AirNow by Skymory

Iran · Asia/Tehran

Mashhad air quality

83

Moderate

CAMS model-based US AQI estimate

Highest pollutant sub-index: PM2.5

Model values for Oct 02 10:30 +0330 · 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 particles24.9 µg/m³
  • PM10Coarse particles47.3 µg/m³
  • O3Ozone81.3 µg/m³
  • NO2Nitrogen dioxide27.0 µg/m³
  • SO2Sulphur dioxide20.0 µg/m³
  • COCarbon monoxide384.8 µg/m³

Next 24 hours: PM2.5

Modeled PM2.5 forecast (µg/m³)Actual model samples spaced by their valid times. Range 10.2 to 56.2. Forecast, not observations.Oct 02 11:30 +0330Oct 03 10:30 +0330
Modeled PM2.5 forecast (µg/m³) · 10.2–56.2; 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
21.139.897.420.717.1326.1
16.530.3106.615.312.6277.7
13.524.0110.312.39.6245.9
11.720.4107.511.87.7230.1
10.218.197.514.56.5233.8
10.618.581.822.76.0274.4
24.431.413.478.88.7772.4
38.146.09.080.111.91268.6
43.452.17.479.014.41515.4
52.061.06.276.718.31920.3
56.265.14.874.421.42232.7
54.863.73.572.221.92342.2
49.358.32.970.020.32193.4
41.149.92.666.717.61894.5
35.143.62.663.215.01613.9
30.538.42.759.512.71375.3
27.034.42.955.911.01181.3
25.933.43.153.110.01073.5
30.938.73.951.710.51197.4
45.553.55.652.013.01778.3
48.557.38.260.814.51961.6
34.351.425.269.815.81160.6
24.651.261.644.216.7543.2
24.670.487.820.811.3298.7
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 10:30 +0330. Retrieved: 2026-10-02T04:56:14.068435+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 11 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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