Sewershed NC-017 · NYC DEP Combined Sewer Overflow Tributary Area
NC-017 - Murray Hill, Manhattan
Properties in this area share the NC-017 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 Murray Hill, Manhattan specifically.
NC-017 is a combined sewer area covering 105 properties in Murray Hill, Manhattan. Flood Form rates 61% of them Moderate or High for stormwater exposure, and 17% for groundwater. 36% of lots have yard area that legally qualifies for on-site infiltration. Ground elevation is typically 48 ft. The median building dates to 1930. 36% of parcels sit over a historic stream or pond.
105
Properties in sewershed
36.2%
Legally eligible for on-site infiltration
61%
Stormwater exposure: Moderate or High
17%
Groundwater exposure: Moderate or High
What sets NC-017 apart
48 ft
Median ground elevation
97%
Average impervious cover per lot
1930
Median year built
36%
Properties over a historic stream or pond
Stats computed from Flood Form’s NYC parcel data as of October 9, 2026
Common solutions for Murray Hill 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
- NCM-038Murray Hill118 properties · 80% with Moderate or High stormwater exposure
- NCM-037Midtown385 properties · 54% with Moderate or High stormwater exposure
- NCM-034Turtle Bay131 properties · 66% with Moderate or High stormwater exposure
- NCM-041Murray Hill765 properties · 46% with Moderate or High stormwater exposure
- NCM-036Upper East Side1,944 properties · 56% with Moderate or High stormwater exposure
- NCM-045Midtown South483 properties · 50% with Moderate or High stormwater exposure
Want to see where your specific property stands?
Get Your Property’s Flood Form