How is the air quality health index calculated?

The AQHI is calculated based on the relative risks of a combination of common air pollutants that is known to harm human health. These pollutants are: Ozone (O3) at ground level, Particulate Matter (PM2.5/PM10) and.

Is 28 a good air quality index?

The higher the AQI value, the greater the level of air pollution and the greater the health concern. For example, an AQI value of 50 or below represents good air quality, while an AQI value over 300 represents hazardous air quality. AQI values at or below 100 are generally thought of as satisfactory.

What does AQHI 10 mean?

Occasionally during extreme pollution events, such as a wildfire smoke event, AQHI levels may reach 7 – 10, indicating High Health Risk, or 10+, indicating Very High Health Risk.

How is the hourly AQHI calculated?

The AQHI of the current hour is calculated from the sum of the percentage added health risk of daily hospital admissions attributable to the 3-hour moving average concentrations of four criteria air pollutants: ozone, nitrogen dioxide, sulphur dioxide, and particulate matter (PM10 or PM2.5, whichever has a higher …

What is air quality index and how is it calculated?

The Air Quality Index is calculated by comparing the concentrations of selected air pollutants to their established air quality objectives and criteria, and is based on the concentration of a pollutant that is highest relative to its standard.

What do air quality index numbers mean?

The Air Quality Index, or AQI, is a tool used to tell how clean or how polluted the air is, according to AirNow, a website of the Environmental Protection Agency (EPA). “Think of the AQI as a yardstick that runs from 0 to 500. The higher the AQI value, the greater the level of air pollution and the greater the health concern,” explained AirNow.

What does the air quality index measure?

Air quality index (AQI) is a measure used for reporting the daily air quality, by factoring the level of pollutants in the air.

How air quality and the AQI are measured?

Air quality is measured with the Air Quality Index, or AQI. The AQI works like a thermometer that runs from 0 to 500 degrees. However, instead of showing changes in the temperature, the AQI is a way of showing changes in the amount of pollution in the air. A photograph showing smog over downtown Los Angeles.