4 rules for unincorporated Bronx County, New York.
Verified from official government sources
Bronx stormwater regulated by NYC DEP under NYS SPDES MS4 permit. Green Infrastructure Grant Program funds bioswales, green roofs. Properties over 20,000 sq ft disturbance need stormwater permits. Bronx River and Hutchinson River watersheds prioritized.
Bronx erosion control required on all sites disturbing 5,000+ sq ft under NYC DEP rules and NY DEC 6 NYCRR Part 750. Silt fences, stabilized construction entrances, and sediment basins required. Waterfront sites (City Island, Hunts Point) have heightened protections.
The Bronx has extensive FEMA Special Flood Hazard Areas along Long Island Sound, East River, Harlem River, Bronx River, and Hutchinson River. Hunts Point, City Island, and Throgs Neck in Zone AE. NYC Appendix G Flood Zone construction code mandates elevation 2 ft above Base Flood Elevation.
Bronx grading requires DOB earthwork permit for excavation or fill over 50 cubic yards. Final grade must direct water away from foundations and neighboring properties. NYC DEP connection permits needed for drainage to combined sewers.
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