Sewershed PR-028 · NYC DEP Combined Sewer Overflow Tributary Area
PR-028 - Graniteville, Staten Island
Properties in this area share the PR-028 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 Graniteville, Staten Island specifically.
PR-028 is a combined sewer area covering 598 properties in Graniteville, Staten Island. Flood Form rates 25% of them Moderate or High for stormwater exposure, and 5% for groundwater. 84% of lots have yard area that legally qualifies for on-site infiltration. Ground elevation is typically 27 ft. The median building dates to 1931. 7% of parcels sit over a historic stream or pond.
598
Properties in sewershed
84.3%
Legally eligible for on-site infiltration
25%
Stormwater exposure: Moderate or High
5%
Groundwater exposure: Moderate or High
What sets PR-028 apart
27 ft
Median ground elevation
67%
Average impervious cover per lot
1931
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 Graniteville 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-037Port Richmond346 properties · 38% with Moderate or High stormwater exposure
- PR-026Mariner's Harbor6,200 properties · 28% with Moderate or High stormwater exposure
- PR-029Todt Hill9,821 properties · 41% 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