Benzene and Ozone Precursor Compounds Levels at Rathmines

Data from Benzene and Ozone Precursor Compounds Levels at Rathmines

The units for all compounds are microgrammes per cubic meter.

  • The benzene annual limit value is 5 ug m-3 .
  • There are no limit values for toluene, ethylbenzene, m+p-Xylene or o-Xylene.

The Graph shows the latest available results over the last month in parts per billion (ppb). 1 ppb benzene = 3.25 ug m-3.

Sharp changes are often due to maintenance or other instrument effects and should be treated cautiously.

This data has not yet been validated as it is received automatically from the site.


The latest available results for benzene and toluene are:

Averaging Period: 01 Feb 2017 - 31 Jan 2018

Average Concentration: 0.83 ug m-3

This is below the lower assessment threshold of 2.0 ug m-3.

Average Concentration: 2.09 ug m-3

There is no limit value for toluene

Ozone Precursor Compounds

The following compounds are also measured at Rathmines: ethlybenzene, o-xylene, m-xylene and p-xylene.

Averaging Period: 01 Feb 2017 - 31 Jan 2018

Average Concentration: 0.20 ug m-3

Average Concentration: 1.18 ug m-3

Average Concentration: 0.27 ug m-3