Statistical data set
Figure 7: Annual mean hours when PM10 pollution was 鈥楳oderate鈥� or higher, for roadside sites, 1997 to 2025
Updated 30 June 2026
| 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 | 460.42857142857144 |
| Urban Traffic | 1999 | 7 | mod_4 | 432.14285714285717 |
| Urban Traffic | 2000 | 7 | mod_4 | 461.85714285714283 |
| Urban Traffic | 2001 | 7 | mod_4 | 404.7142857142857 |
| Urban Traffic | 2002 | 7 | mod_4 | 416 |
| Urban Traffic | 2003 | 7 | mod_4 | 625.1428571428571 |
| Urban Traffic | 2004 | 7 | mod_4 | 455.57142857142856 |
| Urban Traffic | 2005 | 7 | mod_4 | 455.2857142857143 |
| Urban Traffic | 2006 | 7 | mod_4 | 577 |
| Urban Traffic | 2007 | 6 | mod_4 | 431.5 |
| Urban Traffic | 2008 | 11 | mod_4 | 158.45454545454547 |
| Urban Traffic | 2009 | 14 | mod_4 | 104.07142857142857 |
| Urban Traffic | 2010 | 14 | mod_4 | 120.35714285714286 |
| Urban Traffic | 2011 | 13 | mod_4 | 224.3846153846154 |
| Urban Traffic | 2012 | 16 | mod_4 | 125.25 |
| Urban Traffic | 2013 | 13 | mod_4 | 108.46153846153847 |
| Urban Traffic | 2014 | 13 | mod_4 | 96.6923076923077 |
| Urban Traffic | 2015 | 18 | mod_4 | 72.05555555555556 |
| Urban Traffic | 2016 | 23 | mod_4 | 58.69565217391305 |
| Urban Traffic | 2017 | 27 | mod_4 | 62.592592592592595 |
| Urban Traffic | 2018 | 30 | mod_4 | 42.233333333333334 |
| Urban Traffic | 2019 | 37 | mod_4 | 81.02702702702703 |
| Urban Traffic | 2020 | 35 | mod_4 | 23.542857142857144 |
| Urban Traffic | 2021 | 33 | mod_4 | 28.575757575757574 |
| Urban Traffic | 2022 | 35 | mod_4 | 48.97142857142857 |
| Urban Traffic | 2023 | 36 | mod_4 | 26.63888888888889 |
| Urban Traffic | 2024 | 36 | mod_4 | 14.416666666666666 |
| Urban Traffic | 2025 | 40 | mod_4 | 42.275 |
| Urban Traffic | 1997 | 4 | mod_5 | 305 |
| Urban Traffic | 1998 | 7 | mod_5 | 255.85714285714286 |
| Urban Traffic | 1999 | 7 | mod_5 | 224.28571428571428 |
| Urban Traffic | 2000 | 7 | mod_5 | 259.85714285714283 |
| Urban Traffic | 2001 | 7 | mod_5 | 183 |
| Urban Traffic | 2002 | 7 | mod_5 | 191.14285714285714 |
| Urban Traffic | 2003 | 7 | mod_5 | 403.57142857142856 |
| Urban Traffic | 2004 | 7 | mod_5 | 196.28571428571428 |
| Urban Traffic | 2005 | 7 | mod_5 | 225.57142857142858 |
| Urban Traffic | 2006 | 7 | mod_5 | 334.57142857142856 |
| Urban Traffic | 2007 | 6 | mod_5 | 243 |
| Urban Traffic | 2008 | 11 | mod_5 | 71.81818181818181 |
| Urban Traffic | 2009 | 14 | mod_5 | 57.357142857142854 |
| Urban Traffic | 2010 | 14 | mod_5 | 59.57142857142857 |
| Urban Traffic | 2011 | 13 | mod_5 | 115.61538461538461 |
| Urban Traffic | 2012 | 16 | mod_5 | 74.1875 |
| Urban Traffic | 2013 | 13 | mod_5 | 60 |
| Urban Traffic | 2014 | 13 | mod_5 | 45.07692307692308 |
| Urban Traffic | 2015 | 18 | mod_5 | 39.22222222222222 |
| Urban Traffic | 2016 | 23 | mod_5 | 28.043478260869566 |
