Water Quality in San Jose, CA (94020)
EPA violation data for public water systems serving ZIP code 94020.
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 57% of US ZIP codes.
Based on EPA compliance data. Not a substitute for an official water quality report from your utility.
1,694
Population
15
Water Systems
6
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
Cuesta La Honda Guild Inc
3 health-basedCamp Jones Gulch
Portola Improvement Association Mwc
All resolvedRedwood Terrace Mutual
Arastradero Mutual Water Company
Contaminants Found
Lead and copper testing requirement. Lead exposure can cause developmental harm in children.
Lead & Copper Levels
Lead (Pb)
Within limitSampled: Jan 2025
Copper (Cu)
Exceeds limitSampled: Jul 2024
How Does This Compare?
San Jose (94020) has more violations than 57% of US ZIP codes. The national average is 18.87 violations per ZIP over 5 years. This ZIP has 6.
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.
Activated Carbon Filter
Excellent for removing chlorine, chloramine, and disinfection byproducts like THMs and HAAs. Available as pitcher filters, countertop, or under-sink units.
Targets:THMs, HAAs, Chlorine, Chloramine, Taste & Odor
Look for:NSF/ANSI 42 & 53 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.