What is the main purpose of controlling stormwater at its source?

The main purpose of controlling stormwater at its source is to reduce treatment costs downstream. By managing stormwater where it originates, such as through techniques like green roofs, permeable pavement, or retention basins, the volume and rate of runoff can be significantly minimized. This approach alleviates the burden on municipal stormwater systems and treatment facilities, leading to lower maintenance and operational costs.

Controlling stormwater at its source also helps to prevent pollution and manage water quality more effectively before it enters larger systems or water bodies, ultimately benefiting the entire watershed. It is a proactive strategy that enhances sustainability and minimizes the need for expensive treatments further along in the water management process.