| Urban Traffic | 2017 | 27 | mod_5 | 30.11111111111111 |
| Urban Traffic | 2018 | 30 | mod_5 | 14.8 |
| Urban Traffic | 2019 | 37 | mod_5 | 43.270270270270274 |
| Urban Traffic | 2020 | 35 | mod_5 | 6.942857142857143 |
| Urban Traffic | 2021 | 33 | mod_5 | 9.848484848484848 |
| Urban Traffic | 2022 | 35 | mod_5 | 26.742857142857144 |
| Urban Traffic | 2023 | 36 | mod_5 | 11 |
| Urban Traffic | 2024 | 36 | mod_5 | 5.416666666666667 |
| Urban Traffic | 2025 | 40 | mod_5 | 19.375 |
| Urban Traffic | 1997 | 4 | mod_6 | 175.5 |
| Urban Traffic | 1998 | 7 | mod_6 | 124.85714285714286 |
| Urban Traffic | 1999 | 7 | mod_6 | 107 |
| Urban Traffic | 2000 | 7 | mod_6 | 85.42857142857143 |
| Urban Traffic | 2001 | 7 | mod_6 | 92.57142857142857 |
| Urban Traffic | 2002 | 7 | mod_6 | 77.71428571428571 |
| Urban Traffic | 2003 | 7 | mod_6 | 239 |
| Urban Traffic | 2004 | 7 | mod_6 | 91.14285714285714 |
| Urban Traffic | 2005 | 7 | mod_6 | 93.85714285714286 |
| Urban Traffic | 2006 | 7 | mod_6 | 171.71428571428572 |
| Urban Traffic | 2007 | 6 | mod_6 | 111.16666666666667 |
| Urban Traffic | 2008 | 11 | mod_6 | 35.18181818181818 |
| Urban Traffic | 2009 | 14 | mod_6 | 24.785714285714285 |
| Urban Traffic | 2010 | 14 | mod_6 | 30.428571428571427 |
| Urban Traffic | 2011 | 13 | mod_6 | 83.23076923076923 |
| Urban Traffic | 2012 | 16 | mod_6 | 41.125 |
| Urban Traffic | 2013 | 13 | mod_6 | 36.15384615384615 |
| Urban Traffic | 2014 | 13 | mod_6 | 30.615384615384617 |
| Urban Traffic | 2015 | 18 | mod_6 | 14.5 |
| Urban Traffic | 2016 | 23 | mod_6 | 20.52173913043478 |
| Urban Traffic | 2017 | 27 | mod_6 | 12.88888888888889 |
| Urban Traffic | 2018 | 30 | mod_6 | 5.2 |
| Urban Traffic | 2019 | 37 | mod_6 | 30.324324324324323 |
| Urban Traffic | 2020 | 35 | mod_6 | 6.114285714285714 |
| Urban Traffic | 2021 | 33 | mod_6 | 2.0606060606060606 |
| Urban Traffic | 2022 | 35 | mod_6 | 14.542857142857143 |
| Urban Traffic | 2023 | 36 | mod_6 | 3.8333333333333335 |
| Urban Traffic | 2024 | 36 | mod_6 | 1.75 |
| Urban Traffic | 2025 | 40 | mod_6 | 6.05 |
| Urban Traffic | 1997 | 4 | high_7 | 126.75 |
| Urban Traffic | 1998 | 7 | high_7 | 58.285714285714285 |
| Urban Traffic | 1999 | 7 | high_7 | 30.428571428571427 |
| Urban Traffic | 2000 | 7 | high_7 | 32.714285714285715 |
| Urban Traffic | 2001 | 7 | high_7 | 44 |
| Urban Traffic | 2002 | 7 | high_7 | 20.571428571428573 |
| Urban Traffic | 2003 | 7 | high_7 | 130.57142857142858 |
| Urban Traffic | 2004 | 7 | high_7 | 25.857142857142858 |
| Urban Traffic | 2005 | 7 | high_7 | 37.857142857142854 |
| Urban Traffic | 2006 | 7 | high_7 | 54.714285714285715 |
| Urban Traffic | 2007 | 6 | high_7 | 55.5 |
| Urban Traffic | 2008 | 11 | high_7 | 18.181818181818183 |
| Urban Traffic | 2009 | 14 | high_7 | 7.285714285714286 |
