Notice of Preliminary Designation of Certain Stormwater Discharges in the Commonwealth of Massachusetts and Notice of Availability of Draft Permit Under the National Pollutant Discharge Elimination System of the Clean Water Act

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The Regional Administrator of the Environmental Protection Agency Region 1 ("EPA") is providing notice of two proposed actions today. The first action is the Preliminary Designation of certain stormwater discharges from commercial, industrial, and institutional properties with one acre or more of impervious surface in the Charles, Neponset, and Mystic River watersheds in Massachusetts for regulation under the Clean Water Act's ("CWA") National Pollutant Discharge Elimination System ("NPDES") permitting program. Second, the Regional Administrator of the EPA Region 1 is concurrently providing notice of availability of a draft NPDES General Permit ("GP") for Private Commercial Industrial, and Institutional ("CII") Stormwater Discharges in the Charles, Mystic, and Neponset River Watersheds in Massachusetts ("Draft CII GP"). The Draft CII GP would regulate the identified stormwater discharges, as it is authorized to do under section 402 of the CWA, by requiring the implementation of Best Management Practices ("BMPs") and meeting other limitations to meet water quality standards.