What is identified as the most common source of pollution in the Kalamazoo River?

The most common source of pollution in the Kalamazoo River is identified as a non-point source. Non-point source pollution refers to contaminants that come from multiple diffuse sources rather than a single, identifiable location. This type of pollution is often associated with rainfall and snowmelt, which can carry a variety of pollutants from agricultural areas, urban runoff, and natural landscapes into waterways.

While point source pollution comes from specific, identifiable sources such as pipes or industrial facilities, non-point sources are much more challenging to manage because they are widespread and vary in their impact based on land use practices and weather conditions.

Agricultural runoff is a particular type of non-point source pollution that contributes to the overall problem as it can introduce pesticides, fertilizers, and other chemicals into the river. Atmospheric pollution can also impact water quality but is less directly connected to the land around the river.

Understanding that non-point sources are the most common type of pollution helps highlight the need for watershed management practices aimed at reducing runoff and improving water quality in the Kalamazoo River.