| Urban Traffic | 2010 | 14 | high_7 | 14 |
| Urban Traffic | 2011 | 13 | high_7 | 37.23076923076923 |
| Urban Traffic | 2012 | 16 | high_7 | 20 |
| Urban Traffic | 2013 | 13 | high_7 | 10.307692307692308 |
| Urban Traffic | 2014 | 13 | high_7 | 13.923076923076923 |
| Urban Traffic | 2015 | 18 | high_7 | 1.1111111111111112 |
| Urban Traffic | 2016 | 23 | high_7 | 11.695652173913043 |
| Urban Traffic | 2017 | 27 | high_7 | 3.4814814814814814 |
| Urban Traffic | 2018 | 30 | high_7 | 2 |
| Urban Traffic | 2019 | 37 | high_7 | 6.162162162162162 |
| Urban Traffic | 2020 | 35 | high_7 | 2.6285714285714286 |
| Urban Traffic | 2021 | 33 | high_7 | 0.36363636363636365 |
| Urban Traffic | 2022 | 35 | high_7 | 4.228571428571429 |
| Urban Traffic | 2023 | 36 | high_7 | 0.7222222222222222 |
| Urban Traffic | 2024 | 36 | high_7 | 1.4166666666666667 |
| Urban Traffic | 2025 | 40 | high_7 | 3.15 |
| Urban Traffic | 1997 | 4 | high_8 | 69.25 |
| Urban Traffic | 1998 | 7 | high_8 | 32.857142857142854 |
| Urban Traffic | 1999 | 7 | high_8 | 14 |
| Urban Traffic | 2000 | 7 | high_8 | 21.571428571428573 |
| Urban Traffic | 2001 | 7 | high_8 | 27.571428571428573 |
| Urban Traffic | 2002 | 7 | high_8 | 17 |
| Urban Traffic | 2003 | 7 | high_8 | 62.42857142857143 |
| Urban Traffic | 2004 | 7 | high_8 | 8.857142857142858 |
| Urban Traffic | 2005 | 7 | high_8 | 13.857142857142858 |
| Urban Traffic | 2006 | 7 | high_8 | 29.571428571428573 |
| Urban Traffic | 2007 | 6 | high_8 | 38.166666666666664 |
| Urban Traffic | 2008 | 11 | high_8 | 14.909090909090908 |
| Urban Traffic | 2009 | 14 | high_8 | 2.5 |
| Urban Traffic | 2010 | 14 | high_8 | 8.285714285714286 |
| Urban Traffic | 2011 | 13 | high_8 | 18.846153846153847 |
| Urban Traffic | 2012 | 16 | high_8 | 6.5625 |
| Urban Traffic | 2013 | 13 | high_8 | 3.4615384615384617 |
| Urban Traffic | 2014 | 13 | high_8 | 6.923076923076923 |
| Urban Traffic | 2015 | 18 | high_8 | 0.1111111111111111 |
| Urban Traffic | 2016 | 23 | high_8 | 4.913043478260869 |
| Urban Traffic | 2017 | 27 | high_8 | 1.8888888888888888 |
| Urban Traffic | 2018 | 30 | high_8 | 0.6666666666666666 |
| Urban Traffic | 2019 | 37 | high_8 | 1.054054054054054 |
| Urban Traffic | 2020 | 35 | high_8 | 2.1142857142857143 |
| Urban Traffic | 2021 | 33 | high_8 | 0.3333333333333333 |
| Urban Traffic | 2022 | 35 | high_8 | 2.857142857142857 |
| Urban Traffic | 2023 | 36 | high_8 | 0 |
| Urban Traffic | 2024 | 36 | high_8 | 0.6666666666666666 |
| Urban Traffic | 2025 | 40 | high_8 | 1.3 |
| Urban Traffic | 1997 | 4 | high_9 | 68.5 |
| Urban Traffic | 1998 | 7 | high_9 | 13 |
| Urban Traffic | 1999 | 7 | high_9 | 8.142857142857142 |
| Urban Traffic | 2000 | 7 | high_9 | 6.857142857142857 |
| Urban Traffic | 2001 | 7 | high_9 | 22.142857142857142 |
| Urban Traffic | 2002 | 7 | high_9 | 7.428571428571429 |
