Vermont SWPPP inspection requirements
- Rain trigger
- Any storm that results in a stormwater discharge from the site (no inch threshold)
- Post-rain deadline
- Within 24 hours
- Routine inspections
- Weekly; daily during winter construction (Oct 15 – Apr 15) for unstabilized areas
- Permit
- Construction General Permit 3-9020 (2025)
- Agency
- Vermont Department of Environmental Conservation (VT DEC)
Verify against your permit. These values reflect the most common reading of Vermont's program; permits change and projects vary. The official permit text from VT DEC controls.
How Vermont handles construction stormwater
Construction sites in Vermont disturbing one acre or more need coverage under the Construction General Permit 3-9020 (2025), administered by Vermont Department of Environmental Conservation. The 2025 CGP 3-9020 (issued June 20, 2025) requires inspections at least every 7 days and within 24 hours of the end of any discharge-producing storm, with daily inspections during the winter construction period. Projects are tiered Low/Moderate risk (higher-risk projects need individual permits); Moderate Risk sites carry turbidity monitoring and an On-Site Plan Coordinator requirement.
Inspector qualifications
A qualified person designated by the operator. Check the current state permit for certification requirements.
Official sources
Common questions
What triggers a SWPPP inspection in Vermont?
Under the Construction General Permit 3-9020 (2025), any storm that results in a stormwater discharge from the site (no inch threshold) triggers an inspection, within 24 hours. Routine inspections: weekly; daily during winter construction (Oct 15 – Apr 15) for unstabilized areas.
Who can perform SWPPP inspections in Vermont?
A qualified person designated by the operator. Check the current state permit for certification requirements.
Who administers the construction stormwater program in Vermont?
Vermont Department of Environmental Conservation (VT DEC) administers the NPDES construction stormwater program in Vermont under the Construction General Permit 3-9020 (2025).
What are the penalties for SWPPP violations in Vermont?
Federal Clean Water Act civil penalties can reach $68,445 per day per violation, and VT DEC 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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