A87/100
CITY OF GUSTINE — Water Quality Report 2026
Serving 6,110 people · California
Water Source
Groundwater
County
—
System ID
CA2410003
Violations
9
Contaminant Test Results
EPA Violation History
2
Violations (last 5yr)
2
Unresolved
1
Health-Related
TIER 2Unresolved
Treatment technique violation
TIER 3Unresolved
Reporting violation
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 CITY OF GUSTINE
Is CITY OF GUSTINE water safe to drink?
CITY OF GUSTINE water receives a grade of A (87/100), which is considered excellent. Out of 31 contaminants tested, none exceed EPA legal limits. The water meets federal safety standards.
What contaminants has CITY OF GUSTINE detected?
31 contaminants were tested in CITY OF GUSTINE's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does CITY OF GUSTINE have any EPA violations?
Yes, CITY OF GUSTINE has 9 EPA violation(s) on record, with the most recent in 2024. Violation types include TT, RPT, MR. 1 are health-based violations.
How many people does CITY OF GUSTINE serve?
CITY OF GUSTINE serves approximately 6,110 people, California. The system provides water to 1 community: Gustine.
What type of water does CITY OF GUSTINE provide?
CITY OF GUSTINE sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is CA2410003.
How does CITY OF GUSTINE compare to other utilities in California?
CITY OF GUSTINE scores 87/100 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.