Fertilizers and Pesticides
Fertilizers and pesticides are among the many common stormwater pollutants that can degrade water quality. Fertilizers contain nutrients, such as phosphorus and nitrogen, that are good for lawns and plants when used properly, but excessive amounts applied to landscapes wash off and pollute streams.
Pesticides are substances, some of which are natural and some manmade, that are used to kill or repel pests such as insects, weeds, rodents, and molds. When used excessively or improperly, pesticides can end up in streams, just like many other pollutants, and are harmful to water quality and aquatic life.
Fertilizers and pesticides are used in many different applications, most commonly in residential and commercial landscaping as well as for agricultural purposes.