Name one common type of pollutant found in stormwater runoff.

• A. Plastic waste
• B. Heavy metals
• C. Sediment
• D. Greenhouse gases

Answer: (C)

Sediment is a common type of pollutant found in stormwater runoff because it comprises soil particles, organic matter, and other debris that can be easily washed away during rain events. When precipitation occurs, these particulates can flow over land surfaces and into stormwater systems, impacting water quality in rivers, lakes, and oceans.

The presence of sediment in stormwater runoff is significant as it can cause several issues. For instance, excess sediment can lead to increased turbidity in water bodies, which can harm aquatic ecosystems by reducing light penetration necessary for plant growth and disrupting the habitats of organisms. Additionally, sediment can transport other pollutants, such as nutrients and heavy metals, which may adhere to soil particles, exacerbating water quality issues.

In contrast, while plastic waste and heavy metals are also important pollutants, they are less prevalent in stormwater compared to sediment. Greenhouse gases, on the other hand, are not typically a direct pollutant in stormwater runoff; they are more associated with emissions from vehicles and industrial activities rather than being transported via stormwater systems. Therefore, recognizing sediment as a key pollutant highlights its critical role in stormwater management and the need for effective erosion control practices.