LAQN Monitoring Statistics




Achieving Achieving but raised Exceeding No Data Closed
Achieving Achieving but raised Execeeding No Data Closed
What are the AQS Objectives?
Your selected monitoring site » Westminster - Oxford Street
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The table below shows whether pollution levels recorded at the site you have selected remained within the Government's Air Quality Strategy Objectives in 2019 (to date). For further basic statistics click on the button below, or for more precise statistics, use the Statistics Calculator.
Pollutant Objective Is it achieving? Value
PM10 Particulate 40 ug/m3 as an annual mean YES 28
PM10 Particulate 50 ug/m3 as a 24 hour mean, not to be exceeded more than 35 times a year YES 17
PM10 (redundant method) 40 ug/m3 as an annual mean YES 29
PM10 (redundant method) 50 ug/m3 as a 24 hour mean, not to be exceeded more than 35 times a year YES 18
Nitrogen Dioxide 200 ug/m3 as a 1 hour mean, not to be exceeded more than 18 times a year YES 0
Nitrogen Dioxide 40 ug/m3 as an annual mean NO 53
* Note that all objectives have been calculated using a method defined in 2013.
* Note that these results cover from the start of the year to now, and are still subject to change until the end of the year. Annual means can only be assessed at the end of the year, and any figures indicate current progress only. Figures for the current year do not take data capture rate into account.
* Note - all results from TEOM PM10 analysers from 2004 onward are now converted to reference equivalence using the volatile correction method. Results using the old 'TEOM*1.3' method are also shown for comparison where relevant. More information.
* Note that this information is calculated twice daily, so may not reflect the latest data.
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