The Environment Agency manage the UK's national monitoring sites on behalf of Defra and the Devolved Administrations.
There are around 300 Environment Agency managed monitoring sites in total across the UK which monitor air quality and these are organised into networks that gather a particular kind of information, using a particular method. The pollutants measured and method used by each network depends upon the reason for setting up the network, and what the data are to be used for.
An interactive monitoring map is available to view the locations of the sites in the UK networks.
There are two major types of monitoring networks in the UK - automatic and non-automatic networks. Use the links on the left hand side of this page to explore the different monitoring networks in the UK.
New to monitoring networks?
If you're new to the UK monitoring networks, a brief history is available and will provide some background information.
Find monitoring sites
You can search for monitoring sites across the different networks using the Find Monitoring Sites page. This provides a number of ways of finding the information you are looking for, and includes closed monitoring sites.