Stormwater Management

Stormwater is the rain and melting snow that falls on our rooftops, streets, and sidewalks. As stormwater flows, it sweeps up pollutants such as oils, chemicals, sediments, pathogens and trash. Rather than being absorbed naturally into the ground, much of New York City’s stormwater eventually flows into storm drains or catch basins, and from there into the Sewer System.

We oversee a broad citywide effort to better manage stormwater to improve the health of our local waterways and prevent flooding. Learn more about our Green Infrastructure, Bluebelt, and Long Term Control Plan Programs, as well as what you can do to help Prevent Flooding and protect local waterways with the Safe Disposal of Harmful Products.

Stormwater Management System Design Guidelines

Guidelines for the Design & Construction of Stormwater Management Systems

The Guidelines for the Design and Construction of Stormwater Management Systems assists New York City's development community and licensed professionals in the selection, planning, design and construction of onsite source controls.

Standards for Stormwater Release Rates

The New York City Department of Environmental Protection (DEP) amended Chapter 31 of Title 15 of the Rules of the City of New York (RCNY), the existing rules governing house and site connections to the city’s sewer system (“existing rules”). The purpose of the rule amendment is to more stringently control the flow of stormwater runoff from development lots to the city’s sewer system.

Water and Sewer Forms

Visit Water & Sewer Forms for sewer connection forms and reference materials.

Southeast Queens

The Interactive Southeast Queens Project Map highlights projects that are in construction or have been completed as part of the City’s $1.9 billion effort to reduce flooding and upgrade infrastructure throughout Southeast Queens.