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

Testing Search by Location

Submitted by audric on Thu, 22/05/2025 - 15:09

Dear APIS community,

Today, we are trialling a new Search by Location tool within the APIS web tool, under the Results page, as a new tab. It is currently accessible only to a few users, who have been given a password to test it, report issues and suggest improvements. We plan onto removing the password protection and making the new Search by Location tool public within the next few weeks. If you would also like to a access it meanwhile, please contact us via the usual contact form.

All the best

APIS maintenance - 06/05/25 [SOLVED]

Submitted by Cristina Martin... on Tue, 06/05/2025 - 09:03

Update 06/05/2025 17:09 - APIS and MCP tools are now back up.

APIS GIS map and MCP tools are down

APIS database is under unexpected maintenance today (sorry for the short notice) It should all be back to normal tomorrow. We apologize for the inconvenience, and will keep you updated as soon as we have more information.

[Solved] GIS map tool and MCP tool down

Submitted by audric on Wed, 19/02/2025 - 09:14

EDIT 19/02/2025 10:25: All tools are back up.

The APIS GIS mapping tool and the MCP tool are currently down due to an unexpected server issue. Our IT services are currently working on solving the issue. We apologize for any inconvenience.

APIS website update - old tools withdrawal

Submitted by audric on Tue, 10/12/2024 - 16:28

Dear community,

To comply with the latest safety standards, the APIS website will be upgraded by the 5th January. While it mostly means a layout change for users, two tools will be withdrawned, as they cannot be supported in the new version of the APIS website:

APIS 2020-2022 ammonia data change

Submitted by Anonymous (not verified) on Fri, 26/07/2024 - 14:29

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.

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