Bureau of Land and Water Quality
Municipal and Industrial Stormwater Program
17 State House Station
Augusta, ME 04333-0017
Maine Multi-Sector General Permit for Stormwater Discharge Associated with Industrial Activity (MSGP) , effective December 7, 2016 through December 6, 2021
“Qualifying Storm Event” means a precipitation or ice/snow melt waters that produce a measurable discharge of 0.1 inch or more in a 24-hour period at an outfall that occurs at least 72 hours from a previous measurable storm event.
Magnitude: measurable discharge
Interval Between Storms: at least 72 hours