Water Quality in San Jose, CA (93240)
EPA violation data for public water systems serving ZIP code 93240.
Active Health Violations
28 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 88% of US ZIP codes.
Based on EPA compliance data. Not a substitute for an official water quality report from your utility.
5,981
Population
19
Water Systems
44
Violations (5yr)
28
Health-Based
Location
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Water Systems Serving This Area (19)
Cws - Bakersfield
Bakersfield, City Of
Two (2) Jays
Kern Valley Moose Lodge #498
Kern Valley Mutual Water Company
2 health-basedOak Knolls Mutual Water Company
6 health-basedClark Street Community Well
1 health-basedKernvale Mutual Water Co
Hungry Gulch Mwc
17 health-basedFourth Street Water System
Paradise Cove Lodge
Cypress Canyon Water System
2 health-basedLake Isabella Motel & Trailer Park-Inac.
Daves Sports Bar
Paradise Mobilehome Park
Boulder Canyon Water Association
Cws Squirrel Mountain Water System
Isabella Mutual Water Company
Lakeside Water System
Contaminants Found
A naturally occurring element that can cause cancer and other health effects at high levels.
At high levels, nitrate can cause blue baby syndrome in infants.
Missed testing deadlines — not a detection of bacteria.
Annual water quality report delivery requirement.
Lead and copper testing requirement. Lead exposure can cause developmental harm in children.
Lead & Copper Levels
Lead (Pb)
Within limitSampled: Jan 2025
How Does This Compare?
San Jose (93240) has more violations than 88% of US ZIP codes. The national average is 18.87 violations per ZIP over 5 years. This ZIP has 44.
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.