SmogRank / World / United States / Indiana / 2026
Most polluted cities in Indiana, United States, 2026
18 cities in Indiana, United States ranked by their average PM2.5 so far (278 of 365 days); 18 above the WHO annual guideline (5.0 µg/m³). Worst: Columbia City at 10.1 µg/m³, #965 of 2,745 cities in the world. Cleanest: Lafayette at 7.4. 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.
- 1Gary 2%
- 2Portage 2%
- 3Elkhart 1%
- 4East Chicago 1%
- 5Columbia City 1%
- 6Hammond 1%
- 7Fort Wayne 1%
- 8South Bend 1%
- 9Michigan City 1%
- 10Muncie 1%
- 11Anderson 1%
- 12Indianapolis 1%
- 13Bloomington 1%
- 14Lafayette 0%
- 15Evansville 0%
- 15Jeffersonville 0%
- 17Jasper 0%
- 18New Albany 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, 2026 · All cities in United States, 2026 · Indiana now
Use this board
SmogRank, most polluted cities in Indiana, United States, PM2.5, 2026 (so far), smogrank.com/us/region/indiana/history/2026 (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.