Doan Brooke is one of the five greater “bluestone” brooks found in the Cuyahoga County of Northeast Ohio. As the Doan Brook watershed was developed over the last 200 years, urbanization of Doan Brook and its watershed has harmed water quality in the brook in many ways altering the natural water/ air balance significantly.

According to EPA’s 2013 air pollution report, the Lake, Cuyahoga, and Lorain Counties have the highest emissions of directly emitted PM2.5 and/or PM2.5 precursors in the area up wind and contributes significantly to the violating monitors in Cleveland.Cuyahoga County has violating monitors and has been recommended as nonattainment by Ohio. Lake County emits the greatest amount of directly emitted PM2.5 and

precursors while the Eastlake Plant of the Cleveland Electric Illuminating company has the highest combined emissions of any source in the Cleveland area.