Wisconsin’s Consolidated Assessment and Listing Methodology (WisCALM)
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.
Wisconsin’s 2022 WisCALM guidance was approved Jan. 25, 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) .
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.
A public comment period was held on the draft from Oct. 12 – Nov. 20, 2020. Received comments and DNR responses are available here: Full Comments on 2022 WisCALM and DNR Response to 2022 Draft WisCALM Comments