What's New

Keeping you Up-to-Date with Changes to the LAQM Pages

The LAQM Helpdesk is operated on behalf of Defra and the Devolved Administrations by Bureau Veritas, in conjunction with contract partners AECOM and the National Physical Laboratory, and replaces the three previously separate helpdesks which were in operation for LAQM.

26 November 2019

The latest summaries of participating laboratories' performance in the AIR-PT scheme for NO2 diffusion tubes have been added and are available via the QA QC Framework Webpage.

6 November 2019

The 2020 Diffusion Tube Monitoring Calendar, providing recommended exposure dates, is now available here.

16 October 2019

The 2019 update of the London Local Air Quality Management Framework (LLAQM) has now been published and is available here.

The 2019 Framework includes a number of revised sections such as updates on the Cleaner Air Borough Status and updates to the LLAQM guidance documents.

15 October 2019

FAQ 138 is now published and describes the method of diffusion tube bias adjustment for local authorities, where there has been a change in supplier/preparation method during the course of a monitoring year. 

Please contact the Helpdesk should you require any clarification.

09 October 2019

Local authorities in England can now apply for the Air Quality Grant Scheme 2019 to 2020. The scheme is dedicated to providing at least £2 million funding to English local authorities in support of the development and/or implementation of measures to improve local air quality.

In particular, Defra are looking for applications with projects designed to:

  • Provide air quality benefits soon (i.e. in next 1 to 2 years); and/or
  • Develop solutions over the longer term by increasing awareness and encouraging behavioural change.

The grant is competitive, with priority given to local authorities that have identified and/or projected exceedances reported in line with the national assessment of air quality, and/or that have one or more Air Quality Management Areas (AQMAs).

Applications must be received by midday on 07 November 2019.

Further information about the Air Quality Grant Scheme can be found after registering an interest on Defra’s Bravo online system.  Once registered you will be able to access the Invitation to Apply (ITA) document, which contains detailed information about the Air Quality Grant and Application process.
 
If you have any further queries about the Air Quality Grant Scheme that are not covered in the ITA, please log on to Bravo and use the secure messaging service to communicate with the Authority and seek clarifications. You must state in your clarification message if you do not want the message to be made public to other Applicants. Any queries received through other means will be redirected to use the secure messaging facility on Bravo.
 
If you have any further questions on this year’s Air Quality Grant, please contact air.quality@defra.gov.uk directly. 

17 September 2019

A number of updates have taken place on 17 September 2019. Please follow the links below for more information.

  • The National Diffusion Tube Bias Adjustment Factors Spreadsheet September 2019 Update is now available. We would like to thank all the local authorities who submitted co-location study results. This concludes the final round of National Diffusion Tube Bias Adjustment Factors for 2018 diffusion tube monitoring data released within 2019. The next update, which will incorporate diffusion tube monitoring data for 2019, is due March 2020 (Round 1 of 3). Local Authorities can return co-location studies for participating diffusion tubes completed within 2019 for inclusion (pending data quality checks) in the next update using the following questionnaire.
  • The summary of NO2 Diffusion Tube precision information has also been updated here.
  • The latest summaries of participating laboratories' performance in the AIR-PT scheme for NO2 diffusion tubes have been added and are available via the QA QC Framework Webpage.

27 June 2019

A number of updates have taken place on 27 June 2019. Please follow the links below for more information.

  • The summary of NO2 Diffusion Tube precision information has also been updated here.

07 May 2019

A number of updates have taken place on 07 May 2019. Please follow the links below for more information:

A full list of Tools is available here.

26 March 2019

A number of updates have taken place on 26 March 2019. Please follow the links below for more information.

