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This dataset is comprised of median Macroinvertebrate Index of Biological Integrity (M-IBI) median values at monitoring stations where one or more samples were collected within the last 10 years. This 10-Year MIBI Median, calculated from the most recent 10 years of data from the current date backward, are represented by the symbols below. Median M-IBI values present one piece of data at a point in time. Assessment methods for rivers and streams are based on the most current Wisconsin Assessment and Listing Methodology (WisCALM). Values reflected in this datalayer will be reviewed and incorporated into Clean Water Act Assessments as time and resources allow. The principal method of updating assessments on waters is through the Watershed Planning Program. |