Bioreactors: Removing Excess Nitrogen Near the Source

High levels of nitrogen have been running into the North River and from the Smith Creek Headwater Spring into the watershed. High nitrogen levels promote the growth of algae and some types of aquatic plants. These growths quickly use up the oxygen levels in the water and block sunlight from reaching the water column. Restoring the natural balance of the watershed requires lowering nitrogen inputs to normal levels.

By constructing bioreactors near the source of the excess nitrogen before it flows downstream, the watershed is protected from these detrimental effects. Bioreactors work using natural materials and processes and are highly effective at promoting removal of nitrogen from the water.

The new bioreactor Ridge to Reefs constructed in partnership with the Harrisonburg Department of Public Works and the construction underway at the Yancey Farm will remove thousands of tons of nitrogen annually from Harrisonburg watersheds. Restoring the balance of the nitrogen load from these tributaries supports the health and function of the entire watershed ecosystem.