Bulletins Site Details Statistics Pollution Episodes

Air Quality Statistics: 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 (to date) Your selected monitoring site » Croydon - Norbury Site operated by » Croydon The table below shows whether pollution levels recorded at the site you have selected remained within the Government's Air Quality Strategy Objectives in 2020. For further basic statistics click on the button below, or for more precise statistics, use the Statistics Calculator. Pollutant Objective Was it achieved? Value 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 YES 35 * Note that all objectives have been calculated using a method defined in 2013. * Note that results are excluded where analysers have not returned valid data for at least 90% of the year, unless a short-term objective was exceeded. * Note that this information is calculated twice daily, so may not reflect the latest data. Basic Stats Reports Wind Plot Annual Summary