Water Quality in Washington D.C., DC
Detailed water quality data for Washington D.C., District of Columbia including contaminant levels, EPA comparisons, AquaScore™ grading, and treatment recommendations.
Water utility: DC Water.
Water source: Potomac River.
Key Contaminants Found
- Total trihalomethanes (TTHMs)
- Haloacetic acids (HAA5)
- Chromium (hexavalent)
- Lead
- Chloroform
DC Water draws from the Potomac River and has invested in advanced treatment. However, the District's lead crisis in 2001-2004, when high lead levels affected thousands of homes, revealed the extent of lead service line issues.