Guidelines for the Design and Construction of Stormwater Management Systems - Color Edition

DEP's stormwater performance standard is intended to reduce adverse impacts on the city's combined sewer system from runoff during rainstorms that are more severe than sewers and related facilities are designed to handle. When excessive stormwater enters the combined sewer system from impervious surfaces it can cause combined sewer overflows (CSOs) flooding and sewer backups. By slowing the flow of stormwater to the sewers the stormwater performance standard allows the city to manage stormwater runoff from new development and redevelopment more effectively and maximize to the greatest extent possible the capacity of the city's combined sewer systems.