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Number of impaired rivers and lakes up significantly since 2008 – Non Ferrous Mining Will not Help!

Impaired Lakes and Rivers in Minnesota up significantly since 2008.  At a time when we should be reducing the number of impaired Lakes and Rivers the State in considering adding a major toxic polluter in Non Ferrous Copper Nickel Sulfide Rock Mining.  To improve the State of Minnesota’s biotic community we are moving in the wrong direction fast.

Minnesota’s Impaired Waters and TMDLs

Impaired Waters

2010 Draft List of Impaired Waters

Impaired Waters Viewer

Statewide and Basin Assessment Maps

2009 Presentation

Section 303(d) of the Clean Water Act requires states to publish and update a list of waters that are not meeting one or more water-quality standards. The list, known as the 303(d) Total Maximum Daily Load (TMDL) list, is updated every two years (the next list will be approved in 2010). Following assessment of water quality data and an extensive public participation process, the draft TMDL list is submitted to the U.S. EPA for final approval.

Minnesota’s 2010 draft TMDL list contains 1,774 impairments on 388 rivers and 647 lakes. Minnesota’s 2008 list contained 1,475 impairments on 336 rivers and 510 lakes. The 2010 TMDL list contains target schedules to address listed waters through TMDL projects.

As noted above, the 2010 draft TMDL List contains 1,774 impairments. This is the list for which TMDL pollution reduction studies are required. But this is not the complete list of all impaired waters. The Inventory of impaired waters includes those needing a TMDL plan as noted above and those for which plans has already been developed and approved by US EPA. The Inventory also includes waterbodies that are naturally impaired, such as the arsenic exceedances in the Red River of the North.

While the draft 2010 TMDL List has 1,774 impairments, the Inventory of all impaired waters contains 3,049 impairments. Waters in the Inventory of impaired waters will remain there until they meet water quality standards.

2010 Draft TMDL List

Draft 2010 TMDL List (1,774 total)

Draft 2010 Total Listings by Parameter, 1774 total

Impaired Waters Maps




Meetings and Events

The MPCA held seven public information meetings. The following presentation was given at each meeting.




Monday, Sept. 28 MPCA Board Room 1-3 p.m.
Tuesday, Sept. 29 Detroit Lakes conference room 1-3 p.m.
Wednesday, Sept. 30 Brainerd MPCA conference room 1-3 p.m.
Thursday, Oct. 1 Duluth MPCA conference room 1-3 p.m.
Monday, Oct. 5 Marshall MPCA conference room 2-4 p.m.
Tuesday, Oct. 6 Blue Earth Public Library 1-3 p.m.
Wednesday, Oct. 7 Rochester MPCA conference room 1- 3 p.m.

TMDL List Archives

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