SmogRank / World / South Korea / Gyeonggi-do / September 2026

Most polluted cities in Gyeonggi-do, South Korea, September 2026

25 cities in Gyeonggi-do, South Korea ranked by their average PM2.5 over the 30 days. Worst: Pubal at 13.9 µg/m³, #414 of 2,949 cities in the world. Cleanest: Yangju at 6.2. 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.

← Pubal 0% 0.75%0

Every city in Gyeonggi-do, South Korea ranked for September 2026, one column each, ranked by unhealthy days: height is the share of its measured days that were unhealthy, colour its average. Point at it to read a city; tap to open it.

1Pubal
0%
2Yeoju
0%
2Gimpo-si
0%
4Gwangmyeong
0%
5Pyeongtaek
0%
6Icheon-si
0%
7Guri-si
0%
7Goyang-si
0%
9Ansan-si
0%
10Anyang-si
0%
11Osan
0%
11Hwaseong-si
0%
13Suwon
0%
14Munsan
0%
15Bucheon-si
0%
16Uijeongbu-si
0%
17Hanam
0%
18Gwangju
0%
19Hwado
0%
20Anseong
0%
21Namyangju
0%
22Wabu
0%
23Seongnam-si
0%
24Yangp'yŏng
0%
25Yangju
0%

Good0–50

Moderate51–100

Sensitive groups101–150

Unhealthy151–200

Very unhealthy201–300

Hazardous301+

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, September 2026 · All cities in South Korea, September 2026 · Gyeonggi-do now

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SmogRank, most polluted cities in Gyeonggi-do, South Korea, PM2.5, September 2026, smogrank.com/kr/region/gyeonggi-do/history/2026-09 (accessed 6 Oct 2026).

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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.