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).
Over the course of the year, our water monitoring program tested more than 40,000 samples taken from a variety of sources across the District – more than required – to ensure that the water we deliver to local homes and businesses is clean and reliable.
2025 Annual Drinking Water Quality Report
2024 Annual Drinking Water Quality Report
2023 Annual Drinking Water Quality Report
2022 Annual Drinking Water Quality Report
2021 Annual Drinking Water Quality Report
2020 Annual Drinking Water Quality Report
2019 Annual Drinking Water Quality Report
2018 Annual Drinking Water Quality Report
Informe sobre la Calidad del Agua 2018
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.
