SmogRank / World / South Korea / Chungcheongnam-do / July 2025
Most polluted cities in Chungcheongnam-do, South Korea, July 2025
14 cities in Chungcheongnam-do, South Korea ranked by their average PM2.5 over the 31 days. Worst: Tangjin at 17.0 µg/m³, #277 of 2,832 cities in the world. Cleanest: Gongju at 10.2. A city needs measurements on 70% of the days to be ranked.
About 0 people in these 12 cities breathed unhealthy air on an average day of July 2025.
Ranked by people: each city's population times its share of unhealthy days, those with a daily mean over 35.4 µg/m³ (US AQI 101+). That is how many people living there breathed unhealthy air on an average day. Only cities measured at 2 or more places at least 3 km apart are ranked: one monitor shouldn't speak for a whole city. Population is the city itself, not its wider metro area.
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 2025 · All cities in South Korea, July 2025 · Chungcheongnam-do now
Use this board
SmogRank, most polluted cities in Chungcheongnam-do, South Korea, PM2.5, July 2025, smogrank.com/kr/region/chungcheongnam-do/history/2025-07 (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.