Sewershed HP-011 · NYC DEP Combined Sewer Overflow Tributary Area
HP-011 - Clason Point, Bronx
Properties in this area share the HP-011 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 Clason Point, Bronx specifically.
HP-011 is a combined sewer area covering 1,923 properties in Clason Point, Bronx. Flood Form rates 41% of them Moderate or High for stormwater exposure, and 12% for groundwater. 82% of lots have yard area that legally qualifies for on-site infiltration. Ground elevation is typically 19 ft. The median building dates to 1940.
1,923
Properties in sewershed
82.2%
Legally eligible for on-site infiltration
41%
Stormwater exposure: Moderate or High
12%
Groundwater exposure: Moderate or High
What sets HP-011 apart
19 ft
Median ground elevation
78%
Average impervious cover per lot
1940
Median year built
0%
Properties over a historic stream or pond
Stats computed from Flood Form’s NYC parcel data as of October 9, 2026
Common solutions for Clason 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
- HP-013Unionport4,602 properties · 33% with Moderate or High stormwater exposure
- HP-012Unionport745 properties · 18% with Moderate or High stormwater exposure
- HP-009Soundview1,644 properties · 50% with Moderate or High stormwater exposure
- HP-008Soundview1,033 properties · 47% with Moderate or High stormwater exposure
- HP-002Hunts Point824 properties · 42% with Moderate or High stormwater exposure
- TI-020College Point653 properties · 7% with Moderate or High stormwater exposure
Want to see where your specific property stands?
Get Your Property’s Flood Form