Sewershed WI-058 · NYC DEP Combined Sewer Overflow Tributary Area
WI-058 - Morris Heights, Bronx
Properties in this area share the WI-058 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 Morris Heights, Bronx specifically.
WI-058 is a combined sewer area covering 490 properties in Morris Heights, Bronx. Flood Form rates 20% of them Moderate or High for stormwater exposure, and 26% for groundwater. 85% of lots have yard area that legally qualifies for on-site infiltration. Ground elevation is typically 111 ft. The median building dates to 1920. 19% of parcels sit over a historic stream or pond.
490
Properties in sewershed
84.5%
Legally eligible for on-site infiltration
20%
Stormwater exposure: Moderate or High
26%
Groundwater exposure: Moderate or High
What sets WI-058 apart
111 ft
Median ground elevation
84%
Average impervious cover per lot
1920
Median year built
19%
Properties over a historic stream or pond
Stats computed from Flood Form’s NYC parcel data as of October 9, 2026
Common solutions for Morris Heights 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
- WI-059Morris Heights378 properties · 37% with Moderate or High stormwater exposure
- WI-062Mount Eden3,099 properties · 44% with Moderate or High stormwater exposure
- NR-017Washington Heights322 properties · 73% with Moderate or High stormwater exposure
- NR-006Washington Heights657 properties · 53% with Moderate or High stormwater exposure
- WI-057Fordham855 properties · 29% with Moderate or High stormwater exposure
- WI-068Mott Haven8,315 properties · 34% with Moderate or High stormwater exposure
Want to see where your specific property stands?
Get Your Property’s Flood Form