District of Columbia tap water, by utility.
3 utilities with a full report, serving 668,435 people as they report it. Regulated PFAS turned up at 0 of them.
All 3, by people served
| Utility | Based in | Serves | Regulated PFAS | Health-based violations since 2016 |
|---|---|---|---|---|
| D.C. Water and Sewer Authority | Washington | 632,323 | None found | 0 |
| Joint Base Anacostia - Bolling | Washington | 19,312 | None found | 5 |
| Naval Station Washington - Wny | Washington Navy Yard | 16,800 | None found | 4 |
Utilities EPA sampled under UCMR 5, plus any other community system serving 3,300 people or more. Smaller systems appear in ZIP code results. People served is what each utility reports to EPA. Data: EPA SDWIS 2026 Q2 and UCMR 5.
Where to go next
Read your utility’s own report
It lists nitrate, arsenic and byproduct levels that federal data does not carry.
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