Prevalence information: Prevalence is the proportion or percentage of a population that tests positive for a disease and in Wisconsin the CWD prevalence rate differs throughout the state. To learn more about prevalence of CWD in Wisconsin view the CWD prevalence page including the mapping tool at the bottom of the page.

This table shows available CWD test results for the selected year for each of DNR's four zones statewide. Results for an individual year are for the CWD year, which runs from April 1st through March 31st. For example, the results for the 2021 CWD year would be April 1st, 2021 through March 31st, 2022. Deer will not have full data until the datasheet is entered.

See data for all years

See the data for CWD Year: 

Note that the DNR data reported here only includes wild deer. For information on test results for farm-raised deer and elk, please contact the DATCP Home Farm-Raised Deer Program ( (phone 608-224-4872).

DNR Zone # Sampled # Analyzed Positive for CWD
Central Forest Zone 543 543 9
Northern Forest Zone 2250 2250 1
Central Farmland Zone 6644 6644 41
Southern Farmland Zone 7661 7661 1275
Unknown Zone 49 49 1