Sewershed BB-030 · NYC DEP Combined Sewer Overflow Tributary Area
BB-030 - Hallets Point, Queens
Properties in this area share the BB-030 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 Hallets Point, Queens specifically.
BB-030 is a combined sewer area covering 235 properties in Hallets Point, Queens. Flood Form rates 60% of them Moderate or High for stormwater exposure, and 40% for groundwater. 88% of lots have yard area that legally qualifies for on-site infiltration. Ground elevation is typically 13 ft. The median building dates to 1925. 42% of parcels sit over a historic stream or pond.
235
Properties in sewershed
88.1%
Legally eligible for on-site infiltration
60%
Stormwater exposure: Moderate or High
40%
Groundwater exposure: Moderate or High
What sets BB-030 apart
13 ft
Median ground elevation
84%
Average impervious cover per lot
1925
Median year built
42%
Properties over a historic stream or pond
Stats computed from Flood Form’s NYC parcel data as of October 9, 2026
Common solutions for Hallets Point 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-032Hallets Point180 properties · 8% with Moderate or High stormwater exposure
- BB-031Astoria555 properties · 45% with Moderate or High stormwater exposure
- BB-029Astoria2,689 properties · 44% with Moderate or High stormwater exposure
- BB-034Ditmars5,122 properties · 39% with Moderate or High stormwater exposure
- BB-027Queensbridge130 properties · 58% with Moderate or High stormwater exposure
- WI-012Yorkville353 properties · 26% with Moderate or High stormwater exposure
Want to see where your specific property stands?
Get Your Property’s Flood Form