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Tap water quality report

PFAS in DC

Of the 3 water suppliers tested for PFAS in DC, 0 detected PFOA or PFOS (0%).

0%
of suppliers detected PFOA or PFOS
3
suppliers tested
DC rankings Lead in DC PFAS in DC

What is PFAS?

PFAS — “forever chemicals” — are synthetic compounds that accumulate in the body and are linked to cancer, liver damage and immune effects. In 2024 the EPA set enforceable limits of 4 parts per trillion each for PFOA and PFOS. These are the only nationwide PFAS measurements, from the EPA’s UCMR-5 program.

Water suppliers

PFAS value per supplier, 2023–2025. EPA limit — 4 ppt (0.004 µg/L) for PFOA and PFOS, set in 2024. Suppliers that detected PFOA or PFOS are highlighted and listed first. “Not detected” means the contaminant was measured but not found.
SupplierCityPopulationPFAS (ug/L)
D.C. Water and Sewer Authority Washington 632,323 Not detected
Joint Base Anacostia - Bolling Washington 19,312 Not detected
Naval Station Washington - Wny Washington Navy Yard 16,800 Not detected