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Environmental Public Health Tracking

Adults and children enjoy playing outside.


Wisconsin Environmental Public Health Tracking (EPHT) is your source for environmental health data in Wisconsin.


We house data on more than a dozen environmental public health topics such as air quality, asthma, Lyme disease, and many others.


We work with data managers to host the most up-to-date data available.


Our data portal has improved mapping, exporting, mobility. It can also display data below the county level. (Note that the portal works best with Firefox and Chrome web browsers.)

Interested in Tracking? Subscribe to our semiannual newsletter. You can learn more about us by reading our "Getting to Know Tracking" sheet, P-02446. (PDF)

Questions? Can't find what you're looking for? Contact us at

Last revised December 27, 2023