Statistical data set
Figure 7: Annual mean hours when PM10 pollution was ‘Moderate’ or higher, for roadside sites, 1997 to 2023
Updated 30 April 2024
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| Site type | Year | Number of sites | Daily Air Quality Index | Mean number of hours per site |
|---|---|---|---|---|
| Urban Traffic | 1997 | 4 | mod_4 | 577.25 |
| Urban Traffic | 1998 | 7 | mod_4 | 460.4285714 |
| Urban Traffic | 1999 | 7 | mod_4 | 432.1428571 |
| Urban Traffic | 2000 | 7 | mod_4 | 461.8571429 |
| Urban Traffic | 2001 | 7 | mod_4 | 404.7142857 |
| Urban Traffic | 2002 | 7 | mod_4 | 416 |
| Urban Traffic | 2003 | 7 | mod_4 | 625.1428571 |
| Urban Traffic | 2004 | 7 | mod_4 | 455.5714286 |
| Urban Traffic | 2005 | 7 | mod_4 | 455.2857143 |
| Urban Traffic | 2006 | 7 | mod_4 | 577 |
| Urban Traffic | 2007 | 6 | mod_4 | 431.5 |
| Urban Traffic | 2008 | 11 | mod_4 | 158.4545455 |
| Urban Traffic | 2009 | 14 | mod_4 | 104.0714286 |
| Urban Traffic | 2010 | 14 | mod_4 | 120.3571429 |
| Urban Traffic | 2011 | 13 | mod_4 | 224.3846154 |
| Urban Traffic | 2012 | 16 | mod_4 | 125.25 |
| Urban Traffic | 2013 | 13 | mod_4 | 108.4615385 |
| Urban Traffic | 2014 | 13 | mod_4 | 96.69230769 |
| Urban Traffic | 2015 | 18 | mod_4 | 72.05555556 |
| Urban Traffic | 2016 | 23 | mod_4 | 58.69565217 |
| Urban Traffic | 2017 | 27 | mod_4 | 62.59259259 |
| Urban Traffic | 2018 | 30 | mod_4 | 42.23333333 |
| Urban Traffic | 2019 | 37 | mod_4 | 81.02702703 |
| Urban Traffic | 2020 | 35 | mod_4 | 23.54285714 |
| Urban Traffic | 2021 | 33 | mod_4 | 28.57575758 |
| Urban Traffic | 2022 | 35 | mod_4 | 48.97142857 |
| Urban Traffic | 2023 | 36 | mod_4 | 26.63888889 |
| Urban Traffic | 1997 | 4 | mod_5 | 305 |
| Urban Traffic | 1998 | 7 | mod_5 | 255.8571429 |
| Urban Traffic | 1999 | 7 | mod_5 | 224.2857143 |
| Urban Traffic | 2000 | 7 | mod_5 | 259.8571429 |
| Urban Traffic | 2001 | 7 | mod_5 | 183 |
| Urban Traffic | 2002 | 7 | mod_5 | 191.1428571 |
| Urban Traffic | 2003 | 7 | mod_5 | 403.5714286 |
| Urban Traffic | 2004 | 7 | mod_5 | 196.2857143 |
| Urban Traffic | 2005 | 7 | mod_5 | 225.5714286 |
| Urban Traffic | 2006 | 7 | mod_5 | 334.5714286 |
| Urban Traffic | 2007 | 6 | mod_5 | 243 |
| Urban Traffic | 2008 | 11 | mod_5 | 71.81818182 |
| Urban Traffic | 2009 | 14 | mod_5 | 57.35714286 |
| Urban Traffic | 2010 | 14 | mod_5 | 59.57142857 |
| Urban Traffic | 2011 | 13 | mod_5 | 115.6153846 |
| Urban Traffic | 2012 | 16 | mod_5 | 74.1875 |
