Three quarters of all exceedances of the daily PM10 and PM2.5 standards occur in the winter months
We have updated our particulate matter indicators, PM10 and PM2.5.
The PM10 factsheet presents indicators of PM10 concentrations at monitoring sites in
New Zealand between 2006 and 2016. Concentrations are measured against the National Environmental
Standard for Air Quality (NESAQ) and a WHO guideline for PM10 exposure.
The PM2.5 factsheet presents indicators of PM2.5 concentrations at monitoring sites in
New Zealand between 2008 and 2016. Concentrations are measured against two WHO guidelines for PM2.5
exposure (24-hour average and annual average).
For more information, please read here.