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~~ ~ ~- ~ ~,~~ ~~ ~ _ _~- ~ SP 14 2009 <br />520 Lafayette Road North ~ St.PauI,MN 55155-4194 ~ 651-296-6300 ~ 800-675-3843 ~ 651-282-5332 TTY ~ www.pca.state.mn.us <br />September 2009 <br />TO: Interested Parties <br />RE: Draft 2010 List of Impaired Waters and Revisions to Appendix A of the Approved <br />Statewide Mercury TMDL <br />Every two years, the Minnesota Pollution Control Agency (MPCA) is required by the <br />U.S. Environmental Protection Agency (EPA), through the Clean Water Act, to submit a list of <br />impaired waters to EPA for their review and approval. <br />1. The Draft 2010 List of Impaired Waters and Stapportin~ Documentation <br />In accordance with the requirements of Section 303(d) of the Federal Clean Water Act (CWA), <br />the MPCA will be conducting a series of public informational meetings across the state to <br />discuss its year 2010 draft list of stream segments and lakes that have impaired designated uses <br />and for which the MPCA proposes to complete total maximum daily load (TMDL) reports. Each <br />TMDL is pollutant-specific, defining the maximum amount of each pollutant that can be released <br />and assimilated in the receiving water from point and nonpoint sources, thereby allowing the <br />receiving water to meet water quality standards. <br />The MPCA is required to list, prioritize, and attach a schedule which estimates starting dates and <br />completion dates for developing the TMDL for each affected reach or lake. Schedules are <br />estimated because pollutants vary in complexity and schedules must be consistent with basin <br />planning. Please note this is not a schedule of when the water body will no longer be impaired. <br />The draft 2010 List contains 1774 impairments, including 37g new TMDL listings, among which <br />are impairments for excess nutrients in lakes, perfluorooctane sulfonate (PFOS) in fish in streams <br />and lakes, and excess nitrates in waters protected for drinking water. <br />The Inventory and Listing EXCEL file on the MPCA TMDL List web site contains many tabs; <br />the first seven are the most pertinent. This file and the Guidance Manual file are scheduled to be <br />available for review by September 24, 2009. <br />They are as follows: <br />® 'The 2010 draft 'TIYIDL List of impaired waters -these waters are not meeting water <br />quality standards and need a TMDL pollution reduction study plan <br />® T'e Inventory of Alt Impaired Waters -this tab is a compilation of all impaired <br />waters, including the draft TMDL List, those waters for which a TMDL has already been <br />approved by EPA but are not yet meeting water quality standards, and those waters <br />naturally impaired and therefore not requiring a TMDL Plan. <br />St. Paul ~ Brainerd ~ Detroit Lakes ~ Duluth ~ Mankato ~ Marshall ~ Rochester ~ Willmar ~ Printed on 100% post-consumer recycled paper <br />