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Know CWD website

Know CWD [exit DNR] General information about CWD in Wisconsin including common misconceptions.

Chronic wasting disease test results

CWD testing history

Chronic wasting disease (CWD) was originally detected in Dane County in 2002. An extensive CWD surveillance program has been conducted in Wisconsin since then. Of Wisconsin's 72 counties 18 currently have CWD detected in the wild deer herd. Of the 18 counties 15 are within the area previously known as the CWD Management Zone (CWD-MZ), three counties of which include positives just outside of the border of the former zone (Grant, Waukesha and Juneau). Three counties with positives are outside of the former zone (Washburn, Portage and Adams).

The recent disease detections in areas such as Adams, Juneau and Portage counties as well as locational data collected within the former CWD-MZ, indicate the disease is spreading. The department welcomes public involvement in new areas of detection via the county based citizen County Deer Advisory Councils (CDAC).

CWD results

CWD test results can searched for individually or viewed in a summary. To search for an individual result a customer ID or CWD barcode will be needed. Tests results are added as they become available. Negative test results are released within a day after they are received. Positive test results are released as soon as they are confirmed and the hunter has been contacted.

CWD Barcode
CWD barcode used to track deer results

Interactive CWD mapping application

A CWD results mapping application is available for users to explore CWD results in all areas of the state as well as create maps. This application shows harvest locations of all deer tested for CWD including the positive test results.

Tips for CWD map


The CWD map allows you to add a layer of CWD sampled deer number ranges or CWD positive deer number ranges with additional layers. The deer numbers are cumulative. Deer results will be added to the map as soon as they are made public.

Basic tools
map layers

Map layers – By clicking show layers you can choose what layers will show on the map. The legend will show the layers chosen as well as give the number ranges for the CWD results.

map layers

Printing and saving – Clicking print/save PDF map allows you to create a PDF map. You will be able to add a title and notes and center the map as desired.

map layers 2

Measurement tools – Distances or areas can be measured in different units such as miles or kilometers. One possible use could be how far a parcel of land is from a CWD positive.


Find location/identify – To find a specific township/range/section, county or city the find location tool can be used. The identify tools can be used to obtain additional information on map features. If the identify tools are used to click on a CWD result range the number of samples collected, analyzed and positive will be displayed.

map layers 2

Coordinate tools – Can add points to specific latitude/longitude values or click a point on the map to get the latitude/longitude values.

map layers

Drawing – Text or shapes can be added to the map.

To edit an item added to the map click edit which will bring up editing options such as color or thickness. Drawing can be erased one at a time or all items can be cleared at the same time.

map layers map layers

Note: web browser requirements

To use these interactive maps, you will need Internet Explorer 8 or higher with the Microsoft Silverlight plug-in. If you do not have the Silverlight plug-in installed, Internet Explorer will prompt you to install it.

  • Browsers Google Chrome (starting with version 45) and Microsoft Edge do not support Silverlight and these interactive maps will not work with these browsers.
  • Windows 10 users with Microsoft Edge can choose to view this site with Internet Explorer 11. Open Internet Explorer from the “Tools” menu of Edge.
  • Google Chrome version 44 and lower support the Silverlight plugin.
Contact information
For information on CWD results, contact:
Erin Larson
CWD data coordinator
Bureau of Wildlife Management
Last revised: Friday November 20 2015