Sewershed NCM-037 · NYC DEP Combined Sewer Overflow Tributary Area
NCM-037 - Midtown, Manhattan
Properties in this area share the NCM-037 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 Midtown, Manhattan specifically.
NCM-037 is a combined sewer area covering 385 properties in Midtown, Manhattan. Flood Form rates 54% of them Moderate or High for stormwater exposure, and 37% for groundwater. 32% of lots have yard area that legally qualifies for on-site infiltration. Ground elevation is typically 64 ft. The median building dates to 1925. 19% of parcels sit over a historic stream or pond. According to NYC DEP green infrastructure records, this sewershed drains to East River / Open Waters. NYC DEP has built 5 green infrastructure assets here.
385
Properties in sewershed
31.7%
Legally eligible for on-site infiltration
54%
Stormwater exposure: Moderate or High
37%
Groundwater exposure: Moderate or High
What sets NCM-037 apart
64 ft
Median ground elevation
96%
Average impervious cover per lot
1925
Median year built
19%
Properties over a historic stream or pond
Stats computed from Flood Form’s NYC parcel data as of October 9, 2026
Common solutions for Midtown properties
Downspout Diversion
Redirects roof runoff away from the combined sewer and into landscaped or permeable areas on the lot.
Infiltration System
Drywells or infiltration chambers that let stormwater soak into the ground on-site instead of entering the sewer.
Detention System
Holds stormwater temporarily and releases it slowly, reducing peak flow into the combined sewer during a storm.
Drain Improvement
Upgrades yard, area, or foundation drains so water is carried away from the building instead of pooling.
Foundation Waterproofing
Protects the foundation from groundwater intrusion, relevant where groundwater exposure runs high.
Nearby sewersheds
- NC-017Murray Hill105 properties · 61% with Moderate or High stormwater exposure
- NCM-038Murray Hill118 properties · 80% with Moderate or High stormwater exposure
- NCM-041Murray Hill765 properties · 46% with Moderate or High stormwater exposure
- NCM-045Midtown South483 properties · 50% with Moderate or High stormwater exposure
- NR-027Chelsea867 properties · 58% with Moderate or High stormwater exposure
- NCM-034Turtle Bay131 properties · 66% with Moderate or High stormwater exposure
Want to see where your specific property stands?
Get Your Property’s Flood Form