Sewershed WI-003  ·  NYC DEP Combined Sewer Overflow Tributary Area

WI-003 - Lenox Hill, Manhattan

Properties in this area share the WI-003 combined sewer — during moderate-to-heavy rain, runoff can exceed pipe capacity faster than it drains, which is what drives sewer backup exposure block by block. Here’s what that looks like for Lenox Hill, Manhattan specifically.

WI-003 is a combined sewer area covering 1,428 properties in Lenox Hill, Manhattan. Flood Form rates 55% of them Moderate or High for stormwater exposure, and 36% for groundwater. 58% of lots have yard area that legally qualifies for on-site infiltration. Ground elevation is typically 54 ft. The median building dates to 1910. 46% of parcels sit over a historic stream or pond.