About Air Quality
Welcome to the UK Air Quality network. This website is designed to show real-time and historic air quality measurements, statistics, reports
Pollutant measurements are collected automatically every hour from many locations for public information. These measurements are quality controlled in real-time before displaying on the website. The final results are quality controlled annually following the requirements of the UK Local Air Quality Management: Technical Guidance LAQM.TG(09).
Here are some topics providing background information on air quality.
Daily Air Quality Index (DAQI) – showing the current air quality measurements as
colour coded bands based on the latest medical research
UK and EU air quality limits – full list of air quality standards, objectives, target values
and limit values
Monitoring site locations – classifications based on the local environment with some examples
How air quality is measured – common measurement techniques
Air Quality Statistics – example annual report showing the air quality statistics
How air quality data are ratified and QA/QC – the methodology used by the UK national air quality network (AURN)
Examples of good and poor quality control – plotting the data is the final quality control step
Air Quality Links
Further information can be obtained from a wide range of air quality websites.
§ Air Quality Glossary- Glossary of air quality terminology
§ Northern Ireland - Air Quality Information
§ Scotland - Air Quality Information
§ UK and Regional - Air Quality Forecast
§ UK-Air - Air Information Resource
§ Wales - Air Quality Information
§ Northern Ireland - Kid's Corner
§ Scotland – Air Quality Detectives and Clear the Air
Our UK air quality networks
§ UK Air Quality - Air Quality in the UK
§ Herts and Bed Air Quality Network - Air Quality in Hertfordshire and Bedfordshire
§ Norfolk Air Quality - Air Quality in Norfolk
The quality of the air quality measurements meets the requirements of the UK Local Air Quality Management: Technical Guidance LAQM.TG(09). The Data Quality Objectives sets the required accuracy of the final results after data validation and ratification.
Our air quality websites also
For instance, the large air quality archive contains the measurements from hundreds of monitoring stations which provide valuable comparisons for quality control. The annual mean NO2 concentrations (dotted lines) from this archive broadly follow the trend for the AURN UK national monitoring network (solid lines). The concentrations for Roadside and Urban Background monitoring stations have now, on average, declined below the National Air Quality Standard of 40 µg m-3. A similar decrease is shown for the Gravimetric PM10 annual means. Note that most NO2 and PM10 monitoring stations do not belong to the AURN.
While the average NO2 is now below the National Air Quality Standard, many monitoring stations exceeded the standard during 2013. Comparing measurements with nearby locations is an essential stage of our quality control.
We also use performance targets derived from the Technical Guidance LAQM TG(09) and the LAQM annual reporting cycle. These set an annual data capture target of 90% and deadlines for reporting the results. Our targets are therefore set to
· Annual Data Capture target of at least 90%
· Reporting the air quality statistics each quarter by the end of the following month and annually by the end of the following February
The two plots below show that for our air quality networks, on average, we continue to meet the data capture and reporting targets.