AirNow by Skymory

Bulgaria · Europe/Sofia

Sofia air quality

42

Good

CAMS model-based US AQI estimate

Highest pollutant sub-index: PM2.5

Model values for Oct 02 10:00 EEST · CAMS model estimate, may differ from monitoring stations and street-level conditions

Data may be delayed

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 particles4.8 µg/m³
  • PM10Coarse particles4.9 µg/m³
  • O3Ozone77.4 µg/m³
  • NO2Nitrogen dioxide2.8 µg/m³
  • SO2Sulphur dioxide2.5 µg/m³
  • COCarbon monoxide156.6 µg/m³

Weather in Sofia

See the temperature, rain and wind forecast for Sofia.

Sofia weather forecast on Skymory

Next 24 hours: PM2.5

Modeled PM2.5 forecast (µg/m³)Actual model samples spaced by their valid times. Range 2.8 to 11.6. Forecast, not observations.Oct 02 11:00 EESTOct 03 10:00 EEST
Modeled PM2.5 forecast (µg/m³) · 2.8–11.6; actual sample times, no interpolated hourly values.

Pollutant forecast

Hourly model samples in local time; no interpolation.

Local timePM2.5 µg/m³PM10 µg/m³O3 µg/m³NO2 µg/m³SO2 µg/m³CO µg/m³
2.92.981.31.42.2146.3
2.82.884.11.12.1141.8
3.03.086.10.92.0138.4
3.43.487.10.81.8135.8
3.83.887.50.81.8134.5
4.04.087.40.81.8133.6
4.24.286.61.01.8134.0
4.44.484.41.41.9135.8
4.84.878.42.92.0140.1
5.45.471.65.22.2147.7
6.66.664.07.62.4156.9
7.97.958.49.22.5165.3
9.19.154.810.32.5172.2
9.99.952.011.22.5176.8
10.310.350.211.52.4177.5
10.510.549.810.72.3176.6
10.610.650.29.62.2175.2
10.610.651.18.52.2173.4
10.610.751.67.82.1172.4
10.710.852.07.42.1171.9
10.911.052.27.42.1172.2
11.611.852.28.42.2177.4
10.811.153.27.22.3174.9
6.77.576.62.32.3143.4
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: 2026-10-01T12:00:00+00:00. Values valid: Oct 02 10:00 EEST. Retrieved: 2026-10-02T04:53:42.854691+00:00.
  • Page generated from a snapshot with data state STALE_USABLE; model age 19.9 hours at generation.
  • Nearest valid 0.4° model grid cell, about 15 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: COMPLETE (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.

Averaging windows used

  • CO: 8h window
  • NO2: 1h window
  • O3: 1h, 8h window
  • PM10: 24h window
  • PM2.5: 24h window
  • SO2: 1h, 24h window

Surface compatibility by pollutant

PollutantSurface compatibility
PM2.5DIRECT_SURFACE
PM10DIRECT_SURFACE
O3DERIVABLE_SURFACE
NO2DERIVABLE_SURFACE
SO2DERIVABLE_SURFACE
CODERIVABLE_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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