A84/100
CWSC KING CITY — Water Quality Report 2026
Serving 16,334 people · California
Water Source
Groundwater
County
—
System ID
CA2710009
Violations
1
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 1.35 mg/L | 1.30 mg/L | Over Limit |
chlorate | 700.00 µg/L | — | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 1992.
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 CWSC KING CITY
Is CWSC KING CITY water safe to drink?
CWSC KING CITY water receives a grade of A (84/100), which is considered excellent. Out of 67 contaminants tested, 1 exceed EPA legal limits. 2 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has CWSC KING CITY detected?
67 contaminants were tested in CWSC KING CITY's water. Notable contaminants include Copper (90th percentile), chlorate. 1 exceed EPA legal limits (MCLs). 2 exceed EPA health goals (MCLGs).
Does CWSC KING CITY have any EPA violations?
Yes, CWSC KING CITY has 1 EPA violation(s) on record, with the most recent in 1992. Violation types include MCL. 1 are health-based violations.
How many people does CWSC KING CITY serve?
CWSC KING CITY serves approximately 16,334 people, California. The system provides water to 1 community: San Jose.
What type of water does CWSC KING CITY provide?
CWSC KING CITY sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is CA2710009.
How does CWSC KING CITY compare to other utilities in California?
CWSC KING CITY scores 84/100 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.