B74/100
LOS OSOS COMMUNITY SERVICES DISTRICT — Water Quality Report 2026
Serving 7,086 people · California
Water Source
Groundwater
County
—
System ID
CA4010016
Violations
2
Contaminant Test Results
3 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 1.47 mg/L | 1.30 mg/L | Over Limit |
PFOA | 0.015 µg/L | 0.004 µg/L | Over Limit |
PFOS | 0.012 µg/L | 0.004 µg/L | Over Limit |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2019.
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 OSOS COMMUNITY SERVICES DISTRICT
Is LOS OSOS COMMUNITY SERVICES DISTRICT water safe to drink?
LOS OSOS COMMUNITY SERVICES DISTRICT water receives a grade of B (74/100), which is considered good. Out of 52 contaminants tested, 3 exceed EPA legal limits. 3 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has LOS OSOS COMMUNITY SERVICES DISTRICT detected?
52 contaminants were tested in LOS OSOS COMMUNITY SERVICES DISTRICT's water. Notable contaminants include PFOA, PFOS, Copper (90th percentile). 3 exceed EPA legal limits (MCLs). 3 exceed EPA health goals (MCLGs).
Does LOS OSOS COMMUNITY SERVICES DISTRICT have any EPA violations?
Yes, LOS OSOS COMMUNITY SERVICES DISTRICT has 2 EPA violation(s) on record, with the most recent in 2019. Violation types include MR.
How many people does LOS OSOS COMMUNITY SERVICES DISTRICT serve?
LOS OSOS COMMUNITY SERVICES DISTRICT serves approximately 7,086 people, California.
What type of water does LOS OSOS COMMUNITY SERVICES DISTRICT provide?
LOS OSOS 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 CA4010016.
How does LOS OSOS COMMUNITY SERVICES DISTRICT compare to other utilities in California?
LOS OSOS COMMUNITY SERVICES DISTRICT scores 74/100 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.