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NPDES Stormwater Permitting <br />Construction Sites <br />The NPDES (National Pollutant Discharge <br />Elimination System) Stormwater <br />Permitting Program for MS4's (Municipal <br />Separate Storm Sewer System) is <br />designed to reduce pollution that enters <br />surface waters from storm sewers to the <br />maximum extent practicable <br />MPCA <br />NPDES Permits <br />Industrial Sites <br />Municipalities <br />(MS4's) <br />• <br />• <br />• <br />