Water Quality in San Jose, CA (94021)
EPA violation data for public water systems serving ZIP code 94021.
No Health-Based Violations
None of the 13 water systems serving this ZIP have exceeded federal contaminant limits in the past 5 years. There is1 monitoring/reporting violation (missed testing deadlines), all resolved.
Better than 29% of US ZIP codes.
Based on EPA compliance data. Not a substitute for an official water quality report from your utility.
321
Population
13
Water Systems
1
Violations (5yr)
0
Health-Based
Location
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Water Systems Serving This Area (13)
City Of Daly City
California Water Service - San Mateo
City Of Redwood City
California Water Service-S San Francisco
California Water Service - Bear Gulch
City Of San Bruno
North Coast County Water Dist
Estero Municipal Improvement District
All resolvedCalifornia Water Service - San Carlos
City Of Burlingame
San Mateo County Memorial Park
Redwood Glen Camp & Conference Ctr
Loma Mar Mutual
Contaminants Found
Lead & Copper Levels
Lead (Pb)
Within limitSampled: Jan 2023
How Does This Compare?
San Jose (94021) has more violations than 29% of US ZIP codes. The national average is 18.87 violations per ZIP over 5 years. This ZIP has 1, most of which are monitoring/reporting issues.
Water Filter Recommendations
No contaminant issues detected. For general protection, a basic carbon filter removes common impurities like chlorine and sediment. Look for NSF/ANSI 42 certified products.