Flood risk map for Brooklyn’s 44th District

Welcome! We have some useful flooding information for you here.

Here is a map of Brooklyn’s 44th Assembly District showing both stormwater and groundwater risk areas by location.

[Note: coastal flooding is not as relevant for this specific area, however coastal surge can cause sewer backup which can affect the entire city system.]

More information

• This map was created by Field Form, a local design and build landscaping firm with added expertise in outdoor drainage and flood mitigation solutions.

• More on Field Form, including interactive maps, click here:

• The City Sponge has more flooding info and tips:

  • More maps and good sources

  • Flood Insurance Q&A

  • Porous pavement test in Brooklyn

  • Solutions stories

  • The City Sponge home page and search bar

• State Rep Bobby Carroll has been active on flooding solutions, notably:

  • Right To Know Flooding Disclosure Laws

  • Proposed Tax Abatement for Flood Mitigation Work: Basic gist: it provides a green infrastructure tax abatement for the construction of green infrastructure projects on certain properties in a city of one million or more.

  • Bobby Carroll home page

Quick facts on Stormwater

Q: How much rain water collects in a 1 inch storm?

• Multiply your property size x 0.56 to calculate your total water potential per 1 inch of rain

• Example: an 18x50 foot townhouse can have ~504 gallons of water coming off the roof in 1 inch of rain

• Greywater Action

• Related story on Rain Barrels in The City Sponge

Q: How often does it rain more than 1 inch in NYC?

• About 40 times a year, according to the Gowanus Canal Conservancy (GCC), an organization at the forefront of policy, infrastructure projects, and climate justice for people who work and live in the South Brooklyn area.

Q: What is the capacity of the NYC sewer and how much can it handle?

• About 1.5” per hour, though it varies by neighborhood.

• NYC sewers were not built to handle the capacity of water now projected in a “sub tropical climate”…which is what NYC is now officially considered by NOAA. They are being upgraded but it is expensive and slow.

• While 1.5 inches may not sound like a lot….but it can be much more than that in low-land areas with runoff.

» Looking for more NYC flooding facts, go here

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