Columbia, MD water quality
Columbia, MD is served by 9 public water systems, serving 288,529 people combined. Across those systems, we count 1 health-based violation in the last 5 years. The worst Tap Grade among them is A.
Water systems serving Columbia
HOWARD COUNTY D.P.W. DISTRIBUTION
COLUMBIA, MD · 286,158 served
GLENWOOD LIBRARY
COLUMBIA, MD · 671 served
NEW HOPE 7TH-DAY ADVENTIST CHURCH
MDLTON, MD · 558 served
GLENWOOD COMMUNITY CENTER
COLUMBIA, MD · 366 served
WEST HOWARD SWIM CLUB
COLUMBIA, MD · 220 served
SILVER HILL MANUF HOME COMM. (SC4060019)
POTOMAC, MD · 180 served
WESTERN REGIONAL PARK PAVILION WELL
COLUMBIA, MD · 150 served
WESTERN REGIONAL PARK
COLUMBIA, MD · 150 served
LISBON VOLUNTEER FIRE DEPARTMENT
COLUMBIA, MD · 76 served
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Is Columbia, MD tap water safe to drink?
9 public water systems serve Columbia, MD, with 1 health-based violation in the last 5 years across them. The worst Tap Grade among them is A.
Does Columbia's water have lead in it?
The most recent 90th-percentile lead sample is 3 ppb, versus the EPA action level of 15 ppb.
Has PFAS been detected in Columbia's water?
These systems were tested under UCMR5 and no PFAS was detected above the reporting limit in the analytes we track.
Source: EPA SDWIS/ECHO · Data as of 2026Q2