A measure of the total weight of mobile source pollutant emissions (carbon monoxide, oxides of nitrogen, and reactive organic gases) from transportation modes. Both the emission factors and the formul [..]

An index for reporting daily air quality. It determines how clean or polluted air is and what associated health effects might be of concern. The AQI focuses on health effects you may experience within [..]

A guide for reporting daily air quality. It indicates how clean or polluted the air is in a particular area and identifies potential health impacts.

A numerical index used for reporting severity of air pollution levels to the public. It replaces the formerly used Pollutant Standards Index (PSI). Like the PSI, the AQI incorporates five criteria pol [..]

The air quality index is a number indicating the air quality at a particular time in a particular area. The US EPA developed a uniform, standard index to make it easy to compare air quality in differe [..]

An accounting or measurement of specified toxic levels of pollutants in the air. Based on the EPA air quality act, it gives the indicator (number) of different gas phase concentration levels to determ [..]

The Air Quality Index is an index for reporting daily air quality. The index tells us how clean or polluted the air is currently, and what associated health effects might be a concern as a result. The [..]

An air quality index is a simple scale that assigns numbers and values (good, fair, poor, very poor) based on the potential effects of the ambient (outdoor) concentration of air pollutants. Learn more [..]

color–coded tool that shows air pollution levels.

The AQI is an index for reporting daily air quality. There are six categories each assigned a specific color to make it easier for people to understand the air pollution and associated health concerns for their community.

An index published usually on a daily basis to advise on how much airborne pollution is being monitored and what effect this will have on public health. Commonly experienced outdoor problem pollutants are PM2.5 fine combustion particulates, Nitrogen oxides (NOx), Ozone and Sulphur oxides (SOx). Others that may be experienced are Volatile Organic Co [..]