  • The summary of NO2 Diffusion Tube precision information has also been updated here.
  • As of the 25th of March 2019, the Greater London Assembly opened an 8 week long consultation on the revised London Local Air Quality Management (LLAQM) framework. The revised LLAQM framework includes a full refresh of the Air Quality Action Matrix and Cleaner Air Borough criteria. It also includes a number of updates to the Policy and Technical Guidance. This consultation is primarily for London boroughs, however other stakeholders are also welcome to comment. The deadline for responses is midday on 20 May 2019. Details of the consultation can be found here: www.london.gov.uk/LLAQM-consultation.

14 January 2019

The government has today published its Clean Air Strategy.

The document sets out an overarching strategy to demonstrate how the government will tackle all sources of air pollution making our air healthier to breathe, protecting nature and boosting the economy. The document complements three other UK government strategies, the:

Industrial Strategy
Clean Growth Strategy
25 Year Environment Plan

This document builds on an extensive consultation process undertaken last year. A document summarising the responses to the consultation has been published alongside the strategy.

Defra would very much like to thank anyone who contributed during the consultation process.

28 November 2018

The latest summaries of participating laboratories' performance in the AIR-PT scheme (formerly WASP) for NO2 diffusion tubes have also been added and are available here.

17 October 2018

The 2019 Diffusion Tube Monitoring Calendar, providing recommended exposure dates, is now available via the Diffusion Tube web page.

26 September 2018

A number of updates have taken place on 26 September 2018. Please follow the links below for more information.

  • The National Diffusion Tube Bias Adjustment Factors Spreadsheet September 2018 Update is now available. We would like to thank all the local authorities who submitted co-location study results. This concludes the final round of National Diffusion Tube Bias Adjustment Factors for 2017 diffusion tube monitoring data released within 2018. The next update, which will incorporate diffusion tube monitoring data for 2018, is due March 2019 (Round 1 of 3). Local Authorities can return co-location studies for participating diffusion tubes completed within 2018 for inclusion (pending data quality checks) in the next update using the following questionnaire.

  • The summary of NO2 Diffusion Tube precision information has also been updated here.

03 July 2018

A number of updates have taken place on 03 July 2018. Please follow the links below for more information.

  • The National Diffusion Tube Bias Adjustment Factors Spreadsheet July 2018 Update is now available. We would like to thank all the local authorities who submitted co-location study results. Local authorities can continue to return co-location studies for diffusion tubes for inclusion (pending data quality checks) in the next update which is due in September 2018. Click here to download the updated Adjustment Factors Spreadsheet.
  • The summary of NO2 Diffusion Tube precision information has also been updated here.

31 May 2018

The Welsh APR 2018 LAQM Report Template is now available.

As per previous years, Regional Groups which include several authorities are able to submit combined reports. Completed reports should be submitted via the RSW system in line with the relevant report submission deadlines. Local authorities are reminded to check that their AQMA details are up-to-date as part of the report submittal process and update as necessary.

 22 May 2018

The government has today published its Clean Air Strategy for consultation.

As you are aware, air pollution is a significant threat to public health, comparable to cancer, obesity and heart disease. The proposals, which aim to cut air pollution and save lives, include ambitious new goals for particulate matter in line with World Health Organisation recommendations and the introduction of new primary legislation, which will give local government new powers to improve air quality.

 This is the UK’s first Clean Air Strategy to commit to the comprehensive action required across all parts of Government and society to clean up our air. It is one of the first strategies to be published as part of the 25 Year Environment Plan. 

Defra would very much welcome your views on the proposals in order to help shape the final Strategy. The consultation closes on 14 August and details of how to respond are included in the consultation.

If you have any questions on the consultation, please contact:
cleanair.consultations@defra.gsi.gov.uk

26 April 2018

In response to user feedback, the England (not London) ASR 2018 Word template and associated Excel data template have been updatedIt should be noted that the information and template requirements have not changed, rather the explanatory text has been revised to clarify the following:

  • Table A.3 - The monitored values entered in Table A.3 should be those at the location of the monitoring site (bias adjusted and annualised, as required), not those following any fall off with distance correction.
  • Table B.1 - The distance corrected annual mean is only required if the location is not relevant to public exposure and meets the criteria specified in para 7.78 of TG16. If the monitoring location is relevant to annual mean public exposure, please leave the final column blank or add a dash.

