Concord, CA water quality
Concord, CA is served by 6 public water systems, serving 198,266 people combined. Across those systems, we count 0 health-based violations in the last 5 years. The worst Tap Grade among them is A.
Water systems serving Concord
CONTRA COSTA WATER DISTRICT
CONCORD, CA · 198,000 served
LOS VAQUEROS MARINA BLDG
CONCORD, CA · 180 served
WILLOW PASS BUSSINESS PARK WATER SYSTEM
CONCORD, CA · 60 served
LOS VAQUEROS INTERPRETIVE CENTER
CONCORD, CA · 25 served
RANDALL-BOLD WATER TREATMENT PLANT
CONCORD, CA · 1 served
CCWD/BRENTWOOD WTP
CONCORD, CA · 0 served
Get alerted when Concord's water gets a violation
We'll only email you about this water system. Unsubscribe anytime.
Worried about what's in your tap?
See which water filters are certified to remove the contaminants found in your area.
Find a filter that matches your waterFrequently asked questions
Is Concord, CA tap water safe to drink?
6 public water systems serve Concord, CA, with 0 health-based violations in the last 5 years across them. The worst Tap Grade among them is A.
Does Concord's water have lead in it?
The most recent 90th-percentile lead sample is 3.1 ppb, versus the EPA action level of 15 ppb.
Has PFAS been detected in Concord's water?
These systems were tested under UCMR5 and no PFAS was detected above the reporting limit in the analytes we track.
Other cities in California
See all of California →Source: EPA SDWIS/ECHO · Data as of 2026Q2