STATE / TERRITORY LEDGER
District of Columbia drinking water system records
EPA’s September 2026 export lists 3 active community water systems in District of Columbia, with 1 current-violation flags and 1 serious-violator flags among covered systems serving at least 2,500 people.
Source: EPA SDWIS system-search export · Active community systems · Snapshot 13 Sep 2026
01 / LARGEST SYSTEMS
District of Columbia community water systems
EPA’s covered District of Columbia records include 3 active community systems reporting a combined population-served total of 668,435, which may overlap.
Population served is a system-reported service figure. It is not a count of unique state residents.
| Water system | Population served | Primary source | Current export status |
|---|---|---|---|
| D.C. Water And Sewer AuthorityDC0000002 | 632,323 | Surface water purchased | No current violation flagged |
| Joint Base Anacostia - BollingDC0000004 | 19,312 | Surface water purchased | Current serious-violator flag |
| Naval Station Washington - WnyDC0000003 | 16,800 | Surface water purchased | No current violation flagged |
02 / CITY REPORTS
District of Columbia city water-system reports
District of Columbia has 0 city reports meeting the publication threshold for covered systems or reported population served.
No qualifying city reports.
03 / COUNTY REPORTS
District of Columbia county water-system reports
District of Columbia has 1 county reports meeting the publication threshold for covered systems or reported population served.