Indiana SWPPP Compliance
Quick Facts for Indiana
- Authority: Indiana DEM (IDEM) (IN)
- Permit: Construction Stormwater General Permit (CSGP)
- Inspection Schedule: Weekly + within 24h of 0.5" rain
- Rain Trigger: 0.5 inches
Regulation Overview
Permitting Authority
Official Permit
Inspection Frequency
Rain Event Trigger
Inspection Requirements for Indiana
Construction projects that disturb one or more acres—or smaller sites that are part of a larger common plan—commonly require stormwater permit coverage in Indiana. Eligibility, exemptions, local approvals, and project-specific conditions vary, so confirm coverage under the Construction Stormwater General Permit (CSGP) before construction begins.
Operational Insight
This schedule combines recurring and event-driven duties. Record rainfall or discharge events independently from the weekly calendar and document why each event did or did not trigger an inspection.
Specific State Nuance
Transitioned from Rule 5 to CSGP. Self-monitoring reports must be kept on site for 3 years.
Common BMPs Checked in Indiana
- Silt Fences & Perimeters
- Construction Entrances
- Concrete Washout Areas
- Inlet Protection
- Stockpile Management
- Dust Control
Continue your field review
Check common controls in the BMP field guide, then compare them with your approved SWPPP.
Regulatory Filing
Agency Contact
Official Resources
Why Go Digital?
Handwritten logs are hard to read and easy to lose. Digital reports provide a timestamped, geo-tagged audit trail that protects your business.