Water Quality in San Jose, CA (93308)
EPA violation data for public water systems serving ZIP code 93308.
Active Health Violations
18 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.
55,078
Population
50
Water Systems
26
Violations (5yr)
18
Health-Based
Location
Loading map...
Water Systems Serving This Area (50)
Cws - Bakersfield
Bakersfield, City Of
Oildale Mwc
5 health-basedLerdo Sheriff S Facility
Kern Valley Airport
Mountain Mesa Wc
Riverdale Village
1 health-basedChevron San Joaquin
El Taco Loco
Sun Pacific Shippers - Delano
1 health-basedNorth Kern Golf Course
Mobil Chemical
Pool California Energy Serv-Rosedale
Kern County Gun Club
Califia Farms Water System
All resolvedSun Pacific Shippers-Lerdo
Chevron-Texaco G & W Water System
Wildland Training Center
Sun Pacific Shippers-Maricopa Water Sys.
1 health-basedBurtch Construction
Uplands Of The Kern Mutual Water Company
Chevrontexaco-Monte Cristo
Ranchos Del Rio
1 health-basedTeen Challenge, Inc.
Gcg Water System
1 health-basedSpear Creek Cabin Owners Assoc
Poolwell Services - James Road
Round Mountain Water Company
8 health-basedWater Well Fund
Weatherford U.S., L.P.
All resolvedChevron Usa - Qic Facility
Choctaw Valley Mutual Water Co.
Caza Drilling California Inc
Old Corral Cafe
Riverview Homeowners Association
Paramount Farming - Lerdo Hwy Facility
Meadows Of The Kern Mutual Water Company
All resolvedWestside Industrial Center
Paramount Farming Co
Blm San Joaquin River Gorge
All resolvedRancho Rio Equestrian Center
Rio Mesa Mutual Water Company
Circus Liquors Water System
Darline'S Country Corner
Melton Drilling Co.
Arvin Labor Center Water System
North Shafter Farm Labor Center
Kern County Water Agency
Lakeside Mobile Villa Water
Airport Mutual Water System
Contaminants 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.
Lead & Copper Levels
Lead (Pb)
Within limitSampled: Jan 2025
How Does This Compare?
San Jose (93308) 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
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
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.