A87/100
CWS - VISALIA — Water Quality Report 2026
Serving 148,496 people · California
Water Source
Groundwater
County
—
System ID
CA5410016
Violations
2
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
chlorate | 440.00 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 CWS - VISALIA
Is CWS - VISALIA water safe to drink?
CWS - VISALIA water receives a grade of A (87/100), which is considered excellent. Out of 73 contaminants tested, none exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has CWS - VISALIA detected?
73 contaminants were tested in CWS - VISALIA's water. Notable contaminants include chlorate. No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does CWS - VISALIA have any EPA violations?
Yes, CWS - VISALIA has 2 EPA violation(s) on record, with the most recent in 1992. Violation types include MCL. 2 are health-based violations.
How many people does CWS - VISALIA serve?
CWS - VISALIA serves approximately 148,496 people, California.
What type of water does CWS - VISALIA provide?
CWS - VISALIA sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is CA5410016.
How does CWS - VISALIA compare to other utilities in California?
CWS - VISALIA scores 87/100 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.