Connecticut SWPPP inspection requirements
- Rain trigger
- Any storm that generates a discharge from the site
- Post-rain deadline
- Within 24 hours
- Routine inspections
- Every 7 days
- Permit
- General Permit for the Discharge of Stormwater from Construction Activities (2026)
- Agency
- Connecticut Department of Energy and Environmental Protection (DEEP)
How Connecticut handles construction stormwater
Construction sites in Connecticut disturbing one acre or more need coverage under the General Permit for the Discharge of Stormwater from Construction Activities (2026), administered by Connecticut Department of Energy and Environmental Protection. A reissued general permit took effect January 1, 2026 (expires December 31, 2030); existing permittees had to re-register by April 1, 2026. Inspect weekly and within 24 hours of any storm that generates a discharge — the 0.5″ figure matters only for weekend/holiday handling.
Inspector qualifications
A qualified inspector with DEEP-defined erosion and sediment control training.
Official sources
Common questions
What triggers a SWPPP inspection in Connecticut?
Under the General Permit for the Discharge of Stormwater from Construction Activities (2026), any storm that generates a discharge from the site triggers an inspection, within 24 hours. Routine inspections: every 7 days.
Who can perform SWPPP inspections in Connecticut?
A qualified inspector with DEEP-defined erosion and sediment control training.
Who administers the construction stormwater program in Connecticut?
Connecticut Department of Energy and Environmental Protection (DEEP) administers the NPDES construction stormwater program in Connecticut under the General Permit for the Discharge of Stormwater from Construction Activities (2026).
What are the penalties for SWPPP violations in Connecticut?
Federal Clean Water Act civil penalties can reach $68,445 per day per violation, and DEEP 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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