Washington, DC water quality
Washington, DC is served by 14 public water systems, serving 654,856 people combined. Across those systems, we count 27 health-based violations in the last 5 years. The worst Tap Grade among them is F.
Water systems serving Washington
D.C. WATER AND SEWER AUTHORITY
WASHINGTON, DC · 632,323 served
JOINT BASE ANACOSTIA - BOLLING
WASHINGTON, DC · 19,312 served
Wingate Elementary School (New) - BIE
Washington, DC · 800 served
Fort Wingate Community
Washington, DC · 550 served
Eastern Navajo Agency - BIE
Washington, DC · 455 served
Baca (Dlo-ay Ashi) Community School - BIE
Washington, DC · 424 served
BIE CHEMAWA INDIAN SCHOOL
WASHINGTON, DC · 320 served
WA HE LUT INDIAN SCHOOL
WASHINGTON, DC · 175 served
Chi Chil Tah Jones Ranch Community School - BIE
Washington, DC · 137 served
Dibe Yazhi Habitiin (Borrego Pass) Day School-BIE
Washington, DC · 120 served
Bread Springs Day School (New) - BIE
Washington, DC · 115 served
Hanaadli Huerfano Boarding School - BIE
Washington, DC · 65 served
Lake Valley Navajo School - BIE
Washington, DC · 60 served
WASHINGTON AQUEDUCT DIVISION.
WASHINGTON, DC · 0 served
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Is Washington, DC tap water safe to drink?
14 public water systems serve Washington, DC, with 27 health-based violations in the last 5 years across them. The worst Tap Grade among them is F. A Tap Grade summarizes public EPA compliance records; it is not a determination that water is safe or unsafe to drink.
Does Washington's water have lead in it?
The most recent 90th-percentile lead sample is 39 ppb, versus the EPA action level of 15 ppb.
Has PFAS been detected in Washington'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
TapGraded presents public EPA data for information only — it is not health advice and not a determination that any water is safe or unsafe to drink. For health concerns, contact your water utility or local health department.