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Which MS4s are regulated by the Eastern Washington Phase II Municipal Stormwater Permit?

April 26, 2017Eastern ii ms4s phase regulated Washington

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Which MS4s are regulated by the Eastern Washington Phase II Municipal Stormwater Permit?

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Regulated MS4s are those that discharge to surface or ground waters and are designated based on its location within an urbanized area, or otherwise identified by Ecology. MS4s that discharge to groundwater using Underground Injection Control (UIC), also known as drywells, are exempt from the permit.