Welcome to the UK Air Pollution Information System (APIS). Air pollution is one of the major environmental issues in the UK, with impacts occurring at local, regional and global scales. Much is known about the impacts on natural heritage features, with major steps already being taken in the development of abatement strategies both at national and international levels. It is clear, however, that there are still major gaps in the scientific understanding. This site provides a searchable database and information on pollutants and their impacts on habitats and species.

Air Pollution Information System

Latest news

APIS 2020-2022 ammonia data change

Just over a month ago we released the new APIS 2020-2022 data. Recently, some users have pointed us out to us that the NH3 concentrations were abnormally high compared to the N depositions. We, together with the CBED team, investigated this further. We just discovered that there was a bug that caused the CBED NH3 concentrations to be calculated in ppm instead of ug/m3. This is only affecting NH3 concentrations for midyear 2021.

APIS database maintenance

UPDATE 28/05 : Everything is working as expected.

UPDATE 24/05 17:05 : our server is still under maintenance, our IT team is still working hard on this unexpected issue. The issue may be solved not until Tuesday 28th May. We apologize for the inconvenience, and will keep you updated as soon as we have more information.

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