A84/100
CITY OF GILROY — Water Quality Report 2026
Serving 59,203 people · California
Water Source
Groundwater
County
—
System ID
CA4310004
Violations
1
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
PFOA | 0.006 µg/L | 0.004 µg/L | Over Limit |
Lead (90th percentile) | 0.002 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
1
Violation (last 5yr)
0
Unresolved
1
Health-Related
TIER 1 — URGENTResolved
Exceeded the Maximum Contaminant Level (single sample)
When: June 1, 2022 – June 30, 2022Enforcement: Formal — state order issued
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 GILROY
Is CITY OF GILROY water safe to drink?
CITY OF GILROY water receives a grade of A (84/100), which is considered excellent. Out of 66 contaminants tested, 1 exceed EPA legal limits. 2 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has CITY OF GILROY detected?
66 contaminants were tested in CITY OF GILROY's water. Notable contaminants include PFOA, Lead (90th percentile). 1 exceed EPA legal limits (MCLs). 2 exceed EPA health goals (MCLGs).
Does CITY OF GILROY have any EPA violations?
Yes, CITY OF GILROY has 1 EPA violation(s) on record, with the most recent in 2022. Violation types include MCL. 1 are health-based violations.
How many people does CITY OF GILROY serve?
CITY OF GILROY serves approximately 59,203 people, California. The system provides water to 1 community: Gilroy.
What type of water does CITY OF GILROY provide?
CITY OF GILROY sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is CA4310004.
How does CITY OF GILROY compare to other utilities in California?
CITY OF GILROY scores 84/100 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.