A80/100
GSWC-SOUTH ARCADIA — Water Quality Report 2026
Serving 27,072 people · California
Water Source
Groundwater
County
—
System ID
CA1910212
Violations
1
Contaminant Test Results
3 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
PFOS | 0.016 µg/L | 0.004 µg/L | Over Limit |
PFOA | 0.005 µg/L | 0.004 µg/L | Over Limit |
chlorate | 310.00 µg/L | — | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2000.
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 GSWC-SOUTH ARCADIA
Is GSWC-SOUTH ARCADIA water safe to drink?
GSWC-SOUTH ARCADIA water receives a grade of A (80/100), which is considered excellent. Out of 66 contaminants tested, 2 exceed EPA legal limits. 3 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has GSWC-SOUTH ARCADIA detected?
66 contaminants were tested in GSWC-SOUTH ARCADIA's water. Notable contaminants include PFOS, PFOA, chlorate. 2 exceed EPA legal limits (MCLs). 3 exceed EPA health goals (MCLGs).
Does GSWC-SOUTH ARCADIA have any EPA violations?
Yes, GSWC-SOUTH ARCADIA has 1 EPA violation(s) on record, with the most recent in 2000. Violation types include Other.
How many people does GSWC-SOUTH ARCADIA serve?
GSWC-SOUTH ARCADIA serves approximately 27,072 people, California.
What type of water does GSWC-SOUTH ARCADIA provide?
GSWC-SOUTH ARCADIA sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is CA1910212.
How does GSWC-SOUTH ARCADIA compare to other utilities in California?
GSWC-SOUTH ARCADIA scores 80/100 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.