When the rain falls, it hits the roof tops, driveways, sidewalks, parking lots, roads and other hard surfaces within our community. These hard surfaces, unlike lawns, forest and natural areas, do not absorb any of the water, and it becomes runoff. The more intense the rain, the more runoff is produced. Left on its own, this runoff can flood streets and homes, put public safety at risk, damage private and public property, and cause harm to the environment.