Water Quality in San Jose, CA (93230)
EPA violation data for public water systems serving ZIP code 93230.
Active Health Violations
38 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 90% of US ZIP codes.
Based on EPA compliance data. Not a substitute for an official water quality report from your utility.
69,684
Population
54
Water Systems
49
Violations (5yr)
38
Health-Based
Location
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Water Systems Serving This Area (54)
Cws - Visalia
Tulare, City Of
Porterville, City Of
1 health-basedHanford, City Of
1 health-basedLemoore, City Of
13 health-basedCorcoran, City Of
Lemoore Naval Air Station
Avenal, City Of
5 health-basedHanford Joint Union H.S. East Campus
Hanford Ice Company
Stratford Pud
Del Monte Foods, Inc. Plant #24
All resolvedKings River Hardwick School
Central Valley Meat Co Inc
4 health-basedPioneer Elementary School
Armstrong Rubber Co
Beacon Truck Stop Kingman
Kit Carson Elem School
Lakeside Elementary School
Western Acres Mutual Water Company
All resolvedNichols Farms
Kettleman City Elementary
Hanford First Baptist Church
Hammond Water System
Kings Outreach Boys Ranch
Sunset Estates Mutual Water Co
Hanford Christian School
Warmerdam Packing Llc
Burris Park
Hickey Park
Homegrown Cold Storage
Leon'S Market
Standard Register Co
Hamblin Mutual Water Co
Simcal Chemical Company
Hardwick Water Company
1 health-basedNetto Ag Inc.
13 health-basedLakeside Cafe
Kings Country Club
Beacon Station #617
Grangeville Market
Hanford Nut Shoppe
Joes Locker Service
Fred S Beacon - Inactive
S And H Fruit Market
Kingston-Laton Park
Overland Stockyard
Vidaurri - Adobe Hacienda
First Lutheran Church School
La Fuente Market Ii(Wa)
C And L Mini Mart And Cafe
Lone Oak Dairy #2
Kwra Mrf
Delta View School
Contaminants Found
A naturally occurring element that can cause cancer and other health effects at high levels.
Lead and copper testing requirement. Lead exposure can cause developmental harm in children.
At high levels, nitrate can cause blue baby syndrome in infants.
Annual water quality report delivery requirement.
Lead & Copper Levels
Lead (Pb)
Approaching limitSampled: Jan 2025
Copper (Cu)
Exceeds limitSampled: Jan 2025
How Does This Compare?
San Jose (93230) has more violations than 90% of US ZIP codes. The national average is 18.87 violations per ZIP over 5 years. This ZIP has 49.
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
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.