A97/100
LA PUENTE VALLEY CWD — Water Quality Report 2026
Serving 8,243 people · California
Water Source
Groundwater
County
—
System ID
CA1910060
Violations
0
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 5.60 mg/L | 1.30 mg/L | Over Limit |
EPA Violation History
No violations in the past 5 years
This system has a clean compliance history.
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 LA PUENTE VALLEY CWD
Is LA PUENTE VALLEY CWD water safe to drink?
LA PUENTE VALLEY CWD water receives a grade of A (97/100), which is considered excellent. Out of 32 contaminants tested, 1 exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has LA PUENTE VALLEY CWD detected?
32 contaminants were tested in LA PUENTE VALLEY CWD's water. Notable contaminants include Copper (90th percentile). 1 exceed EPA legal limits (MCLs). 1 exceed EPA health goals (MCLGs).
Does LA PUENTE VALLEY CWD have any EPA violations?
No, LA PUENTE VALLEY CWD has zero EPA violations on record. This indicates consistent compliance with federal drinking water standards.
How many people does LA PUENTE VALLEY CWD serve?
LA PUENTE VALLEY CWD serves approximately 8,243 people, California.
What type of water does LA PUENTE VALLEY CWD provide?
LA PUENTE VALLEY CWD sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is CA1910060.
How does LA PUENTE VALLEY CWD compare to other utilities in California?
LA PUENTE VALLEY CWD scores 97/100 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.