SmogRank / World / South Korea / Gyeonggi-do / August 2026
Most polluted cities in Gyeonggi-do, South Korea, August 2026
24 cities in Gyeonggi-do, South Korea ranked by their average PM2.5 over the 31 days. Worst: Gimpo-si at 14.5 µg/m³, #394 of 2,866 cities in the world. Cleanest: Yangju at 6.5. A city needs measurements on 70% of the days to be ranked.
About 14.3K people in these 20 cities breathed unhealthy air on an average day of August 2026.
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.
- 1Osan 7.7K
- 2Gimpo-si 6.56K
- 3Pyeongtaek 0
- 4Yeoju 0
- 5Ansan-si 0
- 6Guri-si 0
- 7Hanam 0
- 8Bucheon-si 0
- 9Icheon-si 0
- 10Suwon 0
- 11Anyang-si 0
- 12Goyang-si 0
- 13Namyangju 0
- 14Gwangju 0
- 15Hwaseong-si 0
- 16Uijeongbu-si 0
- 17Munsan 0
- 18Seongnam-si 0
- 19Yangp'yŏng 0
- 20Yangju 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
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SmogRank, most polluted cities in Gyeonggi-do, South Korea, PM2.5, August 2026, smogrank.com/kr/region/gyeonggi-do/history/2026-08 (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.