Sewershed JAM-006 · NYC DEP Combined Sewer Overflow Tributary Area
JAM-006 - South Richmond Hill, Queens
Properties in this area share the JAM-006 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 South Richmond Hill, Queens specifically.
JAM-006 is a combined sewer area covering 327 properties in South Richmond Hill, Queens. Flood Form rates 50% of them Moderate or High for stormwater exposure, and none for groundwater. 81% of lots have yard area that legally qualifies for on-site infiltration. Ground elevation is typically 51 ft. The median building dates to 1920. 5% of parcels sit over a historic stream or pond. According to NYC DEP green infrastructure records, this sewershed drains to Jamaica Bay and Tributaries. NYC DEP has built 20 green infrastructure assets here.
327
Properties in sewershed
80.7%
Legally eligible for on-site infiltration
50%
Stormwater exposure: Moderate or High
0%
Groundwater exposure: Moderate or High
What sets JAM-006 apart
51 ft
Median ground elevation
88%
Average impervious cover per lot
1920
Median year built
5%
Properties over a historic stream or pond
Stats computed from Flood Form’s NYC parcel data as of October 9, 2026
Common solutions for South Richmond Hill 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
- JAM-003South Ozone Park21,926 properties · 49% with Moderate or High stormwater exposure
- JAM-003aSouth Ozone Park2,900 properties · 42% with Moderate or High stormwater exposure
- 26W-005Cypress Hills28,145 properties · 50% with Moderate or High stormwater exposure
- BB-006Forest Hills19,223 properties · 40% with Moderate or High stormwater exposure
- TI-010Auburndale33,845 properties · 39% with Moderate or High stormwater exposure
- JAM-005Cambria Heights12,386 properties · 32% with Moderate or High stormwater exposure
Want to see where your specific property stands?
Get Your Property’s Flood Form