Delaware SWPPP inspection requirements
- Rain trigger
- None — weekly reviews only, no storm-triggered inspection
- Post-rain deadline
- N/A — no storm-triggered inspection
- Routine inspections
- Every 7 days
- Permit
- Construction General Permit (2026)
- Agency
- Delaware Department of Natural Resources and Environmental Control (DNREC)
How Delaware handles construction stormwater
Construction sites in Delaware disturbing one acre or more need coverage under the Construction General Permit (2026), administered by Delaware Department of Natural Resources and Environmental Control. The 2026 CGP (effective March 11, 2026 – March 10, 2030) requires weekly construction reviews with no separate storm-triggered inspection requirement.
Inspector qualifications
Reviews by a responsible person or a Certified Construction Reviewer (CCR) holding a DNREC-sponsored certificate.
Official sources
Common questions
What triggers a SWPPP inspection in Delaware?
Delaware's Construction General Permit (2026) has no mandatory rain-triggered inspection. The requirement is routine: every 7 days.
Who can perform SWPPP inspections in Delaware?
Reviews by a responsible person or a Certified Construction Reviewer (CCR) holding a DNREC-sponsored certificate.
Who administers the construction stormwater program in Delaware?
Delaware Department of Natural Resources and Environmental Control (DNREC) administers the NPDES construction stormwater program in Delaware under the Construction General Permit (2026).
What are the penalties for SWPPP violations in Delaware?
Federal Clean Water Act civil penalties can reach $68,445 per day per violation, and DNREC 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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