SmogRank / World / South Korea / Chungcheongnam-do / April 2024

Most polluted cities in Chungcheongnam-do, South Korea, April 2024

14 cities in Chungcheongnam-do, South Korea ranked by their average PM2.5 over the 30 days. Worst: Seonghwan at 29.9 µg/m³, #77 of 2,482 cities in the world. Cleanest: Taesal-li at 17.4. A city needs measurements on 70% of the days to be ranked.

About 123K people in these 12 cities breathed unhealthy air on an average day of April 2024.

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.

← Cheonan 70.6K 70K0
Every city in Chungcheongnam-do, South Korea ranked for April 2024 with monitors in two or more places, one column each, ranked by people breathing unhealthy air: height is people on an average day, colour its average. Point at it to read a city; tap to open it.
  1. 1Cheonan
    70.6K
  2. 2Asan
    10.5K
  3. 3Hongseong
    9.55K
  4. 4Seonghwan
    7.58K
  5. 5Yesan
    5.84K
  6. 6Gongju
    5.17K
  7. 7Nonsan
    4.7K
  8. 8Tangjin
    3.93K
  9. 9Boryeong
    3.36K
  10. 10Yŏnmu
    1.79K
  11. 11Seosan
    0
  12. 12Taesal-li
    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, April 2024 · All cities in South Korea, April 2024 · Chungcheongnam-do now

Use this board

SmogRank, most polluted cities in Chungcheongnam-do, South Korea, PM2.5, April 2024, smogrank.com/kr/region/chungcheongnam-do/history/2024-04 (accessed 7 Oct 2026).

Download top 10 (PNG)

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.