| Urban Traffic | 2003 | 7 | high_9 | 27.285714285714285 |
| Urban Traffic | 2004 | 7 | high_9 | 1.7142857142857142 |
| Urban Traffic | 2005 | 7 | high_9 | 0.5714285714285714 |
| Urban Traffic | 2006 | 7 | high_9 | 18.142857142857142 |
| Urban Traffic | 2007 | 6 | high_9 | 25 |
| Urban Traffic | 2008 | 11 | high_9 | 8.545454545454545 |
| Urban Traffic | 2009 | 14 | high_9 | 1.0714285714285714 |
| Urban Traffic | 2010 | 14 | high_9 | 4.5 |
| Urban Traffic | 2011 | 13 | high_9 | 10.538461538461538 |
| Urban Traffic | 2012 | 16 | high_9 | 2 |
| Urban Traffic | 2013 | 13 | high_9 | 1.6153846153846154 |
| Urban Traffic | 2014 | 13 | high_9 | 3.230769230769231 |
| Urban Traffic | 2015 | 18 | high_9 | 1 |
| Urban Traffic | 2016 | 23 | high_9 | 1.8695652173913044 |
| Urban Traffic | 2017 | 27 | high_9 | 1.9259259259259258 |
| Urban Traffic | 2018 | 30 | high_9 | 0.06666666666666667 |
| Urban Traffic | 2019 | 37 | high_9 | 0 |
| Urban Traffic | 2020 | 35 | high_9 | 0.2857142857142857 |
| Urban Traffic | 2021 | 33 | high_9 | 0 |
| Urban Traffic | 2022 | 35 | high_9 | 1.0571428571428572 |
| Urban Traffic | 2023 | 36 | high_9 | 0 |
| Urban Traffic | 2024 | 36 | high_9 | 0.08333333333333333 |
| Urban Traffic | 2025 | 40 | high_9 | 0.85 |
| Urban Traffic | 1997 | 4 | vhigh_10 | 49.75 |
| Urban Traffic | 1998 | 7 | vhigh_10 | 30.142857142857142 |
| Urban Traffic | 1999 | 7 | vhigh_10 | 35.285714285714285 |
| Urban Traffic | 2000 | 7 | vhigh_10 | 8.714285714285714 |
| Urban Traffic | 2001 | 7 | vhigh_10 | 47.285714285714285 |
| Urban Traffic | 2002 | 7 | vhigh_10 | 10.428571428571429 |
| Urban Traffic | 2003 | 7 | vhigh_10 | 12.571428571428571 |
| Urban Traffic | 2004 | 7 | vhigh_10 | 0 |
| Urban Traffic | 2005 | 7 | vhigh_10 | 2.5714285714285716 |
| Urban Traffic | 2006 | 7 | vhigh_10 | 11 |
| Urban Traffic | 2007 | 6 | vhigh_10 | 15.833333333333334 |
| Urban Traffic | 2008 | 11 | vhigh_10 | 2 |
| Urban Traffic | 2009 | 14 | vhigh_10 | 0 |
| Urban Traffic | 2010 | 14 | vhigh_10 | 8.357142857142858 |
| Urban Traffic | 2011 | 13 | vhigh_10 | 6.076923076923077 |
| Urban Traffic | 2012 | 16 | vhigh_10 | 0.9375 |
| Urban Traffic | 2013 | 13 | vhigh_10 | 0 |
| Urban Traffic | 2014 | 13 | vhigh_10 | 3.230769230769231 |
| Urban Traffic | 2015 | 18 | vhigh_10 | 1.3333333333333333 |
| Urban Traffic | 2016 | 23 | vhigh_10 | 0 |
| Urban Traffic | 2017 | 27 | vhigh_10 | 3.4074074074074074 |
| Urban Traffic | 2018 | 30 | vhigh_10 | 0 |
| Urban Traffic | 2019 | 37 | vhigh_10 | 0 |
| Urban Traffic | 2020 | 35 | vhigh_10 | 0.45714285714285713 |
| Urban Traffic | 2021 | 33 | vhigh_10 | 0 |
| Urban Traffic | 2022 | 35 | vhigh_10 | 0.2857142857142857 |
| Urban Traffic | 2023 | 36 | vhigh_10 | 0 |
| Urban Traffic | 2024 | 36 | vhigh_10 | 0 |
| Urban Traffic | 2025 | 40 | vhigh_10 | 2.65 |