Water Quality in Concord, CA (94520)
EPA violation data for public water systems serving ZIP code 94520.
Active Health Violations
1 health-based violation 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 62% of US ZIP codes.
Based on EPA compliance data. Not a substitute for an official water quality report from your utility.
37,381
Population
25
Water Systems
8
Violations (5yr)
1
Health-Based
Location
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Water Systems Serving This Area (25)
Contra Costa Water District
City Of Antioch
Brentwood
City Of Pittsburg
Naval Weapons Station
River Ranch Mobile Home Park
1 health-basedMapache Trailer Park
Los Vaqueros Marina Bldg
Concord Sportsmen S Club
Black Butte Mobile H.P.
All resolvedWillow Pass Mobile Home *Cl 1/07-Inactiv
Lockeford Mobile Home Park Wtr Sys
Pg&E - Psea Camp Pit
United Sportsman - Inactive
Psea Camp - Desabla
Dunrovin Mobile Home Village
North Side Mobile Home Ranch
Willow Pass Bussiness Park Water System
Psea Camp Almanor
Pg&E - Psea Camp Britton
Pg&E - Psea Camp Shasta
Knott S Auto Court
Los Vaqueros Interpretive Center
Randall-Bold Water Treatment Plant
Ccwd/Brentwood Wtp
Contaminants Found
Lead and copper testing requirement. Lead exposure can cause developmental harm in children.
Missed testing deadlines — not a detection of bacteria.
Lead & Copper Levels
Lead (Pb)
Within limitSampled: Jan 2025
How Does This Compare?
Concord (94520) has more violations than 62% of US ZIP codes. The national average is 18.87 violations per ZIP over 5 years. This ZIP has 8.
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
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.