Michigan SWPPP Compliance
Quick Facts for Michigan
- Authority: Michigan EGLE (MI)
- Permit: Permit-by-Rule 323.2190
- Inspection Schedule: Weekly + within 24h of rain-caused discharge
- Rain Trigger: A rain event that causes a site discharge
Regulation Overview
Permitting Authority
Official Permit
Inspection Frequency
Rain Event Trigger
State vs. Federal (EPA)Varies
Permit-by-Rule and Certified Operator
Coverage steps differ at the five-acre threshold, while inspection duties are assigned to a Michigan-certified storm water operator.
Inspection Requirements for Michigan
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 Michigan. Eligibility, exemptions, local approvals, and project-specific conditions vary, so confirm coverage under the Permit-by-Rule 323.2190 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
A certified storm water operator must inspect at least weekly and within 24 hours after a rain event that causes a site discharge. For one-to-five-acre sites, permit-by-rule coverage is automatic after the required Part 91 soil-erosion coverage; sites disturbing five acres or more must also submit a Notice of Coverage through MiEnviro.
Common BMPs Checked in Michigan
- 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.