Improved Water Quality
The Northeast Ohio Regional Sewer District (NEORSD) performs water quality surveys along the Cuyahoga River to determine the relative health of the river. One metric, called the Modified Index of Well-Being (MIwb), measures fish community health in the river. This measure looks at the numbers, weight, and diversity of fish species at four different points on the river. Distances are measured in "river miles" along the river's length from its mouth on Lake Erie, indicated by “RM” on the graph. The MIwb scores have risen dramatically since 1990, indicating improving water quality conditions along the Cuyahoga River.
Data Source: NEORSD