Stormwater runoff is a major cause of water pollution in urban areas. When rain falls on our roofs, driveways, roads and parking lots, it’s not able to soak into the ground as it would in a natural area. Instead it enters storm drains, ditches and canals, where it drains, untreated, into nearby water bodies like the IRL. Stormwater runoff is a problem because it carries excess fertilizers, household chemicals, dirt, trash, plants, pet waste, heavy metals, and other pollutants. When these materials are released into coastal waters, they cause muck deposits and fuel algae blooms and fish kills.