Water Quality in San Jose, CA (94402)
EPA violation data for public water systems serving ZIP code 94402.
Active Health Violations
3 health-based violations found in the past 5 years, with at least one still unresolved. Contaminant levels have exceeded federal safety limits. Consider testing your tap water independently.
More violations than 72% of US ZIP codes.
Based on EPA compliance data. Not a substitute for an official water quality report from your utility.
25,475
Population
15
Water Systems
13
Violations (5yr)
3
Health-Based
Location
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Water Systems Serving This Area (15)
City Of Daly City
California Water Service - San Mateo
City Of Redwood City
California Water Service-S San Francisco
California Water Service - Bear Gulch
City Of San Bruno
North Coast County Water Dist
Estero Municipal Improvement District
All resolvedCalifornia Water Service - San Carlos
City Of Burlingame
Mountain View Mobile Home Park
Dan Creek Lodge
Skylawn Memorial Park (Skylawn Inc)
1 health-basedShirk Mobile Home Park
1 health-basedBlue Lakes Mobile Home Park
1 health-basedContaminants Found
Lead and copper testing requirement. Lead exposure can cause developmental harm in children.
Annual water quality report delivery requirement.
Lead & Copper Levels
Lead (Pb)
Within limitSampled: Jan 2025
How Does This Compare?
San Jose (94402) has more violations than 72% of US ZIP codes. The national average is 18.87 violations per ZIP over 5 years. This ZIP has 13.
Recommended Water Filters
Based on health-based violations detected in your area, these filter types are commonly used to address similar contaminants. Consult your water utility's Consumer Confidence Report for the most current data.
Reverse Osmosis System
Highly effective at removing heavy metals, dissolved solids, and a wide range of contaminants. Recommended for homes with lead or arsenic concerns.
Targets:Lead, Copper, Arsenic, Mercury, Cadmium
Look for:NSF/ANSI 58 certified
Always look for filters certified by NSF International for the specific contaminants you want to remove. This is general educational information, not an endorsement of any specific product.