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May 23, 2012


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Pam Arroues
Planning, Prevention and Assistance


DEQ's 2012 Status Report on Impaired and Threatened Waters Now Available


Helena -- The Montana Department of Environmental Quality (DEQ) is pleased to report that its 2012 303(d) list, which is part of the state's Water Quality Integrated Report, was approved by the U.S. Environmental Protection Agency (EPA). Montana is one of only 10 states to have submitted the final list and report to EPA by the April 1st deadline.

The 2012 report contains the list of impaired waters, changes in assessment information for waterbodies that were assessed during the two-year reporting cycle, updates to the schedule for preparing TMDLs (a TMDL is the total amount of a pollutant that a waterbody may received from all sources without exceeding water quality standards), and details on the state's revised method for determining whether a waterbody meets state water quality standards, known as the Assessment Method.

The 2012 report also identifies the pollutants that were removed from the 303(d) list (delisted) during the 2012 cycle. This includes 117 approved TMDLs which delisted pollutant causes from 45 waterbodies and the delisting of pollutant causes on three waterbodies that no longer exceed water quality standards. DEQ is further pleased to report that one of these delistings, the sediment impairment on Big Creek (tributary to the North Fork of the Flathead River), which had a TMDL, has now been restored to the level of attaining water quality standards.

The final document including appendices, attachment, GIS maps, and searchable electronic database are available via the web at

A hard copy may be purchased by contacting Department of Administration, Print and Mail Services at (406) 444-3881 or 920 Front Street, Helena MT 59601.

If you have problems accessing the report via the Internet at the web site listed above, please contact the Michael Pipp, Information Management and Technical Services Section Program Manager at (406) 444-7424, or at Alternative accessible versions of the report will be made available to persons with disabilities upon request.

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