Indiana SWPPP inspection requirements
- Rain trigger
- 0.5″ storm event
- Post-rain deadline
- Within 24 hours
- Routine inspections
- Every 7 or 14 days
- Permit
- Construction Stormwater General Permit (CSGP)
- Agency
- Indiana Department of Environmental Management (IDEM)
Verify against your permit. These values reflect the most common reading of Indiana's program; permits change and projects vary. The official permit text from IDEM controls.
How Indiana handles construction stormwater
Construction sites in Indiana disturbing one acre or more need coverage under the Construction Stormwater General Permit (CSGP), administered by Indiana Department of Environmental Management.
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 Indiana?
Under the Construction Stormwater General Permit (CSGP), 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 Indiana?
A qualified person designated by the operator. Check the current state permit for certification requirements.
Who administers the construction stormwater program in Indiana?
Indiana Department of Environmental Management (IDEM) administers the NPDES construction stormwater program in Indiana under the Construction Stormwater General Permit (CSGP).
What are the penalties for SWPPP violations in Indiana?
Federal Clean Water Act civil penalties can reach $68,445 per day per violation, and IDEM 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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