F13/100
ADELANTO, CITY OF — Water Quality Report 2026
Serving 39,930 people · California
Water Source
Groundwater
County
—
System ID
CA3610001
Violations
20
Contaminant Test Results
3 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 1.59 mg/L | 1.30 mg/L | Over Limit |
PFOS | 0.004 µg/L | 0.004 µg/L | Over Limit |
chlorate | 590.00 µg/L | — | Above Goal |
EPA Violation History
1
Violation (last 5yr)
1
Unresolved
0
Health-Related
TIER 3Unresolved
Exceeded the MCL for disinfection byproducts
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 ADELANTO, CITY OF
Is ADELANTO, CITY OF water safe to drink?
ADELANTO, CITY OF water receives a grade of F (13/100), which is considered failing. 2 contaminant(s) exceed EPA legal limits and 20 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has ADELANTO, CITY OF detected?
67 contaminants were tested in ADELANTO, CITY OF's water. Notable contaminants include Copper (90th percentile), PFOS, chlorate. 2 exceed EPA legal limits (MCLs). 3 exceed EPA health goals (MCLGs).
Does ADELANTO, CITY OF have any EPA violations?
Yes, ADELANTO, CITY OF has 20 EPA violation(s) on record, with the most recent in 2024. Violation types include MR, MCL. 12 are health-based violations.
How many people does ADELANTO, CITY OF serve?
ADELANTO, CITY OF serves approximately 39,930 people, California. The system provides water to 1 community: Adelanto.
What type of water does ADELANTO, CITY OF provide?
ADELANTO, CITY OF sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is CA3610001.
How does ADELANTO, CITY OF compare to other utilities in California?
ADELANTO, CITY OF scores 13/100 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.