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Statistical data set

Figure 13: Annual mean concentrations of O3 in the UK, 1987 to 2024

Updated 26 June 2025

锘縎ite type Year Mean daily maximum 8-hour mean concentration of ozone (碌g/m3) 95% confidence interval for 'All sites' (+/-) Number of sites
Rural Background 1987 55.73371991 6.721002491 5
Rural Background 1988 65.64981285 4.659026534 12
Rural Background 1989 67.86464614 4.972930965 14
Rural Background 1990 69.71884823 4.508190549 15
Rural Background 1991 66.79427101 4.455004374 12
Rural Background 1992 67.8641859 5.035280424 14
Rural Background 1993 65.21502892 5.309471716 14
Rural Background 1994 69.38386976 3.869373646 14
Rural Background 1995 70.04185377 3.851553623 15
Rural Background 1996 66.70551436 3.360383385 15
Rural Background 1997 65.87804203 3.291996423 15
Rural Background 1998 68.05100491 3.233699123 17
Rural Background 1999 72.206833 2.941632471 17
Rural Background 2000 67.16857708 2.901309375 15
Rural Background 2001 66.1410939 3.111451539 16
Rural Background 2002 66.95493096 3.061101679 18
Rural Background 2003 73.12097243 3.141220033 19
Rural Background 2004 71.90554171 2.697010939 19
Rural Background 2005 69.58880415 3.175932237 20
Rural Background 2006 73.86120991 3.185508689 21
Rural Background 2007 67.68682327 2.366239859 20
Rural Background 2008 69.824075 2.776703724 20
Rural Background 2009 67.63642721 2.662142188 22
Rural Background 2010 67.06291308 2.418050673 21
Rural Background 2011 67.96161796 2.26018005 22
Rural Background 2012 65.76109515 2.326102709 21
Rural Background 2013 68.98841077 2.201390628 21
Rural Background 2014 69.45663651 2.374208316 22
Rural Background 2015 71.13813047 1.880882468 22
Rural Background 2016 67.2424137 2.002794644 22
Rural Background 2017 69.16667566 2.244808449 20
Rural Background 2018 72.44044154 1.817804972 20
Rural Background 2019 71.61775258 2.206773699 19
Rural Background 2020 71.58003089 1.985694735 19
Rural Background 2021 70.59296826 1.546363826 18
Rural Background 2022 73.92458944 1.937533101 18
Rural Background 2023 73.20816421 1.878445773 20
Rural Background 2024 71.13795008 1.730138562 21
Urban Background 1992 39.92073153 12.5257199 4
Urban Background 1993 40.17707732 4.829714791 8
Urban Background 1994 47.42963988 3.260083886 13
Urban Background 1995 50.59969072 4.459544977 12
Urban Background 1996 45.92245964 2.793073475 18
Urban Background 1997 45.25629241 2.475751401 30
Urban Background 1998 48.45682457 2.321349119 42
Urban Background 1999 55.61305353 2.437577151 42
Urban Background 2000 52.18608936 2.420435619 41
Urban Background 2001 51.53686697 2.083010892 43
Urban Background 2002 52.65908147 2.282995545 45
Urban Background 2003 59.10313252 2.320678062 47
Urban Background 2004 56.54815639 2.392868156 50
Urban Background 2005 56.16364593 2.260301709 49
Urban Background 2006 60.72603455 2.445470962 48
Urban Background 2007 56.36195477 2.216519144 45
Urban Background 2008 58.92250747 2.653131653 43
Urban Background 2009 54.77306867 2.824474435 41
Urban Background 2010 51.94562047 2.450785606 42
Urban Background 2011 57.07709119 2.499086196 43
Urban Background 2012 55.05226443 1.891500184 42
Urban Background 2013 59.20267252 2.264195061 41
Urban Background 2014 59.93868088 2.347322533 42
Urban Background 2015 60.82366233 2.017577087 42
Urban Background 2016 55.91776665 2.081088477 41
Urban Background 2017 58.05640199 2.256589299 41
Urban Background 2018 62.77388335 2.001620902 42
Urban Background 2019 61.19443647 2.181379282 39
Urban Background 2020 64.41525643 1.812746134 39
Urban Background 2021 62.53374029 1.622969629 38
Urban Background 2022 65.01646011 1.647930626 40
Urban Background 2023 66.90217949 1.191048603 51
Urban Background 2024 66.0804281 1.114788454 60