EVERYDAY SCIENCE

Detailed explanation-1: -Rainfall or snowmelt flowing over and through the field causes NPS emissions. Excess fertilizers, herbicides, and insecticides from farm lands and residential areas are examples of nonpoint source contamination.

Detailed explanation-2: -Nonpoint source pollution comes from oil, pet waste, pesticide, herbicide, fertilizer, road salt, bacteria, sediment, and any other contaminant that ends up on the ground naturally or from human activity.

Detailed explanation-3: -Road salt is considered a nonpoint source of pollution because it can be challenging to trace back to one specific source.

Detailed explanation-4: -Point-source pollution is easy to identify. As the name suggests, it comes from a single place. Nonpoint-source pollution is harder to identify and harder to address. It is pollution that comes from many places, all at once.

Detailed explanation-5: -Nonpoint Source Pollution is transported by the storm water system or other surface water flows to local streams and bays. In contrast, a particular ongoing discharge from a wastewater plant or industrial facility is considered a “point source” of water pollution.