F19/100
DINUBA, CITY OF — Water Quality Report 2026
Serving 6,081 people · California
Water Source
Groundwater
County
—
System ID
CA5410002
Violations
18
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
vanadium | 52.00 µg/L | — | Above Goal |
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 DINUBA, CITY OF
Is DINUBA, CITY OF water safe to drink?
DINUBA, CITY OF water receives a grade of F (19/100), which is considered failing. 0 contaminant(s) exceed EPA legal limits and 18 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has DINUBA, CITY OF detected?
66 contaminants were tested in DINUBA, CITY OF's water. Notable contaminants include vanadium. No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does DINUBA, CITY OF have any EPA violations?
Yes, DINUBA, CITY OF has 18 EPA violation(s) on record, with the most recent in 2024. Violation types include RPT, TT, MCL. 15 are health-based violations.
How many people does DINUBA, CITY OF serve?
DINUBA, CITY OF serves approximately 6,081 people, California. The system provides water to 1 community: Dinuba.
What type of water does DINUBA, CITY OF provide?
DINUBA, CITY OF sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is CA5410002.
How does DINUBA, CITY OF compare to other utilities in California?
DINUBA, CITY OF scores 19/100 with a grade of F (failing). This score suggests significant water quality concerns relative to other utilities. Visit our California state page for a full comparison of water systems.