B60/100
YUCAIPA VALLEY WATER DISTRICT — Water Quality Report 2026
Serving 52,010 people · California
Water Source
Surface Water
County
—
System ID
CA3610055
Violations
9
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 30.00 mg/L | 1.30 mg/L | Over Limit |
chlorate | 220.00 µg/L | — | Above Goal |
EPA Violation History
3
Violations (last 5yr)
1
Unresolved
2
Health-Related
TIER 2Unresolved
Exceeded the Maximum Contaminant Level (running average)
When: July 1, 2024 – September 30, 2024Rule: Stage 2 DBPREnforcement: Formal — state order issuedVerify on EPA.gov
TIER 1 — URGENTResolved
Exceeded the Maximum Contaminant Level (single sample)
When: April 1, 2023 – June 30, 2023Enforcement: Formal — state order issued
TIER 3Resolved
Disinfection byproduct treatment technique failure
When: April 13, 2021 – October 19, 2023Rule: Ground Water RuleEnforcement: 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 YUCAIPA VALLEY WATER DISTRICT
Is YUCAIPA VALLEY WATER DISTRICT water safe to drink?
YUCAIPA VALLEY WATER DISTRICT water receives a grade of B (60/100), which is considered good. Out of 70 contaminants tested, 1 exceed EPA legal limits. 2 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has YUCAIPA VALLEY WATER DISTRICT detected?
70 contaminants were tested in YUCAIPA VALLEY WATER DISTRICT's water. Notable contaminants include Copper (90th percentile), chlorate. 1 exceed EPA legal limits (MCLs). 2 exceed EPA health goals (MCLGs).
Does YUCAIPA VALLEY WATER DISTRICT have any EPA violations?
Yes, YUCAIPA VALLEY WATER DISTRICT has 9 EPA violation(s) on record, with the most recent in 2024. Violation types include MCL, Other, MR. 5 are health-based violations.
How many people does YUCAIPA VALLEY WATER DISTRICT serve?
YUCAIPA VALLEY WATER DISTRICT serves approximately 52,010 people, California.
What type of water does YUCAIPA VALLEY WATER DISTRICT provide?
YUCAIPA VALLEY WATER DISTRICT sources its water from surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is CA3610055.
How does YUCAIPA VALLEY WATER DISTRICT compare to other utilities in California?
YUCAIPA VALLEY WATER DISTRICT scores 60/100 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.