State

District of Columbia: drinking water records

EPA lists 4 community water systems serving homes in District of Columbia. 3 took part in EPA's national PFAS survey (UCMR 5), and 3 found at least one PFAS above the level laboratories can measure.

In focus4community water systems

Public records. Clearer context.

Data as of EPA UCMR 5 final release, August 2026 (file dated Aug 28, 2026) · EPA SDWIS 2026Q2 (file dated Jul 9, 2026). How we build these pages

ZIP reports published

community water systems

systems with a health-based violation since 2016

systems that reached the lead action level since 2016

PFAS in EPA’s final survey

3 District of Columbia systems were in EPA’s national PFAS survey (UCMR 5); 3 found at least one PFAS, and 0 had a PFOA or PFOS yearly average at or above EPA’s limit. Open a county below to see each system’s results.

Counties

District of Columbia 4 systems

ZIP reports

Beyond the District of Columbia overview

Pick a county. Then read the records.

PFASReading PFAS survey resultsWhat a detection, a reporting level and a yearly average mean in EPA’s survey.LeadLead in drinking waterHow EPA’s lead records work and what the action level means for your home’s pipes.Your utilityFind your annual water reportConfirm the supplier on your bill, then read its Consumer Confidence Report for local results.

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Sources

EPA UCMR 5 occurrence data, samples collected 2023-01-03 – 2026-06-17, final release, August 2026 (file dated Aug 28, 2026); EPA SDWIS via ECHO, 2026Q2 extract (file dated Jul 9, 2026); EPA service-area boundaries v3.0; Census 2020 ZCTAs. Database prepared 2026-09-03.

PFAS in EPA’s final survey

Counties

ZIP reports

Pick a county. Then read the records.

Sources

Every record tellspart of the story.

Every record tells
part of the story.