What are the main pollutants associated with stormwater runoff?

The main pollutants associated with stormwater runoff include sediments, nutrients, heavy metals, and bacteria due to their significant impact on water quality and aquatic ecosystems.

Sediments commonly originate from disturbed soils and construction sites, which can smother aquatic habitats and hinder photosynthesis in plants. Nutrients, particularly nitrogen and phosphorus, often come from fertilizers and can lead to algal blooms that deplete oxygen in water bodies, harming fish and other aquatic organisms. Heavy metals, such as lead and copper, are frequently found in urban runoff from vehicles and building materials, posing toxicity risks to both humans and wildlife. Lastly, bacteria from animal waste and other sources can contaminate water, threatening public health and environmental quality.

Understanding these pollutants is crucial for implementing effective erosion and sedimentation control practices that mitigate their impacts on the environment.