A100/100
GOLDEN STATE WATER COMPANY - LOS OSOS — Water Quality Report 2026
Serving 5,924 people · California
Water Source
Groundwater
County
—
System ID
CA4010017
Violations
0
Contaminant Test Results
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 GOLDEN STATE WATER COMPANY - LOS OSOS
Is GOLDEN STATE WATER COMPANY - LOS OSOS water safe to drink?
GOLDEN STATE WATER COMPANY - LOS OSOS water receives a grade of A (100/100), which is considered excellent. Out of 31 contaminants tested, none exceed EPA legal limits. The water meets federal safety standards.
What contaminants has GOLDEN STATE WATER COMPANY - LOS OSOS detected?
31 contaminants were tested in GOLDEN STATE WATER COMPANY - LOS OSOS's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does GOLDEN STATE WATER COMPANY - LOS OSOS have any EPA violations?
No, GOLDEN STATE WATER COMPANY - LOS OSOS has zero EPA violations on record. This indicates consistent compliance with federal drinking water standards.
How many people does GOLDEN STATE WATER COMPANY - LOS OSOS serve?
GOLDEN STATE WATER COMPANY - LOS OSOS serves approximately 5,924 people, California.
What type of water does GOLDEN STATE WATER COMPANY - LOS OSOS provide?
GOLDEN STATE WATER COMPANY - LOS OSOS sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is CA4010017.
How does GOLDEN STATE WATER COMPANY - LOS OSOS compare to other utilities in California?
GOLDEN STATE WATER COMPANY - LOS OSOS scores 100/100 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.