Air Quality Index in Castellón

How is the Air Quality Index (AQI) calculated?

Check the Air Quality Index in Castellón.

Eltiempo.es uses both the European Union methodology and that of the United States Environmental Protection Agency (EPA) with modeled data on air quality. The European Union data comes from the European Union Copernicus Atmosphere Monitoring Service (CAMS).

    The pollutants are as follows:

  • -Particulate Matter (PM2.5)
  • -Particulate Matter (PM10)
  • -Ozone (O3)
  • -Nitrogen Dioxide (NO2)
  • -Sulfur Dioxide (SO2)

From the indexes calculated for each pollutant, we select the one with the most unfavorable value. This value is the one considered as the air quality index for the day.

  • Satisfactory
  • Acceptable
  • Unhealthy for sensitive groups
  • Unhealthy
  • Very unhealthy
  • Dangerous