By Scott Lai
The photo to the right shows how much waste was collected from drain guards after just two weeks in storm drains in Southern California (via Ultra Tech International).It just goes to show how important drain guards are as a type of stormwater BMPs (Best Management Practices).
Drain guards, also known as witch's hats, are placed inside a drain and collects contaiminants from cars, silt, sediment, and oil from stormwater runoff. This prevents waste from entering our oceans.