GEOGRAPHIC INFORMATION

Montana Waters With Surface Water Quality Assessments, 2000-2012

Data Provider Montana Department of Enivironmental Quality
Date 2000 - 2012
Content Type Offline Data
Abstract These datasets show lakes and streams that were listed in Montana's 305(b) report of water quality assessment determinations for the years 2000, 2002, 2004, 2006, 2008, 2010, and 2012.The 305(b) reports list water bodies which have been assessed as fully supporting all applicable beneficial uses, waters determined to be water quality impaired for one or more beneficial uses, and waters where the information collected to date is not sufficient to complete beneficial use support determinations. The data may be queried to select streams on the 303(d) List of Impaired and Threatened Waters. The 303(d) List, required by the federal Clean Water Act, focuses on waters in the state which have been assessed as having one or more of their beneficial uses impaired by human-caused pollution. These waters are required to have a Total Maximum Daily Load (TMDL) determined. The archive also includes the boundaries of the TMDL Planning Areas for 2000 and 2008 that the DEQ uses to group its TMDL work into manageable projects.The data source for the depiction of the water bodies in 2000 through 2004 was the U.S. Geological Survey 1:100,000 scale Digital Line Graph data. The 2006 and 2008 layers contain features from the low-resolution National Hydrography Dataset. The 2010 and 2012 features are from the 1:24,000 scale National Hydrography Dataset.These layers were formerly hosted on the Montana State Library, Natural Resource Information System, web site for the Montana Department of Environmental Quality (DEQ). Each year the information from the waterbody assessments that was attached to the map data was different, and the layers for different years are not always comparable to each other. Please see the Clean Water Act Information Center (CWAIC) web site at http://cwaic.mt.gov for current data and for access to 305(b) report data that may be linked to the features. The State Library archive of the GIS data formerly on its web site does not contain complete documentation on the meaning of all the fields included in these data sets.
Purpose To allow users to map information from Montana's 305(b) Surface Water Quality Assessment Report.
Supplemental Information
The Montana State Library provides this product/service for informational purposes only. The Library did not produce it for, nor is it suitable for legal, engineering, or surveying purposes. Consumers of this information should review or consult the primary data and information sources to ascertain the viability of the information for their purposes. The Library provides these data in good faith but does not represent or warrant its accuracy, adequacy, or completeness. In no event shall the Library be liable for any incorrect results or analysis; any direct, indirect, special, or consequential damages to any party; or any lost profits arising out of or in connection with the use or the inability to use the data or the services provided. The Library makes these data and services available as a convenience to the public, and for no other purpose. The Library reserves the right to change or revise published data and/or services at any time.
Distributor Montana State Library
PO Box 201800
 Helena, MT 59620-1800
Telephone: 406-444-5354
TDD/TTY: Montana Relay 711
Fax: 406-444-0266
Email: geoinfo@mt.gov
Distribution liability The Montana State Library provides this product/service for informational purposes only. The Library did not produce it for, nor is it suitable for legal, engineering, or surveying purposes. Consumers of this information should review or consult the primary data and information sources to ascertain the viability of the information for their purposes. The Library provides these data in good faith but does not represent or warrant its accuracy, adequacy, or completeness. In no event shall the Library be liable for any incorrect results or analysis; any direct, indirect, special, or consequential damages to any party; or any lost profits arising out of or in connection with the use or the inability to use the data or the services provided. The Library makes these data and services available as a convenience to the public, and for no other purpose. The Library reserves the right to change or revise published data and/or services at any time.
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Metadata date 10/31/2014

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