| Urban Traffic | 2013 | 13 | mod_5 | 60 |
| Urban Traffic | 2014 | 13 | mod_5 | 45.07692308 |
| Urban Traffic | 2015 | 18 | mod_5 | 39.22222222 |
| Urban Traffic | 2016 | 23 | mod_5 | 28.04347826 |
| Urban Traffic | 2017 | 27 | mod_5 | 30.11111111 |
| Urban Traffic | 2018 | 30 | mod_5 | 14.8 |
| Urban Traffic | 2019 | 37 | mod_5 | 43.27027027 |
| Urban Traffic | 2020 | 35 | mod_5 | 6.942857143 |
| Urban Traffic | 2021 | 33 | mod_5 | 9.848484848 |
| Urban Traffic | 2022 | 35 | mod_5 | 26.74285714 |
| Urban Traffic | 2023 | 36 | mod_5 | 11 |
| Urban Traffic | 1997 | 4 | mod_6 | 175.5 |
| Urban Traffic | 1998 | 7 | mod_6 | 124.8571429 |
| Urban Traffic | 1999 | 7 | mod_6 | 107 |
| Urban Traffic | 2000 | 7 | mod_6 | 85.42857143 |
| Urban Traffic | 2001 | 7 | mod_6 | 92.57142857 |
| Urban Traffic | 2002 | 7 | mod_6 | 77.71428571 |
| Urban Traffic | 2003 | 7 | mod_6 | 239 |
| Urban Traffic | 2004 | 7 | mod_6 | 91.14285714 |
| Urban Traffic | 2005 | 7 | mod_6 | 93.85714286 |
| Urban Traffic | 2006 | 7 | mod_6 | 171.7142857 |
| Urban Traffic | 2007 | 6 | mod_6 | 111.1666667 |
| Urban Traffic | 2008 | 11 | mod_6 | 35.18181818 |
| Urban Traffic | 2009 | 14 | mod_6 | 24.78571429 |
| Urban Traffic | 2010 | 14 | mod_6 | 30.42857143 |
| Urban Traffic | 2011 | 13 | mod_6 | 83.23076923 |
| Urban Traffic | 2012 | 16 | mod_6 | 41.125 |
| Urban Traffic | 2013 | 13 | mod_6 | 36.15384615 |
| Urban Traffic | 2014 | 13 | mod_6 | 30.61538462 |
| Urban Traffic | 2015 | 18 | mod_6 | 14.5 |
| Urban Traffic | 2016 | 23 | mod_6 | 20.52173913 |
| Urban Traffic | 2017 | 27 | mod_6 | 12.88888889 |
| Urban Traffic | 2018 | 30 | mod_6 | 5.2 |
| Urban Traffic | 2019 | 37 | mod_6 | 30.32432432 |
| Urban Traffic | 2020 | 35 | mod_6 | 6.114285714 |
| Urban Traffic | 2021 | 33 | mod_6 | 2.060606061 |
| Urban Traffic | 2022 | 35 | mod_6 | 14.54285714 |
| Urban Traffic | 2023 | 36 | mod_6 | 3.833333333 |
| Urban Traffic | 1997 | 4 | high_7 | 126.75 |
| Urban Traffic | 1998 | 7 | high_7 | 58.28571429 |
| Urban Traffic | 1999 | 7 | high_7 | 30.42857143 |
| Urban Traffic | 2000 | 7 | high_7 | 32.71428571 |
| Urban Traffic | 2001 | 7 | high_7 | 44 |
| Urban Traffic | 2002 | 7 | high_7 | 20.57142857 |
| Urban Traffic | 2003 | 7 | high_7 | 130.5714286 |
| Urban Traffic | 2004 | 7 | high_7 | 25.85714286 |
| Urban Traffic | 2005 | 7 | high_7 | 37.85714286 |
| Urban Traffic | 2006 | 7 | high_7 | 54.71428571 |
| Urban Traffic | 2007 | 6 | high_7 | 55.5 |
