What is non-point source pollution?

Non-point source pollution refers to pollution that does not originate from a single, identifiable source but rather comes from multiple, diffuse sources across a wide area. This type of pollution is often a result of runoff from agricultural fields, urban areas, or other landscapes where various pollutants like nutrients, sediments, and chemicals are washed into water bodies by rainwater or melting snow.

This is distinct from point source pollution, which has a specific origin, such as a pipe discharging waste into a river. Non-point source pollution is more challenging to manage and regulate because its contributions can vary widely and are often cumulative, making it harder to pinpoint and control. The impacts of non-point source pollution can be significant, affecting water quality in lakes, rivers, and coastal waters, leading to issues like algal blooms and habitat degradation.