SmogRank / World / Asia / South Korea / Chungcheongnam-do

Most polluted cities in Chungcheongnam-do, South Korea

14 measured cities, last 7 days; 1 above the WHO 24-hour guideline. Worst: Seonghwan at 16.6 µg/m³, #271 in the world.

Gyeonggi-do: 26 measured citiesGyeongsangbuk-do: 16 measured citiesChungcheongnam-do: 14 measured citiesDaejeon: 1 measured cityGyeongsangnam-do: 13 measured citiesGangwon-do: 14 measured citiesJeollabuk-do: 13 measured citiesNorth Chungcheong: 7 measured cities#14 Kinzan: 8.8 µg/m³#13 Seosan: 9.6 µg/m³#12 Gongju: 9.9 µg/m³#11 Buyeo: 10.3 µg/m³#10 Taesal-li: 10.5 µg/m³#9 Asan: 11.5 µg/m³#8 Cheonan: 11.8 µg/m³#7 Nonsan: 11.9 µg/m³#6 Boryeong: 12.4 µg/m³#5 Yŏnmu: 12.8 µg/m³#4 Hongseong: 13.6 µg/m³#3 Tangjin: 14.0 µg/m³#2 Yesan: 14.7 µg/m³#1 Seonghwan: 16.6 µg/m³
Each dot is a measured city, coloured by its PM2.5; tap a dot to open the city.
← Seonghwan 16.6 µg/m³ 15 µg/m³ WHO 24-hour guideline0
Every measured city in Chungcheongnam-do, South Korea, one column each, worst on the left and cleanest on the right; height is PM2.5 in µg/m³. Point at it to read a city; tap to open it.
  1. 1Seonghwan 65
  2. 2Yesan 61
  3. 3Tangjin 60
  4. 4Hongseong 59
  5. 5Yŏnmu 58
  6. 6Boryeong 57
  7. 7Nonsan 56
  8. 8Cheonan 56
  9. 9Asan 55
  10. 10Taesal-li 54
  11. 11Buyeo 53
  12. 12Gongju 52
  13. 13Seosan 52
  14. 14Kinzan 49
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

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SmogRank, most polluted cities in Chungcheongnam-do, South Korea, PM2.5, last 7 days to 2 Oct 2026, 07:00 UTC, smogrank.com/kr/region/chungcheongnam-do?w=7d.

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Updated 2026-10-02 07:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.