08/21/2026
π What are Beneficial Use Impairments (BUIs)?
The Niagara River is one of the Great Lakes' Areas of Concern, and BUIs help us measure the river's environmental health and track restoration progress.
When pollution or environmental changes affect how we use or enjoy a waterway, a Beneficial Use Impairment is identified. There are 14 possible BUIs used across Great Lakes Areas of Concern.
In 1993, the Canadian side of the Niagara River was assessed and 10 BUIs were ultimately found to be impaired. Since then, decades of restoration work, habitat improvements, monitoring, and collaboration have helped restore 7 of those impairments.
Today, only 3 impaired BUIs remain.
Every restored BUI is an important step toward a healthier Niagara River for people, fish, wildlife, and future generations.
Learn more at https://niagarariver.ca/