Sewershed NCQ-029 · NYC DEP Combined Sewer Overflow Tributary Area
NCQ-029 - Sunnyside, Queens
Properties in this area share the NCQ-029 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.
NCQ-029 is a combined sewer area covering 216 properties in Sunnyside, Queens. Flood Form rates 21% of them Moderate or High for stormwater exposure, and 2% for groundwater. 43% of lots have yard area that legally qualifies for on-site infiltration. Ground elevation is typically 85 ft. The median building dates to 1930. 28% 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 16 green infrastructure assets here.
216
Properties in sewershed
42.6%
Legally eligible for on-site infiltration
21%
Stormwater exposure: Moderate or High
2%
Groundwater exposure: Moderate or High
What sets NCQ-029 apart
85 ft
Median ground elevation
93%
Average impervious cover per lot
1930
Median year built
28%
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
- BB-026Sunnyside628 properties · 63% with Moderate or High stormwater exposure
- NCQ-077Maspeth5,791 properties · 43% with Moderate or High stormwater exposure
- NCB-027Greenpoint920 properties · 57% with Moderate or High stormwater exposure
- NCB-006East Williamsburg6,259 properties · 44% with Moderate or High stormwater exposure
- NCB-022Greenpoint318 properties · 39% with Moderate or High stormwater exposure
Want to see where your specific property stands?
Get Your Property’s Flood Form