Is Washington, District of Columbia tap water safe?
10 water systems report serving Washington. Your water depends on which one serves your address. Check your bill if unsure. This list is matched from the ZIP codes in this place, so it may include nearby systems.
A
DC Water
Serves 632,323 people · Surface water · Full report →
No health-based violations in the last 5 years; 4 monitoring/reporting violations; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2026).
C
Joint Base Anacostia - Bolling
Serves 20,411 people · Surface water · Full report →
2 health-based violations in the last 5 years; 25 monitoring/reporting violations; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2024).
D
Naval Station Washington - Wny
Serves 16,800 people · Surface water · Full report →
3 health-based violations in the last 5 years; 7 monitoring/reporting violations; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2023).
C
Wingate Elementary School (New) - Bie
Serves 800 people · Groundwater · Full report →
2 health-based violations in the last 5 years; 1 monitoring/reporting violation; 2 not yet resolved; No UCMR 5 PFAS results on file; Lead 90th percentile below the action level (2025).
D
Fort Wingate Community
Serves 550 people · Groundwater · Full report →
5 health-based violations in the last 5 years; 1 monitoring/reporting violation; 5 not yet resolved; No UCMR 5 PFAS results on file; Lead 90th percentile below the action level (2025).
D
Eastern Navajo Agency - Bie
Serves 455 people · Groundwater · Full report →
6 health-based violations in the last 5 years; 8 monitoring/reporting violations; 5 not yet resolved; No UCMR 5 PFAS results on file; Lead 90th percentile below the action level (2023).
A
Bie Chemawa Indian School
Serves 320 people · Groundwater · Full report →
No health-based violations in the last 5 years; 4 monitoring/reporting violations; No UCMR 5 PFAS results on file; Lead 90th percentile below the action level (2025).
C
Dibe Yazhi Habitiin (Borrego Pass) Day School-Bie
Serves 120 people · Groundwater · Full report →
3 health-based violations in the last 5 years; 2 monitoring/reporting violations; 4 not yet resolved; No UCMR 5 PFAS results on file; Lead 90th percentile below the action level (2025).
C
Hanaadli Huerfano Boarding School - Bie
Serves 65 people · Surface water · Full report →
1 health-based violation in the last 5 years; 10 monitoring/reporting violations; 2 not yet resolved; No UCMR 5 PFAS results on file; Lead 90th percentile below the action level (2025).
A
Washington Aqueduct Division.
Population not reported (often a wholesaler) · Surface water · Full report →
No health-based violations in the last 5 years; No UCMR 5 PFAS results on file; Latest lead 90th percentile on file is from 1992 (older than 5 years, not graded).