Sewershed BB-026 · NYC DEP Combined Sewer Overflow Tributary Area
BB-026 - Sunnyside, Queens
Properties in this area share the BB-026 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 Sunnyside, Queens specifically.
BB-026 is a combined sewer area covering 628 properties in Sunnyside, Queens. Flood Form rates 63% of them Moderate or High for stormwater exposure, and 14% for groundwater. 65% of lots have yard area that legally qualifies for on-site infiltration. Ground elevation is typically 74 ft. The median building dates to 1931. 31% of parcels sit over a historic stream or pond. According to NYC DEP green infrastructure records, this sewershed drains to Newtown Creek. NYC DEP has built 97 green infrastructure assets here.
628
Properties in sewershed
64.8%
Legally eligible for on-site infiltration
63%
Stormwater exposure: Moderate or High
14%
Groundwater exposure: Moderate or High
What sets BB-026 apart
74 ft
Median ground elevation
94%
Average impervious cover per lot
1931
Median year built
31%
Properties over a historic stream or pond
Stats computed from Flood Form’s NYC parcel data as of October 9, 2026
Common solutions for Sunnyside 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-009Sunnyside1,749 properties · 46% with Moderate or High stormwater exposure
- NCQ-029Sunnyside216 properties · 21% with Moderate or High stormwater exposure
- BB-024Queensbridge459 properties · 67% with Moderate or High stormwater exposure
- BB-028Woodside5,778 properties · 37% with Moderate or High stormwater exposure
- BB-023Long Island City282 properties · 73% with Moderate or High stormwater exposure
- BB-021Long Island City380 properties · 62% with Moderate or High stormwater exposure
Want to see where your specific property stands?
Get Your Property’s Flood Form