his indicator will show the show the concentrations of fine particles (ie particles less than 2.5 micrometres in diameter, PM2.5) at selected New Zealand monitoring sites that exceed the daily air quality standards.

Levels of pollutants: PM₁₀

This indicator will show the concentrations of fine particles (ie particles less than 2.5 micrometres in diameter, PM2.5) at selected New Zealand monitoring sites that exceed the daily air quality standards. 

Currently, we are using a proxy measure that shows the concentrations of PM10 at selected New Zealand monitoring sites that exceed the daily air quality standards. PM10 is a pollutant of concern because it can cause respiratory infections, and reduce lung development and functioning. PM10 is of particular concern because it is found in high concentrations in some areas.

The main sources of PM10 are burning wood or coal for home heating and sea spray.

Exceedances of the daily air quality standards for PM₁₀ were recorded at

59%
of monitoring sites between 2014 and 2016.

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