Water Programs & Services

Loudoun County develops and implements several water programs that support the Clean Waters Initiative including the stormwater management program and water and wastewater projects. 


  • Stormwater Management - This countywide program addresses the design, development, improvement, operation, inspection, maintenance, and oversight of the stormwater management system.
  • Water and Wastewater Programs - Oversees the county's water and wastewater community assistance projects. 

Clean Waters Initiative

Loudoun County is part of the Chesapeake Bay Watershed (CBW). There are 17 smaller watersheds in Loudoun County (view map), each draining to a local river or stream that is part of the CBW.

The Chesapeake Bay Watershed includes portions of six different states - Delaware, Maryland, New York, Pennsylvania, Virginia and West Virginia - and the District of Columbia. The watershed spans more than 64,000 square miles, and is home to almost 18 million people. The Susquehanna, Potomac, York, James, and Rappahannock rivers are the five largest in the CBW. In total, more than 100,000 streams, creeks, and rivers are in the CBW.

Clean water is essential to building and sustaining healthy communities. Surface water and groundwater are critical to the economic and environmental health of Loudoun County. We rely on abundant supplies of clean, safe water for drinking, agriculture, industry, and recreation, as well as to support the natural ecosystems. It is important that we take care of our local waters and the Chesapeake Bay by limiting the amount of pollution we produce. Excess nutrients and sediments have been found to negatively affect the quality of our local waters, rivers, and ultimately, the Chesapeake Bay.