Water Quality in San Jose, CA (95928)
EPA violation data for public water systems serving ZIP code 95928.
Active Health Violations
9 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 82% of US ZIP codes.
Based on EPA compliance data. Not a substitute for an official water quality report from your utility.
37,409
Population
29
Water Systems
26
Violations (5yr)
9
Health-Based
Location
Loading map...
Water Systems Serving This Area (29)
Cal-Water Service Co.-Chico
South Feather W&P - Miners Ranch
Gridley Farm Labor Housing
All resolvedSierra Nevada Brewing Co.
Pg&E Rocky Point Cg
Almond Grove Mobile Park
1 health-basedSilver Dollar Fairgrounds
1 health-basedPg&E Haskins Valley Cg
Pg&E Ponderosa Flat Cg
Forest Ranch Charter School
1 health-basedSierra Moon Mutual Water Company
1 health-basedCsu Chico, University Farm
Dauterman Well
1 health-basedButte Creek Mhp
Truroots
1 health-basedCusd - Cohasset Elementary School
Jessys Door
Pg&E Cool Springs Cg
Pnf Sandy Point Day Use Area
Pnf Sundew / Hutchins Cgs
Pg&E Camp Conery Cg
Forest Knolls Mutual Water Co
2 health-basedHartley Mutual Water System
1 health-basedSunset Moulding Chico
Pg&E: Philbrook Dam
Cohasset Industrial Park
Usfs Oak Flat Water System
Pg&E Last Chance Cg
Llano Seco Rancho
All resolvedContaminants Found
Missed testing deadlines — not a detection of bacteria.
At high levels, nitrate can cause blue baby syndrome in infants.
Lead and copper testing requirement. Lead exposure can cause developmental harm in children.
Annual water quality report delivery requirement.
Lead & Copper Levels
Lead (Pb)
Within limitSampled: Jan 2023
How Does This Compare?
San Jose (95928) has more violations than 82% of US ZIP codes. The national average is 18.87 violations per ZIP over 5 years. This ZIP has 26.
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.