Madison air quality worst on record

The city's Madison East sensor saw a daily air quality index of 263 on July 16, the worst on record. Higher scores indicate worse quality. AQI data from 1996 to March 2026 shown for reference.

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Shows daily AQI reported by the Environmental Protection Agency's Air Quality System at the Madison East sensor. Latest available data.

Chart: Zoey Thomas | Wisconsin State JournalSource: Environmental Protection AgencyGet the dataCreated with Datawrapper