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tinyURL : foyp94e | ID : 879 Home   >   Water   >   Water Types and Programs   >   Impaired Waters and TMDLs   >   Assessment and Listing

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Minnesota's Impaired Waters and TMDLs

Water Quality Assessment and Listing

The Clean Water Act requires states to monitor and assess their waters to determine if they are attaining water quality standards.  The MPCA collects water quality data from state, local and federal agencies, as well as citizens, and then conducts a rigorous process to complete this assessment. To best align resources, the MPCA is following the Intensive Watershed Monitoring approach for both monitoring (agency and local via grant funds) and assessments. 

Monitoring suggests that about 40 percent of Minnesota's lakes and streams are impaired for conventional pollutants, a rate comparable to what other states are finding. Impaired waters identified through the assessment process are placed on the Minnesota's Impaired Waters List.

More information is available on the MPCA website about environmental monitoring and water quality standards.

Documents

Fact sheets

Guidance

Narrative report

The Minnesota Water Quality Narrative Report, also known as the 305(b) Integrated Report, combines two requirements of the Clean Water Act to report on the quality of the state’s waters to Congress. The following report was also sent to EPA for review along with the 2014 Proposed Impaired Waters List on April 15, 2014.

Streams

Stream assessment reports are prepared for the U.S. Congress under Section 305(b) of the Clean Water Act to:

  • estimate the extent to which Minnesota waterbodies meet the goals of the Clean Water Act and attain state water quality standards, and
  • share this information with planners, citizens and other partners in basin planning and watershed management activities.

The following documents contain the water quality assessments and are based on the 2012 Minnesota Integrated Report to Congress of the United States (July 2013). Water quality assessments are organized by major river basin.

Lakes

Lake assessment reports are prepared for the U.S. Congress under Section 305(b) of the Clean Water Act to:

  • estimate the extent to which Minnesota waterbodies meet the goals of the Clean Water Act and attain state water quality standards, and
  • share this information with planners, citizens and other partners in basin planning and watershed management activities.

The following documents contain the water quality assessments and are based on the 2012 Minnesota Integrated Report to Congress of the United States (July 2013). Water quality assessments are organized by major river basin.

Basins

basins in Minnesota

Shapefiles

These files were created for those interested in preparing computerized maps of the MPCA’s water quality assessments for lakes, streams, and wetlands. To use these files you will need GIS software. The projection for the shapefiles is UTM extended zone 15, NAD83. The shapefile was created using the 1:24,000 scale National Hydrography Dataset.

Contacts

Last modified on August 27, 2014 14:44

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