SmogRank / World / South Korea / Gyeonggi-do / July 2025

Most polluted cities in Gyeonggi-do, South Korea, July 2025

26 cities in Gyeonggi-do, South Korea ranked by their average PM2.5 over the 31 days. Worst: Gimpo-si at 17.6 µg/m³, #260 of 2,832 cities in the world. Cleanest: Gapyeong at 6.8. 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.

← Hanam 3% 3%0

Every city in Gyeonggi-do, South Korea ranked for July 2025, 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.

1Hanam
3%
2Gimpo-si
0%
3Hwado
0%
4Ansan-si
0%
5Hwaseong-si
0%
6Pyeongtaek
0%
6Icheon-si
0%
8Osan
0%
9Suwon
0%
9Guri-si
0%
9Gwangmyeong
0%
12Bucheon-si
0%
13Goyang-si
0%
14Uijeongbu-si
0%
15Gwangju
0%
16Anyang-si
0%
17Namyangju
0%
18Seongnam-si
0%
19Yangp'yŏng
0%
20Munsan
0%
21Yeoju
0%
22Pubal
0%
23Anseong
0%
24Yangju
0%
25Wabu
0%
26Gapyeong
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, July 2025 · All cities in South Korea, July 2025 · Gyeonggi-do now

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SmogRank, most polluted cities in Gyeonggi-do, South Korea, PM2.5, July 2025, smogrank.com/kr/region/gyeonggi-do/history/2025-07 (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.