Delaware SWPPP inspection requirements
- Rain trigger
- 0.5″ storm event
- Post-rain deadline
- Within 24 hours
- Routine inspections
- Every 7 or 14 days
- Permit
- Construction General Permit
- Agency
- Delaware Department of Natural Resources and Environmental Control (DNREC)
Verify against your permit. These values reflect the most common reading of Delaware's program; permits change and projects vary. The official permit text from DNREC controls.
How Delaware handles construction stormwater
Construction sites in Delaware disturbing one acre or more need coverage under the Construction General Permit, administered by Delaware Department of Natural Resources and Environmental Control.
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 Delaware?
Under the Construction General Permit, a storm event of 0.5 inches or more triggers a post-storm inspection, generally due within 24 hours (non-work days typically extend to the next work day; check your permit). Routine inspections run every 7 or 14 days.
Who can perform SWPPP inspections in Delaware?
A qualified person designated by the operator. Check the current state permit for certification requirements.
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.
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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