Denitrifying bioreactors have the potential to reduce nitrogen loading to streams in agricultural watersheds. By passing the nitrate-rich waters of tile-drained fields through a system engineered for denitrification, the total nitrogen loading is reduced before entering sensitive aquatic ecosystems. In this project we found that intense summer storms impact nitrate removal rates in these reactors, causing in some cases for the removal rate to sharply drop for a period of time post-storm. Denitrifying bioreactors placed in existing tile-drained fields could reduce 4.5% of the total nitrogen export from the Upper Susquehanna River Basin. As a low-cost, low-maintenance strategy, denitrifying bioreactors can be expected to reduce agricultural impact on water resources. More research and design modifications are recommended to address performance during storm events.