A84/100
CITY OF SAN JOSE - NSJ/ALVISO — Water Quality Report 2026
Serving 45,559 people · California
Water Source
Purchased Surface Water
County
—
System ID
CA4310019
Violations
4
Contaminant Test Results
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2008.
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 CITY OF SAN JOSE - NSJ/ALVISO
Is CITY OF SAN JOSE - NSJ/ALVISO water safe to drink?
CITY OF SAN JOSE - NSJ/ALVISO water receives a grade of A (84/100), which is considered excellent. Out of 69 contaminants tested, none exceed EPA legal limits. The water meets federal safety standards.
What contaminants has CITY OF SAN JOSE - NSJ/ALVISO detected?
69 contaminants were tested in CITY OF SAN JOSE - NSJ/ALVISO's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does CITY OF SAN JOSE - NSJ/ALVISO have any EPA violations?
Yes, CITY OF SAN JOSE - NSJ/ALVISO has 4 EPA violation(s) on record, with the most recent in 2008. Violation types include MCL, MR, TT. 3 are health-based violations.
How many people does CITY OF SAN JOSE - NSJ/ALVISO serve?
CITY OF SAN JOSE - NSJ/ALVISO serves approximately 45,559 people, California. The system provides water to 1 community: San Jose.
What type of water does CITY OF SAN JOSE - NSJ/ALVISO provide?
CITY OF SAN JOSE - NSJ/ALVISO sources its water from purchased surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is CA4310019.
How does CITY OF SAN JOSE - NSJ/ALVISO compare to other utilities in California?
CITY OF SAN JOSE - NSJ/ALVISO 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.