Benzene and Ozone Precursor Compounds Levels at Rathmines

Data from Benzene and Ozone Precursor Compounds Levels at Rathmines

The Graph shows the latest available results over the last 14 days in parts per billion (ppb). 

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 benzene annual limit value is 5 ug m-3 (1 ppb benzene = 3.25 ug m-3)
  • There are no limit values for toluene, ethylbenzene, m+p-Xylene or o-Xylene


The latest available results for benzene and toluene are:

Averaging Period: 01 Jul 2017 - 30 Jun 2018

Average Concentration: 0.69 ug m-3

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

Average Concentration: 1.77 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 Jul 2017 - 30 Jun 2018

Average Concentration: 0.13 ug m-3

Average Concentration: 0.82 ug m-3

Average Concentration: 0.16 ug m-3