29 March 2018

A number of updates have taken place on 29 March 2018. Please follow the links below for more information.

  • The National Diffusion Tube Bias Adjustment Factors Spreadsheet March 2018 Update is now available.  We would like to thank all the local authorities who submitted co-location study results. Local authorities can continue to return co-location studies for diffusion tubes for inclusion (pending data quality checks) in the next update which is due in June 2018. Click here to download the updated Adjustment Factors Spreadsheet.
  • The latest summaries of participating laboratories' performance in the AIR-PT scheme (formerly WASP) for NO2 diffusion tubes have also been added and are available here.
  • The summary of NO2 Diffusion Tube precision information has also been updated here.
  • An updated version of the NO2 Fall off with Distance Calculator is now available. This includes the ability to process multiple diffusion tubes within the same calculation sheet. Click here to download the updated NO2  Fall off with Distance Calculator.

 23 March 2018

A number of updates have taken place on 23 March 2018. Please follow the links below for more information.

  • The RSW system has been updated to allow users to upload their 2018 LAQM Reports (registered users only).

  • With the exception of the Welsh APR template, the 2018 LAQM Report Templates are now available. The Welsh APR template will be released shortly with further notification provided, once available. As per previous years, Regional Groups which include several authorities are able to submit combined reports. Completed reports should be submitted via the RSW system in line with the relevant report submission deadlines. Local authorities are reminded to check that their AQMA details are up-to-date as part of the report submittal process and update as necessary.

  • The National Diffusion Tube Bias Adjustment Factors Spreadsheet March 2018 Update will be available shortly. The cut-off for the inclusion of co-location studies in the March 2018 update has now passed. We would like to thank all the local authorities who have already submitted their co-location study results. Local authorities can continue to return collocation studies for diffusion tubes for inclusion (pending data quality checks) in the June 2018 update.

28 February 2018

An updated version of the LAQM Technical Guidance LAQM.TG16 is now available. This supersedes all previous versions. The key updates are in response to the recent review of the Welsh LAQM framework, and therefore mainly apply to Welsh local authorities.

The update also includes a few other items of clarification and errata, which will apply to all regions, details of which are provided in TG16 Annex D: Log of Changes. Any questions regarding these changes should be directed to the LAQM Helpdesk.

LAQM templates for the 2018 reporting year are in the process of being finalised and will be published shortly. Further correspondence will be issued in due course, once available.

18 December 2017

An updated version of the Emissions Factors Toolkit EFT (v8.0.1) is now available. Version 8.0 should no longer be used. Version 8.0.1 addresses the following issues:

  • Bug fix to correct the bus and coach split on London roads when entering data using the Alternative Technologies traffic format input option only.
  • Bug fixes to allow compatibility with Excel 2007 and 64-bit instances of Excel.

Any users who are concerned about the identified issue with the bus/coach split in London when using Alternative Vehicles input option should contact the Helpdesk for further assistance.

The EFT User Guide (v2) has also been updated to reflect these changes.

13 November 2017

A number of updates have taken place on 13 November 2017. Please follow the links below for more information:

A full list of Tools is available here.

30 October 2017

The 2018 Diffusion Tube Monitoring Calendar, providing recommended exposure dates, is now available on the Diffusion Tube web page here.

10 October 2017

The Air Pollution in the UK 2016 report has been published. This is the latest in a long-running series of annual reports summarising measurements from the national air pollution monitoring networks, operated on behalf of Defra and the Devolved Administrations of Scotland, Wales and Northern Ireland. The report provides the most comprehensive and complete analytical picture of the UK's air pollution during the 2016 calendar year (January to December).

