Your Drinking Water Quality

Your Water Sources
Loudoun Water provides drinking water that meets all the standards required by the Safe Drinking Water Act, which is enforced by the Virginia Department of Health. 

For our Central System customers, drinking water comes from the Potomac River and Goose Creek. The Potomac River is augmented by reservoirs in Maryland, Virginia, and West Virginia through a shared supply agreement with neighboring water providers. Goose Creek receives water from Beaverdam Creek Reservoir and Goose Creek Reservoir. Beaverdam Creek Reservoir fills Goose Creek Reservoir when water levels get low and vice versa. Drinking water from the Potomac River is fully treated by Loudoun Water and/or by our wholesaler, Fairfax Water. 

Our Community System customers are served by freestanding water and wastewater systems whereby water is supplied by community well(s). Most Loudoun Water customers are served by the Central System.

Annual Water Quality Reports

2026 Central System Water Quality Report for year ending 2025 - Now Available!
2026 Community Systems Water Quality Report for year ending 2025 - Now Available!

Loudoun Water publishes annual consumer confidence water quality reports each year as a requirement under the Safe Drinking Water Act. These reports provide information about where your water comes from, what's added, how it is treated, tests that are performed, information on fluoride, and quality evaluation. Data for inorganic and metals parameters for Fairfax Water's source and treated waters for the Potomac River, Corbalis Water Treatment Plant is available on their website.

Information about Loudoun Water testing for lead in accordance with the EPA's Lead and Copper Rule can be found in the Water Quality Reports.

Customers receive notices with their bills by July 1 each year with a direct link to the current water quality report. If you have any questions or would like to request a printed copy, please call our Customer Relations team at 571-291-7880.

Su Calidad Del Agua