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In that case, the AQI value is selected according to the measurement in the station closest to your location. To avoid confusion, we show a map-based view to display the AQI level at given stations around you.ĭue to space constraints, several Google products do present a single-station reading. However, the air quality between the stations may vary, and the AQI level at the closest station to you doesn't necessarily reflect the AQI level at your specific location. We provide you with a map of all stations in your area to get a more comprehensive picture of the air quality information. Station-based solution specific How Air Quality Index (AQI) near you is selectedĪir quality levels are calculated based on air quality stations measurements.
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Other physical and chemical atmospheric processes.Industry and private households emissions.Agriculture dust storms and dust emissions.Weather conditions like wind speed and direction, and relative humidity among others.Air quality influencesĪlthough complex, Air quality is influenced by several factors: Learn more about these in the World Health Organization (WHO) website. Carbon Monoxide (CO): A gas from motor vehicles or machinery that burns fossil fuels.Īll these pollutants have health implications when they occur in high concentration.It can come from electric industries that burn fossil fuels, petrol refineries, cement manufacturing, and volcano emissions. Sulfur Dioxide (SO2): A toxic gas with a pungent, irritating odor.Ozone is a harmful pollutant produced by a chemical reaction between the sun light, organic gasses, and nitrogen oxides released by: It protects us from harmful ultraviolet radiation and the troposphere. Ozone (O3): A gas found in the stratosphere.It mainly comes from vehicles, industry, power stations, and heating. Nitrogen Dioxide (NO2): A gas and a major component of central city air pollution.Fires and dust storms can also produce high concentrations of Particulate Matter. It’s emitted from motor vehicles, wood heaters, and industry. PM10 and PM2.5 are particles with a diameter smaller than 10 micrometers and 2.5 micrometers. Particulate Matter (PM): Small solid particles and liquid droplets found in the air.The most commonly measured outdoor pollutants are: The Air Quality local Indexes are based on measurements of air pollutants. Most common types of outdoor pollutants & their sources As AQIs assign different interpretations of danger to individual pollutants, you can find differences in terms of the dominant pollutant. Dominant pollutants: AQIs define the dominant pollutant based on risk of exposure, i.e., which pollutant is harming people’s health the most right now.Pollutant concentration thresholds: Different AQIs apply their own interpretations of danger to different pollutant concentration levels.These time frames could range from 1–24 hours. Averaging times: Many official sources provide reporting based on averaged readings for defined time frames.The India AQI reports the pollutants above and on ammonia (NH3).The European AQI reports on the 6 separate pollutants mentioned above.Different countries and regions measure different pollutants for the index definition.Particulate Matter, like PM2.5 and PM10.Some common pollutants that are tracked include:.Number and type of pollutants: Different AQIs are based on different individual pollutants.It's a means to convert the level of different pollutants into one index in a digestible manner.Ĭommon differences between indexes include: Air Quality Index (AQI) is the way different governments choose to communicate air quality to the public.