Sewershed PR-026 · NYC DEP Combined Sewer Overflow Tributary Area
PR-026 - Mariner's Harbor, Staten Island
Properties in this area share the PR-026 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 Mariner's Harbor, Staten Island specifically.
PR-026 is a combined sewer area covering 6,200 properties in Mariner's Harbor, Staten Island. Flood Form rates 28% of them Moderate or High for stormwater exposure, and 4% for groundwater. 94% of lots have yard area that legally qualifies for on-site infiltration. Ground elevation is typically 27 ft. The median building dates to 1978. 6% of parcels sit over a historic stream or pond. According to NYC DEP green infrastructure records, this sewershed drains to East River / Open Waters. NYC DEP has built 1 green infrastructure asset here.
6,200
Properties in sewershed
93.9%
Legally eligible for on-site infiltration
28%
Stormwater exposure: Moderate or High
4%
Groundwater exposure: Moderate or High
What sets PR-026 apart
27 ft
Median ground elevation
66%
Average impervious cover per lot
1978
Median year built
6%
Properties over a historic stream or pond
Stats computed from Flood Form’s NYC parcel data as of October 9, 2026
Common solutions for Mariner's Harbor 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
- PR-027Mariner's Harbor306 properties · 13% with Moderate or High stormwater exposure
- PR-028Graniteville598 properties · 25% with Moderate or High stormwater exposure
- PR-029Todt Hill9,821 properties · 41% with Moderate or High stormwater exposure
- PR-037Port Richmond346 properties · 38% with Moderate or High stormwater exposure
- PR-006New Brighton231 properties · 27% with Moderate or High stormwater exposure
- PR-031Fox Hills5,512 properties · 31% with Moderate or High stormwater exposure
Want to see where your specific property stands?
Get Your Property’s Flood Form