LAQN Monitoring Sites

2007 Air Quality Strategy Objective Statistics: Daily mean PM₁₀ Objective (no. of days)

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Bulletins Site Details Statistics Pollution Episodes

Your selected monitoring site » Barnet - Tally Ho Corner Air Quality Statistics: 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 (to date) The table below shows whether pollution levels recorded at the site you have selected remained within the Government's Air Quality Strategy Objectives in 2007. For further basic statistics click on the button below, or for more precise statistics, use the Statistics Calculator. Pollutant Objective Was it achieved? Value PM10 Particulate No. days 24hr mean >50ug/m3 YES 15 PM10 (redundant method) No. days 24hr mean >50ug/m3 YES 12 The currently selected objective » PM10: 50 ug/m3 not be exceeded more than 35 times a year - measured as 24 hour mean * Note that results are excluded where analysers have not returned valid data for at least 75% of the year. * Note - all results from TEOM PM10 analysers from 2004 onward are now converted to reference equiavlence using the volatile correction method. Results using the old 'TEOM*1.3' method are also shown for comparison where relevant. More information. Basic Stats Reports Wind Plot Change objective: all objectives annual mean nitrogen dioxide objective hourly mean nitrogen dioxide objective (no. of hours) annual mean PM10 objective daily mean PM10 objective (no. of days) 15 minute mean sulphur dioxide objective hourly mean sulphur dioxide objective daily mean sulphur dioxide objective rolling 8 hour mean ozone objective rolling 8 hour mean carbon monoxide objective