The main aim of this project is to measure ozone, carbon monoxide, sulphur dioxide and PM10 at background level. However meteorological parameters such as temperature, relative humidity, wind speed and wind direction have been continuously monitored at Giordan Lighthouse since 1997. Also urban measurements of ozone, temperature, relative humidity, atmospheric pressure together with windspeed and wind direction and solar radiation are being recorded at theXewkija station.

Current instruments:
At Giordan lighthouse, the ozone analyzer (Dasibi, model 1008- RS), the anemometer (Lambrecht, model 14512) together with temperature and humidity sensors from (Campbell, UK) were all installed in January 1997. The CO monitor (Horiba, model AMPA 350E) based on non-dispersive infrared spectroscopy has been installed since March 1998. In December 2003 the sulphur dioxide analyser (Teledyne, model ML 9850) was introduced while a second ozone instrument (similarly to one already running) has been installed in April 2005 at the above station.

For the Xewkija station, the ozone analyzer (Environnement, model 41M) (also referred as a standard) was installed in May 1997. In February 1999, the air temperate and humidity sensors from Campbell were installed on the roof of this station and a year after, an atmospheric pressure sensor (Greisinnger Electronic Gmbh, model GDH 12 AN) was introduced.

Once a year, both ozone analyzers are calibrated against the standard reference. Since both the carbon monoxide and the sulphur dioxide analyzers have a base line drift, these instruments are calibrated daily. Currently all the data from both station is recorded every ten seconds and is stored as quarterly average on two separate data loggers. The data is downloaded every two days at Xewkija station for further analysis.