What is one common misconception about stormwater pollution?

Many people incorrectly believe that stormwater pollution only occurs during heavy rain events. This misconception overlooks the fact that stormwater pollution can happen during a variety of weather conditions, including light rain and even when the ground is dry. Urban surfaces like roads, parking lots, and rooftops can generate runoff from fairly light precipitation, picking up pollutants such as oil, debris, and chemicals along the way.

Understanding that stormwater pollution can occur any time there is rain, no matter the intensity, is vital for effective stormwater management. This recognition helps in implementing better practices for controlling runoff and reducing pollution throughout entire stormwater systems, not just during storms deemed 'heavy' by precipitation standards. Underestimating the potential for pollution during lighter rain events can lead to insufficient measures being taken to protect waterways and urban environments from contamination.