"The composition of air with respect to quantities of pollution therein; used most frequently in connection with ""standards"" of maximum acceptable pollutant concentrations. [..]

measurement of pollutants and other harmful materials in the air.

measure of the pollutants in the air that is used to express how clean or polluted the air is. air resistance -

Measure of the health-related and visual charactersistics of the air. Air quality standards are the prescribed level of constituents in the outside air that cannot be exceeded during a specific time in a specified area.

The degree to which the surrounding air is pollution-­‐free. We provide systems of the highest quality to ensure air quality with appropriate filtration, humidification, and ventilation is delivered to every project.

An assessment of the presence in the atmosphere of defined pollutants, including carbon monoxide, nitrous oxides, particulate matter, and sulphur oxides. Air quality modeling is a critical task in met [..]

Scientists collect and analyze samples of air in different regions of Canada on a regular basis to determine pollutant levels. This information is not only used by decision-makers to pinpoint the sour [..]

A measure of the level of pollution in the air.

Scientists collect and analyze samples of air in different regions of Canada on a regular basis to determine pollutant levels. This information is not only used by decision-makers to pinpoint the sources of air pollution and determine strategies for reducing it, but also to produce daily air-quality forecasts that warn Canadians when smog levels ar [..]

The composition of air with respect to quantities of pollutants therein; used most frequently in connection with "standards" against which the contribution of the particular source can be compared.