Annual Water Quality Reports

DC Water's Annual Water Quality Report details the outstanding quality of your drinking water.  Our test results demonstrate that your drinking water surpasses the water quality standards established by the U.S. Environmental Protection Agency (EPA). In 2017, DC Water collected more than 6,500 water samples and conducted over 40,000 tests to ensure that high quality water reaches everyone in the District of Columbia.

2018 Annual Drinking Water Quality Report

2017 Annual Drinking Water Quality Report

Informe sobre la Calidad del Agua 2017

2016 Annual Drinking Water Quality Report

Water Quality Reports from Previous Years

The following report details the quality of the water provided by the Washington Aqueduct, the federally owned drinking water treatment plant that treats the drinking water in the District.

Washington Aqueduct Water Quality Report