04 October 2017

The latest summaries of participating laboratories' performance in the AIR-PT scheme (formerly WASP), rounds 10 to 21, for NO2 diffusion tubes have  been added and are available here.

03 October 2017

The National Diffusion Tube Bias Adjustment Factors Spreadsheet September 2017 update is now available. The revised bias adjustment factors should be used for all new LAQM work; it is not necessary to update any work already underway with the revised factors. We would like to thank all the local authorities who submitted co-location study results. Local authorities can continue to return co-location studies for diffusion tubes for inclusion (pending data quality checks) in the next update which is due in March 2018. 

Click here to download the updated Adjustment Factors Spreadsheet. 

The associated summaries of NO2 Diffusion Tube lab precision have also been updated here.

23 June 2017

There is new statutory policy guidance on local air quality management in Wales, published following a recent public consultation. Click here to download the guidance.

The Welsh Government has also produced a new website where air pollution and environmental noise maps may be viewed at the same time

In addition, the National Diffusion Tube Bias Adjustment Factors Spreadsheet June 2017 update is now available. We would like to thank all the local authorities who submitted co-location study results. Local authorities can continue to return co-location studies for diffusion tubes for inclusion (pending data quality checks) in the next update which is due in September 2017. 

Click here to download the updated Adjustment Factors Spreadsheet.

The associated summaries of NO2 Diffusion Tube lab precision have also been updated here.

5 May 2017

Defra has today published for consultation a draft plan to improve air quality by reducing levels of nitrogen dioxide. The consultation closes on 15 June 2017.

Alongside the consultation, Defra has also published a Clean Air Zone Framework for England (principles which Local Authorities should follow when setting up Clean Air Zones) and a summary of responses to the ‘Implementation of Clean Air Zones in England' consultation.

10 April 2017

A minor revision to the National Diffusion Tube Bias Adjustment Factors Spreadsheet March 2017 (v2) is now available. Please use this in preference to version 1 of the sheet, released in March. 

We would like to thank all the local authorities who submitted co-location study results. Local authorities can continue to return co-location studies for diffusion tubes for inclusion (pending data quality checks) in the next update which is due in June 2017.

Click here to download the updated Adjustment Factors Spreadsheet.

The associated summaries of NO2 Diffusion Tube lab precision have also been updated here.

7 April 2017

A number of updates have taken place on 7 April 2017. Please follow the links below for more information.

  • The RSW system has been updated, allowing users to upload their 2017 LAQM Reports (registered users only). In addition to all statutory annual reports, Air Quality Action Plans should now be submitted via the updated RSW system for appraisal. Welsh language support is now also provided.

  • Management of AQMAs, including new declarations, amendments and/or revocations to existing AQMAs, should now be made via the ‘AQMAs’ section of the updated RSW system (registered users only). Local authorities are reminded to check their existing AQMA details for accuracy and will now need to confirm on an annual basis at the point of LAQM report submittal that all AQMA details are present and correct. This has to be completed before your report can be submitted.

  • 2017 LAQM Report Templates are now available. As per previous years, Regional Groups which include several authorities are able to submit combined reports. The main changes from previous reporting years are summarised below:

    • England (not London) ASR: To facilitate the completion of the ASR, a separate Excel based template is now provided, which mirrors the tables contained within this reporting template. Local authorities are now required to submit the Excel file with all relevant tables completed via the updated RSW system, in addition to the MS Word or PDF copy of the completed ASR. It is advised that local authorities complete the Excel based tables first, before then copying the completed tables in to the Word ASR template.
    • London ASR: This year, local authorities are required to complete Section 3 Planning Update and Other New Sources of Emissions. This information will be used to assess what is happening across London in terms of controlling emissions from new developments, and will help to inform the revision of the London Plan.
    • Scotland APR: Local authorities must now report on progress against any relevant Cleaner Air for Scotland actions (Section 2.3). There are two mandatory actions which will require commentary, namely Transport – Avoiding Travel (T1) and Climate Change – Effective Co-ordination of Climate Change and Air Quality Policies to Deliver Co-benefits (CC2). Commentary on further actions should be added as appropriate.
    • Wales and Northern Ireland PRs: No significant changes from previous years.

