The units are microgrammes per cubic meter.
The measurement method used for PM10 and PM2.5 is not automatic therefore the results are not available immediately. The most recent available results are shown in the graph. Check the site log for additional information.
The PM10 daily limit of 50 ug m-3 is deemed breached if more than 35 exceedances have occurred. There has been 1 exceedance at this site to date in 2012.
The PM2.5 annual target value is 25 ug m-3. There is no daily limit for PM2.5.
