Water & Hydrology


Learn more about water and hydrology in Loudoun County:

  • Floodplains - Floodplains, in addition to being important natural resource areas for water conveyance and wildlife, are regulated by the county to help protect life and property.
  • Stormwater - The quantity and quality of stormwater runoff in developed areas is controlled through design and construction of best management practices (BMPs) such as culverts, drainage swales, and stormwater ponds.
  • Water Resources Monitoring - In 2001, the county began developing a long-term program to monitor water resources in the county including precipitation, stream flow, groundwater levels, and water quality.
  • Watersheds - Watersheds are a logical and effective planning and management unit for water resources. A strategic approach was developed and specific recommendations made for a countywide watershed management plan.
  • Wetlands - Wetlands help store stormwater runoff and improve water quality by filtering sediment, nutrients, metals, and other pollutants.

Current & Recent Conditions

The Loudoun County Water Resources Monitoring Program provides current and recent hydrological conditions in our area.