Sewershed NCB-083 · NYC DEP Combined Sewer Overflow Tributary Area
NCB-083 - Ridgewood, Queens
Properties in this area share the NCB-083 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 Ridgewood, Queens specifically.
NCB-083 is a combined sewer area covering 13,342 properties in Ridgewood, Queens. Flood Form rates 38% of them Moderate or High for stormwater exposure, and 6% for groundwater. 78% of lots have yard area that legally qualifies for on-site infiltration. Ground elevation is typically 89 ft. The median building dates to 1925. 7% 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 65 green infrastructure assets here.
13,342
Properties in sewershed
78.1%
Legally eligible for on-site infiltration
38%
Stormwater exposure: Moderate or High
6%
Groundwater exposure: Moderate or High
What sets NCB-083 apart
89 ft
Median ground elevation
88%
Average impervious cover per lot
1925
Median year built
7%
Properties over a historic stream or pond
Stats computed from Flood Form’s NYC parcel data as of October 9, 2026
Common solutions for Ridgewood 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
- NCQ-077Maspeth5,791 properties · 43% with Moderate or High stormwater exposure
- NCB-015Bushwick19,026 properties · 38% with Moderate or High stormwater exposure
- BB-006Forest Hills19,223 properties · 40% with Moderate or High stormwater exposure
- NCQ-029Sunnyside216 properties · 21% with Moderate or High stormwater exposure
- 26W-005Cypress Hills28,145 properties · 50% with Moderate or High stormwater exposure
- 26W-004New Lots4,058 properties · 45% with Moderate or High stormwater exposure
Want to see where your specific property stands?
Get Your Property’s Flood Form