What is urban runoff?

Urban runoff refers to the rainwater that flows over impervious surfaces in urban areas, such as roads, parking lots, and roofs. As the rainwater collects and moves, it picks up various pollutants like oils, heavy metals, chemicals, and sediments from these surfaces. This process transforms otherwise clean rainwater into a potential source of pollution when it enters drainage systems or local water bodies.

The phenomenon of urban runoff is significant because it can lead to water quality issues in streams, rivers, and lakes, ultimately impacting aquatic ecosystems and human health. It's crucial for urban planning and water management strategies to address this issue to mitigate pollution and protect water quality. Understanding urban runoff is essential for effective community water and waste management practices, emphasizing the need for appropriate measures like green infrastructure and stormwater management systems to capture and treat this runoff before it reaches natural water bodies.