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  1. The index aims to help the public easily understand the air quality and protect people's health. The CAI is on a scale from 0 to 500, which is divided into six categories. The higher the CAI value, the greater the level of air pollution. Of values of the five air pollutants, the highest is the CAI value.

  2. Aug 4, 2018 · Here’s how each of the AQI categories are represented, how they can impact human health, and some recommendations for what to do when the AQI has reached a higher category. The categories are listed from least harmful to human health (“good”) to the most harmful (“hazardous”).

  3. The DAQI tells you about levels of air pollution. It also provides health advice in the form of recommended actions you may wish to take, according to the level of air pollution. The index is...

  4. The index is numbered 1-10 and divided into four bands, low (1) to very high (10), to provide detail about air pollution levels in a simple way, similar to the sun index or pollen index....

  5. Sep 22, 2022 · The greater the density of pollutants in the air, the higher the Air Quality Index (AQI), a scale that runs from zero to 500. An AQI of 50 or below is considered safe, while readings above 100 are deemed unhealthy.

  6. The Air pollution (DAQI) is the standard index defined by Defra for characterising air quality. Air quality can also be degraded by the release of other, less common pollutants, for...

  7. www.nasa.gov › general › what-is-air-qualityWhat is Air Quality? - NASA

    1 day ago · To measure and report on air quality, the EPA uses the United States Air Quality Index (AQI). The AQI is calculated by measuring each of the six primary air pollutants on a scale from “Good” to “Hazardous,” to produce a combined AQI numeric value 0-500. “Usually when we’re talking about air quality, we’re saying that there are ...

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