Completed reports should be submitted via the updated RSW system in line with the relevant report submission deadlines.

  • The following LAQM tools have been recently updated:
    • Biomass Emissions Screening Tool v7 – Now includes the ability to screen PM10 emissions from combined biomass combustion installations. The PM2.5 emissions component has also been updated to reflect the statutory objective in Scotland.
    • Industrial Emissions Screening Tool v3 – Where relevant, several of the emissions screening components have been consolidated in order to reduce the overall number of sheets. The PM10 emissions components have also been updated to reflect the present statutory objectives, as opposed to out-of-date proposed particle objectives upon which the previous screening calculator was based on.

A full List of Tools is available here.

31 March 2017

The National Diffusion Tube Bias Adjustment Factors Spreadsheet March 2017 update is now available. We would like to thank all the local authorities who submitted co-location study results. Local authorities can continue to return co-location studies for diffusion tubes for inclusion (pending data quality checks) in the next update which is due in June 2017. Click here to download the updated Adjustment Factors Spreadsheet.

The latest summaries of participating laboratories' performance in the AIR-PT scheme (formerly WASP) for NO2 diffusion tubes have also been added and are available here.

The summary of NO2 Diffusion Tube precision information has also been updated here.

1 March 2017

The Defra and Public Health England Briefing for Directors of Public Health (Air Pollution) toolkit was re-launched today. It provides advice on mitigating the impact of both short term and long term exposure of air pollution, as well as how Directors of Public Health should respond to make local communities aware of high air pollution episodes. Further information about public health can be found here.

6 October 2016

The Joint Air Quality Unit (Defra and DfT) launched the Air Quality Grant 2016-17 on October 6 2016, with an application deadline of noon November 23 2016. For more information on how to apply, visit FAQ 137.

14 July 2016

A number of updates have taken place on 14 July 2016. Please follow the links below for more information.

6 July 2016

The National Diffusion Tube Bias Adjustment Factors Spreadsheet June 2016 update is now available. We would like to thank all the local authorities who submitted co-location study results. Local authorities can continue to return co-location studies for diffusion tubes for inclusion (pending data quality checks) in the next update which is due in September 2016. Click here to download the updated Adjustment Factors Spreadsheet.

The summary of NO2 Diffusion Tube precision information has also been updated here.

10 June 2016

Please note that the Report Submission Website (RSW) has been updated, allowing users to upload their 2016 LAQM Report: Annual Status Report (ASR) for local authorities in England; Annual Progress Report (APR) in Scotland, and LAQM Progress Report in Wales and Northern Ireland.

London Boroughs, who are also required to prepare a separate Annual Summary Status Report (ASSR) alongside their ASR, should submit both reports via the RSW, which allows uploading several associated files before submitting a report.

The report templates for preparing the 2016 LAQM reports are available on the RSW. Alternatively, they can be downloaded on the Report Template LAQM webpage. London Boroughs can also access the relevant templates at https://www.london.gov.uk/what-we-do/environment/pollution-and-air-quality/working-boroughs.

8 April 2016

The following updates have taken place on 8 April 2016:

Please note that several of the supporting LAQM webpages and tools referred to in the Technical Guidance are still in the process of being finalised. These will be made available shortly and registered LAQM users duly notified. If you are not registered, you can do this by emailing us and we will add you to our list of users who want to receive updates about new content.

15 March 2016

The National Diffusion Tube Bias Adjustment Factors Spreadsheet March 2016 update is now available. We would like to thank all the local authorities who submitted co-location study results. Local authorities can continue to return co-location studies for diffusion tubes for inclusion (pending data quality checks) in the next update which is due in June 2016. Click here to download the updated Adjustment Factors Spreadsheet.

