B62/100
CITY OF GRIDLEY — Water Quality Report 2026
Serving 7,269 people · California
Water Source
Groundwater
County
—
System ID
CA0410004
Violations
6
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
PFHxS | 0.012 µg/L | 0.010 µg/L | Over Limit |
PFOS | 0.009 µg/L | 0.004 µg/L | Over Limit |
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 GRIDLEY
Is CITY OF GRIDLEY water safe to drink?
CITY OF GRIDLEY water receives a grade of B (62/100), which is considered good. Out of 31 contaminants tested, 2 exceed EPA legal limits. 2 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has CITY OF GRIDLEY detected?
31 contaminants were tested in CITY OF GRIDLEY's water. Notable contaminants include PFOS, PFHxS. 2 exceed EPA legal limits (MCLs). 2 exceed EPA health goals (MCLGs).
Does CITY OF GRIDLEY have any EPA violations?
Yes, CITY OF GRIDLEY has 6 EPA violation(s) on record, with the most recent in 2024. Violation types include RPT, TT, MCL. 4 are health-based violations.
How many people does CITY OF GRIDLEY serve?
CITY OF GRIDLEY serves approximately 7,269 people, California. The system provides water to 1 community: Gridley.
What type of water does CITY OF GRIDLEY provide?
CITY OF GRIDLEY sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is CA0410004.
How does CITY OF GRIDLEY compare to other utilities in California?
CITY OF GRIDLEY scores 62/100 with a grade of B (good). This is an above-average performance for utilities statewide. Visit our California state page for a full comparison of water systems.