Point source (PS) pollution comes from a specific source, such as industrial or sewage treatment plants. Nonpoint source pollution differs in that there is no specific source. It is an accumulation of both natural and manmade occurrences that are picked up by runoff. These can include fertilizer, oil and grease, sediment, bacteria and nutrients from livestock, and many others. NPS pollutants are a leading cause of water quality problems and they cannot be monitored and managed the way PS pollutants are through the Clean Water Act. Another layer of difficulty in managing NPS is the nature of urban (and suburban) Read More »