Worst air pollution Cheongju, today and tomorrow
Today (16 July): Air quality in Cheongju is poor. AQI, NO2, and O3 are poor; PM2.5, SO2, and PM1 are fair; PM10, CO, and HCHO are good. Pollution peaks around 9:00 PM (NO2: 76.3/100).
Tomorrow (17 July 2026): Air quality in Cheongju is poor. PM2.5 decreases to medium; SO2 decreases to medium; PM1 decreases to medium; all other pollutants stay as today. Pollution peaks around 3:00 PM (O3: 79.1/100). Airmine updates local air quality forecasts four times daily.
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Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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Cheongju's air quality reflects the flat Chungcheongbuk-do Miho River plain at 59 metres, with vehicle traffic on surrounding expressways and the semiconductor, pharmaceutical, and manufacturing corridor contributing local sources. Seasonal Chinese dust transport elevates PM10 during spring yellow dust episodes, while the regional industrial background influences readings and Cheongju generally maintains moderate South Korean inland provincial capital readings throughout most of the year.
Today - 16 July | Pollution peaks at 21:00
AQI:
Poor
76.3/100
PM2.5 (fine particles):
Fair
32.5/100
PM10 (coarse particles):
Good
12.6/100
NO2 (nitrogen dioxide):
Poor
76.3/100
O3 (ozone):
Poor
66.2/100
SO2 (sulfur dioxide):
Fair
27.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
9.0/100
PM1 (ultrafine particles):
Fair
37.2/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 15:00
AQI:
Poor
79.1/100
PM2.5 (fine particles):
Medium
41.2/100
PM10 (coarse particles):
Good
15.7/100
NO2 (nitrogen dioxide):
Poor
72.3/100
O3 (ozone):
Poor
79.1/100
SO2 (sulfur dioxide):
Medium
40.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
15.2/100
PM1 (ultrafine particles):
Medium
43.0/100
Frequently Asked Questions
Is air quality bad in Cheongju right now?
On 16 July 2026, overall air quality in Cheongju is poor. AQI is the main air quality indicator at 76.3/100. Pollution peaks around 9:00 PM (NO2: 76.3/100).
Will air quality be worse tomorrow in Cheongju?
On 17 July 2026, air quality conditions in Cheongju will be similar to today, with AQI forecast at poor at 79.1/100. Pollution peaks around 3:00 PM (O3: 79.1/100).
When is air pollution at its worst in Cheongju?
The biggest local contributors to pollution in Cheongju are road traffic, light manufacturing, as well as harbour and shipping traffic, particularly once windblown dust events occur. Strong seasonal winds can lift dust from the surrounding dry terrain and push particulate levels sharply higher. Such events are most common in the drier shoulder seasons.
Are air quality levels in Cheongju based on measurements or forecasts?
It is forecasts derived by downscaling forecasts provided by EU’s Copernicus Atmosphere Monitoring Service (CAMS) by taking into account local conditions such as traffic patterns. CAMS bases its forecast on satellite measurements of particles and chemical compounds in the atmosphere. Airmine’s services were developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team.
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Data provided by Airmine — Last update: 16 July 2026 at 10:33 CEST (Data is updated four times daily.)
This forecast is produced independently using Airmine's own atmospheric data and models.
Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.
For long term forecasts and maps, see the Airmine app