Nonpoint Source Pollution
What is Nonpoint Source Pollution?
Nonpoint source (NPS) pollution comes from many different sources across a landscape. NPS pollution occurs when rainfall or snowmelt runs over and through the ground. This runoff picks up natural and human-made pollutants as it moves downhill into waterways. Unlike water pollution from factories and sewage treatment plants, NPS pollution is difficult to trace because it can combine with other sources before entering rivers, lakes, and wetlands.