Environmental Rules in Islip, NY (2026)
5 verified environmental rules for Islip, New York, sourced directly from the municipal code and official government pages.
Verified from official government sources
Stormwater Management
Islip operates MS4 permit under NY SPDES GP-0-15-003. Town Code Chapter 58 requires stormwater pollution prevention plan (SWPPP) for any land disturbance over 1 acre. Great South Bay watershed requires special water quality measures.
Environmental: Stormwater
Heavy RestrictionsNYSDEC SPDES Stormwater Permits
Regulatory Requirements The USEPA and New York State Department of Environmental Conservation (NYSDEC) are increasing their attention in several ways. There are three State Pollutant Discharge Elimination System (SPDES) general permits required for activities associated stormwater discharges. The Multi-Sector General Permit for Stormwater Discharges Associated with Industrial Activities (MSGP) ...
Erosion Control
Any regrading, fill placement, wall installation, dumping, excavating or mining in Islip is governed by the Subdivision and Land Development Regulations under Code of the Town of Islip § 68-409B, and the Town Engineer can require a site plan review before work starts to confirm adequate on-site drainage and no harm to surrounding properties.
Islip Grading, Fill and Drainage Site Plan Review
Significant RestrictionsCode of the Town of Islip § 68-409(B), (C)
B. The regrading, placement of fill, installation of walls, dumping of material, excavating, mining, or other similar disturbance of land shall be governed by the Subdivision and Land Development Regulations. Any of the above actions may be subject to a site plan review at the determination of the Town Engineer. Said determination shall be obtained prior to commencement of the action. The site ...
Flood Zones
Any construction, filling, grading, dredging or excavation in one of Islip's FEMA-mapped special flood hazard areas needs a floodplain development permit before work starts, under Town Code § 68-441B(1). The Commissioner of Planning and Development, as local administrator, reviews the application and can require a deposit of up to $500 to cover review and inspection costs.
Islip Requires Floodplain Development Permit
Significant RestrictionsCode of the Town of Islip § 68-441B(1)
A floodplain development permit is hereby established for all construction and other development to be undertaken in areas of special flood hazard in this community for the purpose of protecting its citizens from increased flood hazards and ensuring that new development is constructed in a manner that minimizes its exposure to flooding. It shall be unlawful to undertake any development in an ar...
Boat Dock Permits
The Town of Islip requires a valid permit before anyone anchors, moors, docks or ties a boat at a Town marina under Code § 37-29. Seasonal permits run March 15 through November 15, ramp permits run March 1 through the last day of February, and unpermitted boats may be towed at the owner's expense.
Islip Marina Boat Docking Permit Required
Some RestrictionsCode of the Town of Islip § 37-29(A), (F)
It shall be unlawful for any person to anchor, moor, dock, tie or otherwise confine a boat or to permit or allow any boat to be anchored, moored, docked, tied or otherwise confined in or at a marina without a valid permit. A permit shall not be required where an existing Town of Islip contract allows access to or use of certain Town marina facilities. ... Any person violating a provision of thi...
Flood Elevation Requirements
Islip requires new construction and substantially improved homes in FEMA Zones A1-A30, AE and AH to elevate the lowest floor, including any basement, to at least two feet above the base flood elevation under Town Code § 68-442C(1). The Town also caps elevation at two feet above that minimum so builders can't overbuild past the standard, per § 68-442C(5).
Islip Requires 2-Foot Freeboard Above Base Flood
Some RestrictionsCode of the Town of Islip § 68-442C(1), (5)
Within Zones A1-A30, AE and AH, and also Zone A if base flood elevation data are available, new construction and substantial improvements shall have the lowest floor (including basement) elevated to or above two feet above the base flood elevation. ... Within all areas of special flood hazard, the elevation of the lowest floor shall not exceed the minimum required elevation by more than two feet.
Looking for Suffolk County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Islip city rules.
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