Types of Nonpoint Source Polution
Toxic substances are chemicals that cause human and wildlife health problems. They include organic and inorganic chemicals and metals, pesticides, formaldehydes, household chemicals, gasoline, motor oil, battery acid, and roadway salt. City streets and other impervious surfaces accumulate NPS pollutants such as motor oil, gasoline and antifreeze. Because these surfaces do not absorb rainwater, runoff from urban areas is nine times greater than that from forestland.
