Erosion and sediment control required on construction sites disturbing 1+ acre under NYS SPDES General Permit GP-0-20-001. Municipalities enforce via MS4 program.
Projects disturbing one or more acres must file a Notice of Intent with NYS DEC and implement a Stormwater Pollution Prevention Plan (SWPPP) with erosion and sediment controls per NYS Standards and Specifications for Erosion and Sediment Control. This erosion control rule under Westchester County's environmental ordinances applies to unincorporated areas of Westchester County. For current statutory text, amendments, enforcement procedures, fines, appeal options, and any exemptions that may apply to your situation, contact Westchester County code enforcement directly or consult the official New York municipal code library. Ordinances change periodically; always verify with local staff before relying on summary information.
DEC fines up to $37,500/day per violation for SWPPP noncompliance.
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See how Westchester County's erosion control rules stack up against other locations.
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