Water Quality in San Jose, CA (93221)
EPA violation data for public water systems serving ZIP code 93221.
Active Health Violations
21 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 84% of US ZIP codes.
Based on EPA compliance data. Not a substitute for an official water quality report from your utility.
14,538
Population
24
Water Systems
29
Violations (5yr)
21
Health-Based
Location
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Water Systems Serving This Area (24)
Cws - Visalia
Tulare, City Of
Porterville, City Of
1 health-basedExeter, City Of
1 health-basedTooleville Mutual Non Profit Water Assn
1 health-basedBadger Hill Estates
The Barn
6 health-basedExeter Kingdom Hall
Sun Pacific Shippers Lp - Exeter
1 health-basedKaweah High School
Sierra View Jr Academy
4 health-basedInternational Paper - Exeter Bulk
Mcwane Plant And Industrial, Llc
1 health-basedCalifornia Citrus Association
5 health-basedLo Bue Bros - Exeter
Willitts Equipment Company, Inc.
Hillside Trailer Park
Polymerpak
Le Monde Resort
Mineral King Motel
Courage To Change
1 health-basedSequoia Mining Co
Red Barn Mercantile
Jack Griggs Inc.
Contaminants Found
At high levels, nitrate can cause blue baby syndrome in infants.
Missed testing deadlines — not a detection of bacteria.
Lead & Copper Levels
Lead (Pb)
Within limitSampled: Jan 2025
How Does This Compare?
San Jose (93221) has more violations than 84% of US ZIP codes. The national average is 18.87 violations per ZIP over 5 years. This ZIP has 29.
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.