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Urban Stormwater

MS4 Permits & Stormwater Woes

Growing communities across Southwest and West-Central Montana are faced with the problem of identifying and addressing serious stormwater pollution issues. What’s an MS4? MS4s (AKA Municipal Separate Storm Sewer Systems) are permited entities under the Federal Clean Water Act, designed to address stormwater pollution from urbanized areas.  An MS4 is a conveyance or system of…