Environment & Sustainability
- Environment at ANA
- Our airports
- Our commitments
- Our environmental management
What we do...
ANA has implemented a number of measures aimed at minimising impacts caused by construction work or by operational activities. To this end, it regularly monitors emission levels at its airports, in accordance with its legal obligations.
The air quality is also monitored at Humberto Delgado (Lisbon), Francisco Sá Carneiro (Porto) and Madeira airports. This monitoring is achieved through campaigns held in the summer and winter periods. We monitor concentrations of nitrogen dioxide and nitrogen oxides (NO2 and NOX), carbon monoxide (CO), sulfur dioxide (SO2), ozone (O3), particulate matter and benzene (C6H6), along with local meteorological parameters. At Lisbon Airport, ultrafine particles are also included.
In general, airport’s air quality, has remained at a mostly favorable level in terms of the air quality indexes classifications obtained. Safeguarding the specificities inherent to each airport’s location, to summer and winter periods, and local and temporary context issues, it can be said that the air quality during the monitoring campaigns results from various sources combination located in the surroundings of the measurement sites, with no evidence that emissions from airport activity have contributed significantly to the concentrations of pollutants that have been recorded.
Where do the emissions come from?
The activities carried out at the airports result in the emission of several atmospheric pollutants, associated not only with aircraft engines, but also with all the airport equipment and operations, particularly auxiliary power units (APU), and support (handling) and first aid vehicles. Apart from the mobile sources, fixed sources, such as the vehicle maintenance operations associated with fire drills and fuel storage areas, also contribute to the emission of these pollutants.
However, the emissions are not limited to airport activities, as is the case of indirect sources, such as road traffic to and from the airport.
What is the resulting potential impact?
Aircraft emissions are divided into two types: primary, related to engine exhaust, and secondary, produced in the atmosphere by chemical reactions. These can affect the atmosphere at different scales - global, regional and local - depending on their type and how the aircraft is being used.