What does "non-point source pollution" refer to?

Non-point source pollution refers to pollution that comes from multiple, diffuse sources rather than a single point. This type of pollution does not have a specific, identifiable origin, making it more challenging to manage and regulate compared to point source pollution, which can be traced back to a defined outlet, like a pipe or factory.

Non-point source pollution often results from rainfall or snowmelt moving over and through the ground, picking up various pollutants along the way, such as fertilizers, pesticides, waste products, and sediments. Because it is widespread and can be influenced by many activities across large areas, controlling non-point source pollution typically requires a coordinated approach that includes land management practices, community efforts, and regulatory measures rather than targeting a single source.