Passive Diffusive Tube network

The real time air quality monitoring network is complemented by a passive diffusive tube network. The Environment and Resources Authority (ERA) has deployed 98 NO2 tubes and 90 VOC tubes throughout Malta and Gozo. The tubes are exposed for a period of 4 weeks (for a total of 13 exposure periods in one year) after which they are sent to a laboratory for analysis.  The annual averages can then be interpolated to provide pollution maps as follows:

NO2 levels in Malta 2014​

NO2 levels in Malta 2015

NO2 levels in Malta 2016

NO2 levels in Malta 2017 

NO2 levels in Malta 2018​

Benzene levels in Malta 2014

Benzene levels in Malta 2015 

Benzene levels in Malta 2016

Benzene levels in Malta 2017

Benzene levels in Malta 2018