South Korea · Asia/Seoul
Yangsan 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 particles31.5 µg/m³
- PM10Coarse particles55.3 µg/m³
- O3Ozone77.1 µg/m³
- NO2Nitrogen dioxide12.2 µg/m³
- SO2Sulphur dioxide8.2 µg/m³
- COCarbon monoxide297.7 µg/m³
Weather in Yangsan
See the temperature, rain and wind forecast for Yangsan.
Yangsan 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 |
|---|---|---|---|---|---|---|
| 28.1 | 44.9 | 68.2 | 17.1 | 8.6 | 285.6 | |
| 25.7 | 37.2 | 46.9 | 32.8 | 9.9 | 293.6 | |
| 25.4 | 33.1 | 20.3 | 55.1 | 12.9 | 338.7 | |
| 24.2 | 29.8 | 18.8 | 55.6 | 15.6 | 355.8 | |
| 23.6 | 28.1 | 17.7 | 56.2 | 18.3 | 372.3 | |
| 22.7 | 26.5 | 16.7 | 56.6 | 19.7 | 377.5 | |
| 21.7 | 25.0 | 16.1 | 56.8 | 20.7 | 379.8 | |
| 22.5 | 25.3 | 15.8 | 54.7 | 21.0 | 407.0 | |
| 22.1 | 24.5 | 16.0 | 52.7 | 18.0 | 408.8 | |
| 21.0 | 23.0 | 16.3 | 51.0 | 16.3 | 391.5 | |
| 20.5 | 22.2 | 16.5 | 48.5 | 15.5 | 382.3 | |
| 20.3 | 21.9 | 16.3 | 46.1 | 15.3 | 376.4 | |
| 19.9 | 21.3 | 15.6 | 44.4 | 15.1 | 369.2 | |
| 19.2 | 20.4 | 15.0 | 43.7 | 15.0 | 358.9 | |
| 18.9 | 19.9 | 14.3 | 44.2 | 15.7 | 354.4 | |
| 21.3 | 22.3 | 14.6 | 46.5 | 20.9 | 395.4 | |
| 24.5 | 25.4 | 14.7 | 46.4 | 24.8 | 463.3 | |
| 22.5 | 23.4 | 16.5 | 49.6 | 25.2 | 414.8 | |
| 21.1 | 22.0 | 17.9 | 48.1 | 25.0 | 378.6 | |
| 19.2 | 20.0 | 19.5 | 50.1 | 24.6 | 336.2 | |
| 17.6 | 18.5 | 22.9 | 49.0 | 24.5 | 316.0 | |
| 17.0 | 17.9 | 24.1 | 48.6 | 24.9 | 316.0 | |
| 18.3 | 19.2 | 21.1 | 48.7 | 25.7 | 341.2 | |
| 19.6 | 20.8 | 16.5 | 49.9 | 26.4 | 381.1 |
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: 2026-10-31T03:34:56.324415+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 22 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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