SmogRank / World / South Korea / Gyeonggi-do / August 2025
Most polluted cities in Gyeonggi-do, South Korea, August 2025
26 cities in Gyeonggi-do, South Korea ranked by their average PM2.5 over the 31 days. Worst: Hwado at 17.1 µg/m³, #264 of 2,841 cities in the world. Cleanest: Gapyeong at 6.2. A city needs measurements on 70% of the days to be ranked.
About 0 people in these 20 cities breathed unhealthy air on an average day of August 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.
- 1Icheon-si 0
- 2Gimpo-si 0
- 3Pyeongtaek 0
- 4Hanam 0
- 5Ansan-si 0
- 6Suwon 0
- 6Guri-si 0
- 8Yeoju 0
- 9Hwaseong-si 0
- 10Osan 0
- 11Goyang-si 0
- 12Gwangju 0
- 13Namyangju 0
- 14Uijeongbu-si 0
- 15Yangp'yŏng 0
- 16Bucheon-si 0
- 17Anyang-si 0
- 17Seongnam-si 0
- 19Munsan 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
All cities in the world, August 2025 · All cities in South Korea, August 2025 · Gyeonggi-do now
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SmogRank, most polluted cities in Gyeonggi-do, South Korea, PM2.5, August 2025, smogrank.com/kr/region/gyeonggi-do/history/2025-08 (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.