| Urban Traffic | 2008 | 11 | high_7 | 18.18181818 |
| Urban Traffic | 2009 | 14 | high_7 | 7.285714286 |
| Urban Traffic | 2010 | 14 | high_7 | 14 |
| Urban Traffic | 2011 | 13 | high_7 | 37.23076923 |
| Urban Traffic | 2012 | 16 | high_7 | 20 |
| Urban Traffic | 2013 | 13 | high_7 | 10.30769231 |
| Urban Traffic | 2014 | 13 | high_7 | 13.92307692 |
| Urban Traffic | 2015 | 18 | high_7 | 1.111111111 |
| Urban Traffic | 2016 | 23 | high_7 | 11.69565217 |
| Urban Traffic | 2017 | 27 | high_7 | 3.481481481 |
| Urban Traffic | 2018 | 30 | high_7 | 2 |
| Urban Traffic | 2019 | 37 | high_7 | 6.162162162 |
| Urban Traffic | 2020 | 35 | high_7 | 2.628571429 |
| Urban Traffic | 2021 | 33 | high_7 | 0.363636364 |
| Urban Traffic | 2022 | 35 | high_7 | 4.228571429 |
| Urban Traffic | 2023 | 36 | high_7 | 0.722222222 |
| Urban Traffic | 1997 | 4 | high_8 | 69.25 |
| Urban Traffic | 1998 | 7 | high_8 | 32.85714286 |
| Urban Traffic | 1999 | 7 | high_8 | 14 |
| Urban Traffic | 2000 | 7 | high_8 | 21.57142857 |
| Urban Traffic | 2001 | 7 | high_8 | 27.57142857 |
| Urban Traffic | 2002 | 7 | high_8 | 17 |
| Urban Traffic | 2003 | 7 | high_8 | 62.42857143 |
| Urban Traffic | 2004 | 7 | high_8 | 8.857142857 |
| Urban Traffic | 2005 | 7 | high_8 | 13.85714286 |
| Urban Traffic | 2006 | 7 | high_8 | 29.57142857 |
| Urban Traffic | 2007 | 6 | high_8 | 38.16666667 |
| Urban Traffic | 2008 | 11 | high_8 | 14.90909091 |
| Urban Traffic | 2009 | 14 | high_8 | 2.5 |
| Urban Traffic | 2010 | 14 | high_8 | 8.285714286 |
| Urban Traffic | 2011 | 13 | high_8 | 18.84615385 |
| Urban Traffic | 2012 | 16 | high_8 | 6.5625 |
| Urban Traffic | 2013 | 13 | high_8 | 3.461538462 |
| Urban Traffic | 2014 | 13 | high_8 | 6.923076923 |
| Urban Traffic | 2015 | 18 | high_8 | 0.111111111 |
| Urban Traffic | 2016 | 23 | high_8 | 4.913043478 |
| Urban Traffic | 2017 | 27 | high_8 | 1.888888889 |
| Urban Traffic | 2018 | 30 | high_8 | 0.666666667 |
| Urban Traffic | 2019 | 37 | high_8 | 1.054054054 |
| Urban Traffic | 2020 | 35 | high_8 | 2.114285714 |
| Urban Traffic | 2021 | 33 | high_8 | 0.333333333 |
| Urban Traffic | 2022 | 35 | high_8 | 2.857142857 |
| Urban Traffic | 2023 | 36 | high_8 | 0 |
| Urban Traffic | 1997 | 4 | high_9 | 68.5 |
| Urban Traffic | 1998 | 7 | high_9 | 13 |
| Urban Traffic | 1999 | 7 | high_9 | 8.142857143 |
| Urban Traffic | 2000 | 7 | high_9 | 6.857142857 |
| Urban Traffic | 2001 | 7 | high_9 | 22.14285714 |
