utilities in California?
CITY OF FAIRFIELD scores 88/100 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.