Storm drains are the metal grates and concrete boxes found on urban and suburban streets, often at corners and on the sides of curbs and gutters. They help prevent flooding by draining rainwater off of streets and other paved surfaces.
Is a Storm Drain System the same thing as a Sanitary Sewer System?
Sewer systems and storm drain systems are not the same. The water that goes down a sink or toilet in your home or business flows through a sewer system to a wastewater treatment plant where it is treated and cleaned. Water that flows down a driveway or street and into a gutter goes into a storm drain which goes directly to a natural body of water, untreated.