| Urban Traffic | 2002 | 7 | high_9 | 7.428571429 |
| Urban Traffic | 2003 | 7 | high_9 | 27.28571429 |
| Urban Traffic | 2004 | 7 | high_9 | 1.714285714 |
| Urban Traffic | 2005 | 7 | high_9 | 0.571428571 |
| Urban Traffic | 2006 | 7 | high_9 | 18.14285714 |
| Urban Traffic | 2007 | 6 | high_9 | 25 |
| Urban Traffic | 2008 | 11 | high_9 | 8.545454545 |
| Urban Traffic | 2009 | 14 | high_9 | 1.071428571 |
| Urban Traffic | 2010 | 14 | high_9 | 4.5 |
| Urban Traffic | 2011 | 13 | high_9 | 10.53846154 |
| Urban Traffic | 2012 | 16 | high_9 | 2 |
| Urban Traffic | 2013 | 13 | high_9 | 1.615384615 |
| Urban Traffic | 2014 | 13 | high_9 | 3.230769231 |
| Urban Traffic | 2015 | 18 | high_9 | 1 |
| Urban Traffic | 2016 | 23 | high_9 | 1.869565217 |
| Urban Traffic | 2017 | 27 | high_9 | 1.925925926 |
| Urban Traffic | 2018 | 30 | high_9 | 0.066666667 |
| Urban Traffic | 2019 | 37 | high_9 | 0 |
| Urban Traffic | 2020 | 35 | high_9 | 0.285714286 |
| Urban Traffic | 2021 | 33 | high_9 | 0 |
| Urban Traffic | 2022 | 35 | high_9 | 1.057142857 |
| Urban Traffic | 2023 | 36 | high_9 | 0 |
| Urban Traffic | 1997 | 4 | vhigh_10 | 49.75 |
| Urban Traffic | 1998 | 7 | vhigh_10 | 30.14285714 |
| Urban Traffic | 1999 | 7 | vhigh_10 | 35.28571429 |
| Urban Traffic | 2000 | 7 | vhigh_10 | 8.714285714 |
| Urban Traffic | 2001 | 7 | vhigh_10 | 47.28571429 |
| Urban Traffic | 2002 | 7 | vhigh_10 | 10.42857143 |
| Urban Traffic | 2003 | 7 | vhigh_10 | 12.57142857 |
| Urban Traffic | 2004 | 7 | vhigh_10 | 0 |
| Urban Traffic | 2005 | 7 | vhigh_10 | 2.571428571 |
| Urban Traffic | 2006 | 7 | vhigh_10 | 11 |
| Urban Traffic | 2007 | 6 | vhigh_10 | 15.83333333 |
| Urban Traffic | 2008 | 11 | vhigh_10 | 2 |
| Urban Traffic | 2009 | 14 | vhigh_10 | 0 |
| Urban Traffic | 2010 | 14 | vhigh_10 | 8.357142857 |
| Urban Traffic | 2011 | 13 | vhigh_10 | 6.076923077 |
| Urban Traffic | 2012 | 16 | vhigh_10 | 0.9375 |
| Urban Traffic | 2013 | 13 | vhigh_10 | 0 |
| Urban Traffic | 2014 | 13 | vhigh_10 | 3.230769231 |
| Urban Traffic | 2015 | 18 | vhigh_10 | 1.333333333 |
| Urban Traffic | 2016 | 23 | vhigh_10 | 0 |
| Urban Traffic | 2017 | 27 | vhigh_10 | 3.407407407 |
| Urban Traffic | 2018 | 30 | vhigh_10 | 0 |
| Urban Traffic | 2019 | 37 | vhigh_10 | 0 |
| Urban Traffic | 2020 | 35 | vhigh_10 | 0.457142857 |
| Urban Traffic | 2021 | 33 | vhigh_10 | 0 |
| Urban Traffic | 2022 | 35 | vhigh_10 | 0.285714286 |
| Urban Traffic | 2023 | 36 | vhigh_10 | 0 |