Water Quality in San Jose, CA (93203)
EPA violation data for public water systems serving ZIP code 93203.
Active Health Violations
29 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 85% of US ZIP codes.
Based on EPA compliance data. Not a substitute for an official water quality report from your utility.
20,712
Population
15
Water Systems
32
Violations (5yr)
29
Health-Based
Location
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Water Systems Serving This Area (15)
Cws - Bakersfield
Bakersfield, City Of
Arvin Community Services Dist
1 health-basedTravel Centers Of America
Arvin High School
Edmundson Acres Water System
Di Giorgio School Water System
13 health-basedCuyama Orchards Inc
Kern Ridge Growers
6 health-basedBakersfield National Cemetery Ws
1 health-basedMarchelle'S Water System
Idylwilde Tract Association
Heck Cellars Water System
8 health-basedKern County Autism Center
Mitchell'S Corner Water System
Contaminants Found
At high levels, nitrate can cause blue baby syndrome in infants.
A naturally occurring element that can cause cancer and other health effects at high levels.
Missed testing deadlines — not a detection of bacteria.
Lead and copper testing requirement. Lead exposure can cause developmental harm in children.
Lead & Copper Levels
Lead (Pb)
Within limitSampled: Jan 2023
How Does This Compare?
San Jose (93203) has more violations than 85% of US ZIP codes. The national average is 18.87 violations per ZIP over 5 years. This ZIP has 32.
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
UV Water Purifier
Uses ultraviolet light to neutralize bacteria, viruses, and parasites without chemicals. Ideal for homes with microbial contamination concerns.
Targets:E. coli, Coliform, Giardia, Cryptosporidium
Look for:NSF/ANSI 55 (Class A) 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.