The colors used for PM2.5, PM10 and Ozone (O3) are based on the US EPA standard. The colors used for Nitrogen Dioxide (NO2), Sulphur Dioxide (SO2) and Carbon Monoxide (CO) are based on an arbitrary color standard which best matches the concentration range. It does not have any relation with the AQI breakpoints, as in most cases, the AQI for those 3 gases is most often below 50.
The scale for the color range below is expressed in raw concentration (in mg/m3).
How accurate are the forecasts?
Check the correlation graphs below for PM2.5, PM10 and Ozone for the past 30 days.
(Note that by default, all values below are expressed in AQI (without averaging), and that forecast values are based on the the forecast computed today for tomorrow, i.e. based on the 24H-48H forecast range).
Note: The convertion from ppm to mg/m3 for the Ozone is based on the STP US standard.
For a comparative analysis several Air Quality Forecast models applied to Beijing, check the forecast/Beijing page.
For a full list of all Air Quality Forecast models being analyzed, check the forecast models page:
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This forecasting model, and all AQFS which it is based on, are research products intended to provide information related to Air Quality forecast. All reasonable measures have been taken to ensure its quality and accuracy. However:
For more information about the underlying concepts of Air Quality forecasting (or Atmospheric Dispersion Modeling), check the article on a visual study of wind impact of PM2.5 concentration.
- | Nilai Indeks Kualitas Udara (AQI). | Tingkat Kekhawatiran Kesehatan |
0 - 50 | Baik | Kualitas udara dianggap memuaskan, dan polusi udara menimbulkan sedikit atau tanpa risiko |
51 -100 | Moderat | Kualitas udara dapat diterima; Namun, untuk beberapa polutan mungkin ada kekhawatiran kesehatan yang moderat untuk sejumlah kecil orang yang sangat sensitif terhadap polusi udara. |
101-150 | Tidak Sehat untuk kelompok orang yang sensitif | Anggota kelompok sensitif dapat mengalami efek kesehatan. Masyarakat umum tidak mungkin terpengaruh. |
151-200 | Tidak sehat | Setiap orang mungkin mulai mengalami efek kesehatan; anggota kelompok sensitif dapat mengalami efek kesehatan yang lebih serius |
201-300 | Sangat Tidak Sehat | Peringatan kesehatan untuk kondisi darurat. Seluruh penduduk lebih mungkin terpengaruh. |
300+ | Berbahaya | Peringatan kesehatan: semua orang mungkin mengalami efek kesehatan yang lebih serius |