Worst air pollution Sihŭng, today and tomorrow
Today (16 July): Air quality in Sihŭng is fair. PM2.5 and PM1 are fair; AQI, NO2, and O3 are medium; PM10, SO2, CO, and HCHO are good. Pollution peaks around 2:00 PM (O3: 49.9/100).
Tomorrow (17 July 2026): Air quality in Sihŭng is very poor. AQI worsens to very poor; O3 increases to very poor; SO2 increases to fair; all other pollutants stay as today. Pollution peaks around 4:00 PM (O3: 81.8/100). Airmine updates local air quality forecasts four times daily.
For long term forecasts and maps, see the Airmine app
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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Sihŭng's air quality reflects the flat Gyeonggi-do western Seoul metropolitan coastal industrial position adjacent to the Sihwa Lake industrial complex, with vehicle traffic on surrounding expressways and the manufacturing and logistics corridor contributing elevated industrial emissions. Yellow Sea breezes provide limited coastal ventilation, while seasonal Chinese dust transport elevates PM10 and the Sihwa Lake industrial complex represents the most distinctive local industrial air quality source throughout the year.
Today - 16 July | Pollution peaks at 14:00
AQI:
Medium
49.9/100
PM2.5 (fine particles):
Fair
23.7/100
PM10 (coarse particles):
Good
12.2/100
NO2 (nitrogen dioxide):
Medium
43.2/100
O3 (ozone):
Medium
49.9/100
SO2 (sulfur dioxide):
Good
14.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.2/100
PM1 (ultrafine particles):
Fair
22.3/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 16:00
AQI:
Very poor
81.8/100
PM2.5 (fine particles):
Fair
32.9/100
PM10 (coarse particles):
Good
10.2/100
NO2 (nitrogen dioxide):
Medium
52.8/100
O3 (ozone):
Very poor
81.8/100
SO2 (sulfur dioxide):
Fair
30.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
16.5/100
PM1 (ultrafine particles):
Fair
39.1/100
Frequently Asked Questions
Is air quality bad in Sihŭng right now?
On 16 July 2026, overall air quality in Sihŭng is fair. PM2.5 is the main pollutant at 23.7/100. Pollution peaks around 2:00 PM (O3: 49.9/100).
Will air quality be worse tomorrow in Sihŭng?
On 17 July 2026, air quality conditions in Sihŭng will be worse than today, with AQI forecast at very poor at 81.8/100. Pollution peaks around 4:00 PM (O3: 81.8/100).
When is air pollution at its worst in Sihŭng?
Sihŭng usually sees its poorest air quality when traffic emissions, manufacturing and food processing, along with fishing fleet activity coincide with periods when windblown dust events occur. Dust carried on these winds adds substantially to particulate levels. Onshore breezes usually help clear the air, but pollution can build up when winds are light.
Are air quality levels in Sihŭng 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