New York SWPPP inspection requirements
- Rain trigger
- None — inspections are cadence-based, with no rain-triggered requirement
- Post-rain deadline
- N/A — no storm-triggered inspection
- Routine inspections
- Weekly; twice weekly (at least 2 full days apart) for sites authorized to disturb 5+ acres at once or discharging to impaired waters
- Permit
- SPDES General Permit GP-0-25-001
- Agency
- New York State Department of Environmental Conservation (NYSDEC)
How New York handles construction stormwater
Construction sites in New York disturbing one acre or more need coverage under the SPDES General Permit GP-0-25-001, administered by New York State Department of Environmental Conservation. GP-0-25-001 (effective January 29, 2025 – January 28, 2030) has no rain-triggered inspection requirement — the schedule is weekly (twice weekly for large-disturbance and impaired-water sites, every 30 days during winter shutdown), plus daily trained-contractor walkthroughs of the active work area.
Inspector qualifications
A qualified inspector: licensed PE, Registered Landscape Architect, CPESC, NYS Erosion & Sediment Control Certificate holder, or someone with 4-hour NYSDEC-endorsed training working under the direct supervision of (and at the same firm as) a PE or RLA.
Official sources
Common questions
What triggers a SWPPP inspection in New York?
New York's SPDES General Permit GP-0-25-001 has no mandatory rain-triggered inspection. The requirement is routine: weekly; twice weekly (at least 2 full days apart) for sites authorized to disturb 5+ acres at once or discharging to impaired waters.
Who can perform SWPPP inspections in New York?
A qualified inspector: licensed PE, Registered Landscape Architect, CPESC, NYS Erosion & Sediment Control Certificate holder, or someone with 4-hour NYSDEC-endorsed training working under the direct supervision of (and at the same firm as) a PE or RLA.
Who administers the construction stormwater program in New York?
New York State Department of Environmental Conservation (NYSDEC) administers the NPDES construction stormwater program in New York under the SPDES General Permit GP-0-25-001.
What are the penalties for SWPPP violations in New York?
Federal Clean Water Act civil penalties can reach $68,445 per day per violation, and NYSDEC can issue administrative orders and state penalties on top. Missing rain-triggered inspections is among the most commonly cited violations in stormwater audits.
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