The latest summaries of participating laboratories' performance in the AIR-PT scheme (formerly WASP) for NO2 diffusion tubes have also been added and are available here.

The summary of NO2 Diffusion Tube precision information has been added here.

15 January 2016

The latest summaries of participating laboratories' performance in the AIR-PT scheme (formerly WASP) for NO2 diffusion tubes have been added and are available here.

6 January 2016

The questionnaire to add 2015 co-location data to the Diffusion Tube Bias Adjustment Factors Spreadsheet is now available. The closing date for submissions to be included in the March 2016 update is 29 February 2016. The questionnaire can be accessed here.

26 November 2015

Consultation on The Review of Local Air Quality Management: Changes to Guidance and Reporting is now open. The consultation, running until 21 January 2016, invites views on Government measures to improve delivery of LAQM in England.

18 November 2015

The 2016 Diffusion Tube Monitoring Calendar, providing recommended exposure dates, is now available on the Diffusion tube web page.

1 October 2015

The National Diffusion Tube Bias Adjustment Factors Spreadsheet September 2015 update is now available. We would like to thank all the local authorities who submitted co-location study results. Local authorities can continue to return co-location studies for diffusion tubes for inclusion (pending data quality checks) in the next update which is due in March 2016. Click here to download the updated Adjustment Factors Spreadsheet.

18 June 2015

The National Diffusion Tube Bias Adjustment Factors Spreadsheet June 2015 update is now available. We would like to thank all the local authorities who submitted co-location study results. Local authorities can continue to return co-location studies for diffusion tubes for inclusion (pending data quality checks) in the next update which is due in September 2015. Click here to download the updated Adjustment Factors Spreadsheet.

20 March 2015

The National Diffusion Tube Bias Adjustment Factors Spreadsheet March 2015 update is now available. We would like to thank all the local authorities who submitted co-location study results. Local authorities can continue to return co-location studies for diffusion tubes for inclusion (pending data quality checks) in the next update which is due in June 2015. Click hereto download the updated Adjustment Factors Spreadsheet.

The latest summaries of participating laboratories' performance in the AIR-PT scheme (formerly WASP) for NO2 diffusion tubes have also been added and are available here.

16 February 2015

The 2015 Updating and Screening Assessment (USA) template is now available and should be used for LAQM USAs due to be submitted in April 2015. To simplify the reporting process, a separate template is available for Regional Groups (England). Click here to download the appropriate template for your region / group.

1 December 2014

The 2015 Diffusion Tube Monitoring Calendar, providing recommended exposure dates, is now available on the Diffusion tube web page.

An updated version of the Emissions Factors Toolkit EFT (v6.0.2) is now available. Version 6.0.1 should no longer be used. Version 6.0.2 addresses the following issues:

  • An error in the outputs of g/km/s and kg/year when running the Alternative Vehicles advanced input option. Emissions factors outputs as g/km are NOT affected.
  • A runtime error which affected running the Basic Inputs option for 100% HDV.

Any users who are concerned about the errors in the Alternative Vehicles should contact the Helpdesk for further assistance.

The EFT User Guide (v1.2) has also been updated to reflect these changes.

1 October 2014

The National Diffusion Tube Bias Adjustment Factors Spreadsheet September 2014 update is now available to download from https://laqm.defra.gov.uk/bias-adjustment-factors/national-bias.html. We would like to thank all the local authorities who submitted co-location study results. Local authorities can continue to return co-location studies for diffusion tubes for inclusion (pending data quality checks) in the next update which is due in March 2015.

2 July 2014

The following updates have taken place on 2 July 2014:

19 June 2014

A number of updates have taken place on 19 June 2014. Please follow the links below for more information.

  • This also includes minor updates to the LAQM TG(09) online viewer and downloadable version - see Annex 5 Log of Changes within LAQM TG(09) for more information.

