Have you ever wondered where all the water goes when it rains or after the snow melts? Some of it seeps into the ground or evaporates, but much of it runs off over the land, down streets and into a storm drainage system. This runoff water is called stormwater.
The Department of Public Works manages the City's Municipal Separate Storm Sewer System (MS4). This system, also known as the drainage system, includes about 65 miles of drainage pipe connecting 8,000 catch basins (also called drains) and 2,000 drainage manholes.
The City is authorized to discharge stormwater through the The U.S. Environmental Protection Agency (EPA) oversees the NPDES Phase II permitting program. In order to comply with the program, the City must follow six Minimum Control Measures, which are implemented through a series of Best Management Practices (BMPs):