South Korea · Asia/Seoul
Ulsan 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 14:00 KST · CAMS model estimate, may differ from monitoring stations and street-level conditions
Updated recently · Page generated 2026-10-31 14:50 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 particles29.7 µg/m³
- PM10Coarse particles50.3 µg/m³
- O3Ozone71.4 µg/m³
- NO2Nitrogen dioxide10.9 µg/m³
- SO2Sulphur dioxide7.8 µg/m³
- COCarbon monoxide311.9 µg/m³
Weather in Ulsan
See the temperature, rain and wind forecast for Ulsan.
Ulsan 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 |
|---|---|---|---|---|---|---|
| 25.2 | 39.0 | 70.3 | 11.9 | 7.8 | 285.3 | |
| 20.7 | 29.2 | 63.9 | 15.9 | 8.1 | 272.1 | |
| 17.9 | 23.7 | 49.2 | 27.9 | 8.8 | 282.6 | |
| 17.3 | 21.6 | 22.4 | 51.4 | 10.6 | 335.7 | |
| 16.7 | 20.6 | 14.3 | 60.0 | 12.4 | 372.5 | |
| 16.0 | 19.4 | 12.2 | 63.5 | 14.2 | 398.4 | |
| 15.6 | 18.5 | 10.3 | 65.7 | 15.3 | 413.4 | |
| 16.4 | 18.8 | 5.9 | 69.1 | 16.6 | 429.5 | |
| 17.7 | 19.9 | 4.7 | 68.2 | 17.4 | 454.1 | |
| 18.0 | 19.9 | 4.3 | 66.8 | 16.5 | 458.8 | |
| 17.7 | 19.3 | 4.1 | 64.8 | 15.6 | 446.3 | |
| 17.3 | 18.5 | 4.0 | 62.0 | 14.6 | 428.6 | |
| 16.7 | 17.7 | 4.0 | 58.9 | 13.5 | 412.0 | |
| 16.4 | 17.1 | 4.0 | 56.5 | 13.0 | 397.4 | |
| 16.4 | 17.0 | 4.0 | 54.9 | 13.0 | 391.3 | |
| 16.7 | 17.1 | 3.7 | 54.0 | 13.4 | 395.5 | |
| 18.6 | 19.0 | 4.2 | 53.2 | 15.8 | 440.6 | |
| 20.9 | 21.3 | 4.3 | 49.9 | 17.9 | 512.0 | |
| 20.8 | 21.3 | 5.0 | 49.5 | 18.8 | 528.1 | |
| 19.8 | 20.3 | 6.4 | 47.6 | 18.7 | 506.6 | |
| 19.6 | 20.1 | 7.1 | 43.6 | 18.1 | 508.6 | |
| 18.5 | 19.2 | 10.5 | 44.2 | 19.0 | 507.2 | |
| 18.0 | 19.0 | 11.1 | 45.1 | 19.6 | 548.5 | |
| 18.4 | 19.9 | 10.6 | 44.9 | 20.2 | 621.3 |
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 14:00 KST. Retrieved: 2026-10-31T03:39:46.000317+00:00.
- Page generated from a snapshot with data state FRESH; model age 17.9 hours at generation.
- Nearest valid 0.4° model grid cell, about 12 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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