SmogRank / World / United States / Minnesota / July 2026
Most polluted cities in Minnesota, United States, July 2026
16 cities in Minnesota, United States ranked by their average PM2.5 over the 31 days. Worst: Duluth at 42.3 µg/m³, #59 of 2,751 cities in the world. Cleanest: Marshall at 9.5. A city needs measurements on 70% of the days to be ranked.
Ranked by unhealthy days: the share of each city's measured days with a daily mean over 35.4 µg/m³ (US AQI 101+), Unhealthy for Sensitive Groups or worse on the US EPA's scale. Ties go to the higher average.
- 1Duluth 13%
- 2Virginia 10%
- 3Cloquet 10%
- 4Brainerd 10%
- 5Blaine 10%
- 6Burnsville 10%
- 7Minneapolis 10%
- 8Saint Paul 10%
- 9Apple Valley 10%
- 10Saint Cloud 6%
- 11Saint Michael 6%
- 12Shakopee 6%
- 13Detroit Lakes 6%
- 14Rochester 3%
- 15Mankato 0%
- 16Marshall 0%
The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales
All cities in the world, July 2026 · All cities in United States, July 2026 · Minnesota now
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SmogRank, most polluted cities in Minnesota, United States, PM2.5, July 2026, smogrank.com/us/region/minnesota/history/2026-07 (accessed 6 Oct 2026).
You're welcome to reuse a single chart, image or figure with this citation and a link. Terms. Raw monitor readings in bulk are published by OpenAQ, under each provider's licence.