27th September 2013

The National Diffusion Tube Bias Adjustment Factors Spreadsheet September 2013 update is now available to download from https://laqm.defra.gov.uk/bias-adjustment-factors/national-bias.html. We would like to thank all the local authorities who submitted co-location study results. The next update is due in March 2014.

8th July 2013

A new Section about Public Health Impacts and Local Actions has been added to the bottom of the Main Menu. This Section provides a briefing to inform public health professionals of the public health impacts of air pollution, the sources of air pollution and measures available to reduce air pollution. This new Section can also be accessed using this link https://laqm.defra.gov.uk/public-health/.

24th June 2013

The National Diffusion Tube Bias Adjustment Factors Spreadsheet June 2013 update is now available to download from https://laqm.defra.gov.uk/bias-adjustment-factors/national-bias.html. We would like to thank all the local authorities who submitted co-location study results. Local authorities can continue to return co-location studies for diffusion tubes for inclusion (pending data quality checks) in the next update which is due in September 2013.

The Diffusion Tube Monitoring Calendar available at https://laqm.defra.gov.uk/diffusion-tubes/data-entry.html has also been amended to account for bank holidays.

21st May 2013

Local Authorities are reminded to return co-location studies for diffusion tubes by the 12th June 2013 for inclusion (pending data quality checks) in the next National Bias Adjustment Spreadsheet due at the end of June 2013. Click here for more information.

You may have previously submitted data for the last update in March where the automatic data was classified as “provisional” and this classification may now have changed to “ratified”. If the concentration values are substantially different then you have the opportunity to resubmit an amended report. Please make it clear in the covering email that you are submitting a replacement.

21st March 2013

The National Diffusion Tube Bias Adjustment Factors Spreadsheet March 2013 update is now available to download from https://laqm.defra.gov.uk/bias-adjustment-factors/national-bias.html. We would like to thank all the local authorities who submitted co-location study results. Local authorities can continue to return co-location studies for diffusion tubes for inclusion (pending data quality checks) in the next update which is due in June 2013.

13th February 2013

  • Local Authorities are reminded to return co-location studies for diffusion tubes by Wednesday 6thMarch 2013 for inclusion (pending data quality checks) in the next National Bias Adjustment Spreadsheet due in March 2013. Click here for more information.
  • The new version of the AQMA website is now online at http://aqma.defra.gov.uk. This provides the location of all AQMAs and summary tables of AQMAs by pollutant and region. It also now allows users to provide information on declared, amended and revoked AQMAs in their authority area, which will ensure the website is up-to-date with the latest changes in AQMAs across the UK.
  • The NO2 Diffusion Tube Data Centre is now available at https://laqm.defra.gov.uk/diffusion-tubes/datacentre.php. This website is a resource for local authorities (in England) to store and present Diffusion Tube results to members of the public and other interested parties. Site information, raw annual and monthly results are available and download of data files of raw monthly concentrations is possible. Site information and data can be added by local authority officers using the password protected Data Entry System, available at https://laqm.defra.gov.uk/dtdes, which provides an interactive system for precise location of monitoring sites and a simple mechanism for upload of bulk sets of diffusion tube data.

12th November 2012

The 2013 Diffusion Tube Monitoring Calendar, providing recommended exposure dates, is now available on the Diffusion tube web page.

31st August 2012

A number of updates to LAQM Tools have taken place on 31st August 2012. Please follow the links below for more information.

2010 based background maps for years 2010-2030 for NOx, NO2, PM10 and PM2.5 are now available.

Users should note that 2011 based background maps are anticipated to be available in early 2013, at which time the 2010 based background maps will be replaced. The 2010 based background maps are calibrated against monitoring data for 2010 and it is now widely recognised that elevated NO2 concentrations during 2010 mean that the resulting projected background concentrations for NOx/NO2 within these maps may be higher than would be expected.

This page provides information on how the new 2010 based maps have been calculated, along with temporary advice f