Water Quality in San Jose, CA (93940)
EPA violation data for public water systems serving ZIP code 93940.
Active Health Violations
2 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 68% of US ZIP codes.
Based on EPA compliance data. Not a substitute for an official water quality report from your utility.
30,605
Population
25
Water Systems
11
Violations (5yr)
2
Health-Based
Location
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Water Systems Serving This Area (25)
Cwsc Salinas
Cal Am Water Company - Monterey
Alco Water Service
Marina Coast Water District
Csp-Andrew Molera State Reserve
Carmel Valley
Csp-J.P. Burns Park
Csp-Pfeiffer Big Sur
All resolvedCsp-Limekiln
Bishop Water Company
Merrill Gardens Iris Canyon Ws
Kirk Creek Campground
Garrapata Water System
Lucia Fountain
Big Redwood Fountain
Aera Energy Llc Ws
The Willows Resort
2 health-basedPalo Colorado Association
Corral De Tierra Road
Garland Park
Rocky Creek Water Company
Unitarian Church Water System
Antelope Cdf Station
Monterra Ranch Mws - Inactive
Csp-Pt. Sur Naval Station
Contaminants Found
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: Jul 2025
How Does This Compare?
San Jose (93940) has more violations than 68% of US ZIP codes. The national average is 18.87 violations per ZIP over 5 years. This ZIP has 11.
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.