Sewershed BB-027 · NYC DEP Combined Sewer Overflow Tributary Area
BB-027 - Queensbridge, Queens
Properties in this area share the BB-027 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 Queensbridge, Queens specifically.
BB-027 is a combined sewer area covering 130 properties in Queensbridge, Queens. Flood Form rates 58% of them Moderate or High for stormwater exposure, and 36% for groundwater. 38% of lots have yard area that legally qualifies for on-site infiltration. Ground elevation is typically 14 ft. The median building dates to 1941. 2% of parcels sit over a historic stream or pond.
130
Properties in sewershed
37.7%
Legally eligible for on-site infiltration
58%
Stormwater exposure: Moderate or High
36%
Groundwater exposure: Moderate or High
What sets BB-027 apart
14 ft
Median ground elevation
97%
Average impervious cover per lot
1941
Median year built
2%
Properties over a historic stream or pond
Stats computed from Flood Form’s NYC parcel data as of October 9, 2026
Common solutions for Queensbridge 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
- BB-024Queensbridge459 properties · 67% with Moderate or High stormwater exposure
- BB-023Long Island City282 properties · 73% with Moderate or High stormwater exposure
- BB-029Astoria2,689 properties · 44% with Moderate or High stormwater exposure
- BB-030Hallets Point235 properties · 60% with Moderate or High stormwater exposure
- BB-021Long Island City380 properties · 62% with Moderate or High stormwater exposure
- NCM-005Lenox Hill392 properties · 38% with Moderate or High stormwater exposure
Want to see where your specific property stands?
Get Your Property’s Flood Form