Check Out Our Weekly Mosquito Data on Our New Dashboard!
postedWe’re your friendly neighborhood mosquito hunters!
Did you know that every summer, public health staff go out and check ditches, ponds, streams, and other water sources on public sites for mosquito larvae? If we see larvae in the field, we bring a sample back to the lab and identify the species of mosquito. If the species of mosquito we find is the type that’s able to carry West Nile Virus, and there’s more than 3 larvae in a sample, we go back to the site and treat it with larvicide. The larvicide only kills mosquito larvae. We sample every weekday between Memorial Day and Labor Day!
Why sample sites for mosquitoes?
We do this work so that we can try to reduce the number of mosquitoes that can make people sick. We track where mosquitoes that can carry diseases are most likely to be found, and we look for new species that might be moving into Dane County.
What’s on the dashboard?
At public health, we’re working to increase access to real-time, actionable data. We thought it might be useful to have access to data that updates weekly (instead of just once a season). This way, you can see how sites near you change as the season progresses.
Homepage: gives an overview of the number of sites tested and treated in the previous week, plus links to everything you need. Data are updated on Mondays.
2025 (updated weekly): Our current testing and treatment data, updated every Monday.
2024 (final results): Our 2024 testing and treatment data. This does not update regularly.
Data notes: Explains the terms on the dashboard (and we have a more detailed notes document)
Learn how to avoid mosquitoes
This content is free for use with credit to Public Health Madison & Dane County .
