Water Quality in San Jose, CA (93523)
EPA violation data for public water systems serving ZIP code 93523.
Active Health Violations
23 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 86% of US ZIP codes.
Based on EPA compliance data. Not a substitute for an official water quality report from your utility.
3,502
Population
7
Water Systems
34
Violations (5yr)
23
Health-Based
Location
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Water Systems Serving This Area (7)
Cws - Bakersfield
Bakersfield, City Of
North Edwards Wd
12 health-basedNorth Muroc Mutual Water Company
Aerial Acres Water Company, Inc.
Sunset Apartments Ws
11 health-basedJ Trailer Park
Contaminants Found
A naturally occurring element that can cause cancer and other health effects at high levels.
Annual water quality report delivery requirement.
Missed testing deadlines — not a detection of bacteria.
Lead and copper testing requirement. Lead exposure can cause developmental harm in children.
At high levels, nitrate can cause blue baby syndrome in infants.
Lead & Copper Levels
Lead (Pb)
Within limitSampled: Jan 2025
How Does This Compare?
San Jose (93523) has more violations than 86% of US ZIP codes. The national average is 18.87 violations per ZIP over 5 years. This ZIP has 34.
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.