A89/100
LOS ALAMOS COMMUNITY SERVICES DISTRICT — Water Quality Report 2026
Serving 1,534 people · California
Water Source
Groundwater
County
—
System ID
CA4210002
Violations
3
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 1.96 mg/L | 1.30 mg/L | Over Limit |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2018.
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 LOS ALAMOS COMMUNITY SERVICES DISTRICT
Is LOS ALAMOS COMMUNITY SERVICES DISTRICT water safe to drink?
LOS ALAMOS COMMUNITY SERVICES DISTRICT water receives a grade of A (89/100), which is considered excellent. Out of 2 contaminants tested, 1 exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has LOS ALAMOS COMMUNITY SERVICES DISTRICT detected?
2 contaminants were tested in LOS ALAMOS COMMUNITY SERVICES DISTRICT's water. Notable contaminants include Copper (90th percentile). 1 exceed EPA legal limits (MCLs). 1 exceed EPA health goals (MCLGs).
Does LOS ALAMOS COMMUNITY SERVICES DISTRICT have any EPA violations?
Yes, LOS ALAMOS COMMUNITY SERVICES DISTRICT has 3 EPA violation(s) on record, with the most recent in 2018. Violation types include MR.
How many people does LOS ALAMOS COMMUNITY SERVICES DISTRICT serve?
LOS ALAMOS COMMUNITY SERVICES DISTRICT serves approximately 1,534 people, California.
What type of water does LOS ALAMOS COMMUNITY SERVICES DISTRICT provide?
LOS ALAMOS COMMUNITY SERVICES DISTRICT sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is CA4210002.
How does LOS ALAMOS COMMUNITY SERVICES DISTRICT compare to other utilities in California?
LOS ALAMOS COMMUNITY SERVICES DISTRICT scores 89/100 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.