South Korea · Asia/Seoul
Asan air quality
AQI estimate unavailable
CAMS model-based US AQI estimate
Complete eligible model windows are not available within the stale policy; pollutant concentrations are shown below.
Model values for Oct 31 15:00 KST · CAMS model estimate, may differ from monitoring stations and street-level conditions
Data may be delayed · Page generated 2026-10-31 15:22 KST
AirNow by Skymory is an independent service; it is not affiliated with or endorsed by U.S. EPA or the official AirNow service.
Pollutants now (modeled)
- PM2.5Fine particles4.1 µg/m³
- PM10Coarse particles4.6 µg/m³
- O3Ozone78.4 µg/m³
- NO2Nitrogen dioxide12.6 µg/m³
- SO2Sulphur dioxide7.9 µg/m³
- COCarbon monoxide173.7 µg/m³
Weather in Asan
See the temperature, rain and wind forecast for Asan.
Asan weather forecast on SkymoryNext 24 hours: PM2.5
Pollutant forecast
Hourly model samples in local time; no interpolation.
| Local time | PM2.5 µg/m³ | PM10 µg/m³ | O3 µg/m³ | NO2 µg/m³ | SO2 µg/m³ | CO µg/m³ |
|---|---|---|---|---|---|---|
| 4.5 | 4.8 | 73.6 | 15.6 | 8.5 | 183.5 | |
| 5.8 | 6.1 | 58.2 | 26.0 | 9.7 | 205.9 | |
| 9.2 | 9.6 | 21.4 | 55.1 | 12.0 | 267.4 | |
| 13.6 | 14.0 | 2.5 | 70.2 | 15.3 | 337.4 | |
| 17.2 | 17.9 | 0.1 | 70.4 | 18.8 | 394.1 | |
| 20.9 | 21.7 | 0.0 | 69.0 | 22.9 | 449.3 | |
| 24.4 | 25.5 | 0.0 | 67.4 | 26.7 | 508.2 | |
| 27.1 | 28.2 | 0.0 | 65.9 | 28.9 | 555.6 | |
| 28.9 | 30.2 | 0.0 | 64.5 | 28.9 | 586.2 | |
| 28.9 | 29.9 | 0.0 | 60.0 | 24.0 | 603.1 | |
| 26.9 | 27.7 | 0.0 | 56.7 | 20.1 | 590.5 | |
| 24.4 | 25.1 | 0.0 | 55.1 | 17.8 | 560.2 | |
| 23.4 | 24.2 | 0.0 | 54.0 | 17.0 | 539.0 | |
| 23.9 | 24.8 | 0.0 | 50.9 | 16.2 | 541.5 | |
| 24.2 | 25.1 | 0.0 | 47.8 | 15.2 | 551.9 | |
| 26.1 | 27.0 | 0.1 | 46.1 | 17.0 | 599.8 | |
| 27.8 | 28.7 | 0.5 | 51.0 | 18.9 | 589.2 | |
| 28.4 | 29.2 | 1.2 | 48.6 | 17.9 | 588.1 | |
| 28.2 | 29.1 | 2.0 | 47.6 | 16.7 | 504.3 | |
| 27.2 | 28.3 | 3.7 | 48.8 | 15.6 | 416.8 | |
| 26.5 | 27.6 | 4.8 | 48.4 | 14.4 | 386.7 | |
| 25.2 | 26.3 | 7.3 | 47.5 | 13.4 | 362.3 | |
| 24.6 | 25.7 | 7.4 | 46.6 | 12.6 | 361.5 | |
| 22.5 | 24.1 | 8.5 | 49.7 | 12.0 | 345.5 |
Data details: about this air quality estimate
Values are modeled by the Copernicus Atmosphere Monitoring Service (CAMS) global forecast, extracted and converted by Skymory for this city. They are model estimates on a coarse grid, not measurements from monitoring stations, and they do not resolve street-level exposure.
- Model initialization: 2026-10-30T12:00:00+00:00. Values valid: Oct 31 15:00 KST. Retrieved: 2026-10-31T03:36:09.097408+00:00.
- Page generated from a snapshot with data state STALE_USABLE; model age 18.4 hours at generation.
- Nearest valid 0.4° model grid cell, about 18 km from the city point.
- Gases are converted with matching model-level 137 temperature, humidity, surface pressure (lnsp) and hybrid coefficients; particulate matter is read directly from the surface fields.
- AQI estimate completeness: UNAVAILABLE (COMPLETE means all six pollutants have a complete model window).
The AQI estimate applies EPA breakpoints (May 2026) to explicit trailing model windows (PM 24 h, CO 8 h, NO2 1 h, SO2 and O3 per EPA rules). It is not a station observation, official daily maximum or NowCast, and the official AQI field remains unavailable.
Surface compatibility by pollutant
| Pollutant | Surface compatibility |
|---|---|
| PM2.5 | DIRECT_SURFACE |
| PM10 | DIRECT_SURFACE |
| O3 | DERIVABLE_SURFACE |
| NO2 | DERIVABLE_SURFACE |
| SO2 | DERIVABLE_SURFACE |
| CO | DERIVABLE_SURFACE |
Source and license
Contains modified Copernicus Atmosphere Monitoring Service information 2026; city extraction and concentration conversion. CAMS global atmospheric composition forecasts (ECMWF/CAMS). CC BY 4.0.
Provider times stay separate from page generation: collecting data or regenerating this page never resets the source time. Data sources and methodology
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