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Wisconsin’s Consolidated Assessment and Listing Methodology (WisCALM)

WisCALM cover

Every two years, Sections 303(d) and 305(b) of the Clean Water Act require states to publish a list of all waters not meeting water quality standards and an overall report on surface water quality status of all waters in the state. To assess surface water quality throughout the state Wisconsin's Consolidated Assessment and Listing Methodology (WisCALM) guidance document is updated every two years. WisCALM provides guidance on the assessment of water quality data against surface water quality standards and for Clean Water Act reporting on surface water quality status. WisCALM updates are given to the public for their review before the guidance is finalized. Once finalized, the guidance is used in the current assessment cycle.

2022 WisCALM

Wisconsin’s 2022 WisCALM guidance was approved January 25th, 2021. This guidance is being used for the 2022 water quality assessments. Final version of 2022 WisCALM: Wisconsin 2022 Consolidated Assessment and Listing Methodology (WisCALM) [PDF].

Updates in the 2022 WisCALM draft:

  • Reorganization based on assessment type;
  • Addition of new E. coli assessment methods for updated criteria;
  • New subcategories for the Healthy Waters List indicating the amount of supporting data;
  • Addition of information on assessment timeline, automation, and total waters in the state.

A full record of changes can be found here WisCALM 2022 Change Log [PDF].

A public comment period was held on the draft from October 12 – November 20, 2020. Received comments and DNR responses are available here: Full Comments on 2022 WisCALM and DNR Response to 2022 Draft WisCALM Comments

Historical WisCALM documents

Year Documents [PDF]
2020 2020 WisCALM
2020 WisCALM Changes Log
DNR Response to Comments on 2020 WisCALM
2018 2018 WisCALM
DNR Response to Comments on 2018 WisCALM
2016 2016 WisCALM
DNR Response to Comments on 2016 WisCALM
2014 2014 WisCALM
DNR Response to Comments on 2014 WisCALM
Public Comments on 2014 WisCALM
EPA Comments on 2014 WisCALM
2012 2012 WisCALM
DNR Response to EPA Comments on 2012 Draft WisCALM
EPA Comments on 2012 Draft WisCALM
2010 2010 WisCALM
2008 2008 Methodology for Placing Waters on the Impaired Waters List
2006 2006 Methodology for Placing Waters on the Impaired Waters List
2004 2004 Methodology for Placing Waters on the Impaired Waters List
2002 2002 Methodology for Placing Waters on the Impaired Waters List