Statistical data set
Figure 10: Annual mean hours when PM2.5 pollution was 鈥楳oderate鈥� or higher for urban background sites, 2009 to 2025
Updated 30 June 2026
| Site type | Year | Number of sites | Daily Air Quality Index | Mean number of hours per site |
|---|---|---|---|---|
| Urban Background | 2009 | 32 | mod_4 | 120.78125 |
| Urban Background | 2010 | 31 | mod_4 | 102.19354838709677 |
| Urban Background | 2011 | 30 | mod_4 | 189.4 |
| Urban Background | 2012 | 31 | mod_4 | 136.1290322580645 |
| Urban Background | 2013 | 31 | mod_4 | 100.51612903225806 |
| Urban Background | 2014 | 29 | mod_4 | 97.13793103448276 |
| Urban Background | 2015 | 35 | mod_4 | 67.57142857142857 |
| Urban Background | 2016 | 35 | mod_4 | 56.542857142857144 |
| Urban Background | 2017 | 36 | mod_4 | 57.02777777777778 |
| Urban Background | 2018 | 37 | mod_4 | 31.324324324324323 |
| Urban Background | 2019 | 41 | mod_4 | 86.70731707317073 |
| Urban Background | 2020 | 42 | mod_4 | 24.142857142857142 |
| Urban Background | 2021 | 39 | mod_4 | 17.256410256410255 |
| Urban Background | 2022 | 46 | mod_4 | 39.58695652173913 |
| Urban Background | 2023 | 56 | mod_4 | 12.232142857142858 |
| Urban Background | 2024 | 60 | mod_4 | 5.85 |
| Urban Background | 2025 | 71 | mod_4 | 27.112676056338028 |
| Urban Background | 2009 | 32 | mod_5 | 66.28125 |
| Urban Background | 2010 | 31 | mod_5 | 55.806451612903224 |
| Urban Background | 2011 | 30 | mod_5 | 114.46666666666667 |
| Urban Background | 2012 | 31 | mod_5 | 75.64516129032258 |
| Urban Background | 2013 | 31 | mod_5 | 44.45161290322581 |
| Urban Background | 2014 | 29 | mod_5 | 52.689655172413794 |
| Urban Background | 2015 | 35 | mod_5 | 46.371428571428574 |
| Urban Background | 2016 | 35 | mod_5 | 32.857142857142854 |
| Urban Background | 2017 | 36 | mod_5 | 41.5 |
| Urban Background | 2018 | 37 | mod_5 | 14.54054054054054 |
| Urban Background | 2019 | 41 | mod_5 | 52.853658536585364 |
| Urban Background | 2020 | 42 | mod_5 | 9.095238095238095 |
| Urban Background | 2021 | 39 | mod_5 | 9.58974358974359 |
| Urban Background | 2022 | 46 | mod_5 | 17.391304347826086 |
| Urban Background | 2023 | 56 | mod_5 | 3.8392857142857144 |
| Urban Background | 2024 | 60 | mod_5 | 1.1166666666666667 |
| Urban Background | 2025 | 71 | mod_5 | 11.464788732394366 |
| Urban Background | 2009 | 32 | mod_6 | 37.9375 |
| Urban Background | 2010 | 31 | mod_6 | 27.838709677419356 |
| Urban Background | 2011 | 30 | mod_6 | 67.86666666666666 |
| Urban Background | 2012 | 31 | mod_6 | 49.03225806451613 |
| Urban Background | 2013 | 31 | mod_6 | 32.67741935483871 |
| Urban Background | 2014 | 29 | mod_6 | 31.586206896551722 |
| Urban Background | 2015 | 35 | mod_6 | 31.685714285714287 |
| Urban Background | 2016 | 35 | mod_6 | 16.514285714285716 |
| Urban Background | 2017 | 36 | mod_6 | 26.833333333333332 |
| Urban Background | 2018 | 37 | mod_6 | 8.18918918918919 |
| Urban Background | 2019 | 41 | mod_6 | 24.26829268292683 |
| Urban Background | 2020 | 42 | mod_6 | 5.261904761904762 |
| Urban Background | 2021 | 39 | mod_6 | 4.461538461538462 |
| Urban Background | 2022 | 46 | mod_6 | 7 |
| Urban Background | 2023 | 56 | mod_6 | 1.4642857142857142 |
| Urban Background | 2024 | 60 | mod_6 | 0.7 |
| Urban Background | 2025 | 71 | mod_6 | 5.394366197183099 |
| Urban Background | 2009 | 32 | high_7 | 18.0625 |
| Urban Background | 2010 | 31 | high_7 | 9.774193548387096 |
| Urban Background | 2011 | 30 | high_7 | 34.13333333333333 |
| Urban Background | 2012 | 31 | high_7 | 28.870967741935484 |
| Urban Background | 2013 | 31 | high_7 | 20.193548387096776 |
| Urban Background | 2014 | 29 | high_7 | 18.96551724137931 |
| Urban Background | 2015 | 35 | high_7 | 13.942857142857143 |
| Urban Background | 2016 | 35 | high_7 | 9.685714285714285 |
| Urban Background | 2017 | 36 | high_7 | 7.972222222222222 |
| Urban Background | 2018 | 37 | high_7 | 5.378378378378378 |
| Urban Background | 2019 | 41 | high_7 | 7.585365853658536 |
| Urban Background | 2020 | 42 | high_7 | 3.380952380952381 |
| Urban Background | 2021 | 39 | high_7 | 0.6153846153846154 |
| Urban Background | 2022 | 46 | high_7 | 3.1956521739130435 |
| Urban Background | 2023 | 56 | high_7 | 0.26785714285714285 |
| Urban Background | 2024 | 60 | high_7 | 0.26666666666666666 |
| Urban Background | 2025 | 71 | high_7 | 1.7464788732394365 |
| Urban Background | 2009 | 32 | high_8 | 9.65625 |
| Urban Background | 2010 | 31 | high_8 | 6.290322580645161 |
| Urban Background | 2011 | 30 | high_8 | 28.266666666666666 |
| Urban Background | 2012 | 31 | high_8 | 20.06451612903226 |
| Urban Background | 2013 | 31 | high_8 | 13.903225806451612 |
| Urban Background | 2014 | 29 | high_8 | 17.137931034482758 |
| Urban Background | 2015 | 35 | high_8 | 6.914285714285715 |
| Urban Background | 2016 | 35 | high_8 | 5.628571428571429 |
| Urban Background | 2017 | 36 | high_8 | 3.9166666666666665 |
| Urban Background | 2018 | 37 | high_8 | 4.918918918918919 |
| Urban Background | 2019 | 41 | high_8 | 2.3658536585365852 |
| Urban Background | 2020 | 42 | high_8 | 2.0476190476190474 |
| Urban Background | 2021 | 39 | high_8 | 0.05128205128205128 |
| Urban Background | 2022 | 46 | high_8 | 2.8043478260869565 |
| Urban Background | 2023 | 56 | high_8 | 0.3392857142857143 |
| Urban Background | 2024 | 60 | high_8 | 0.35 |
| Urban Background | 2025 | 71 | high_8 | 1.0985915492957747 |
| Urban Background | 2009 | 32 | high_9 | 5.25 |
| Urban Background | 2010 | 31 | high_9 | 3.096774193548387 |
| Urban Background | 2011 | 30 | high_9 | 15.1 |
| Urban Background | 2012 | 31 | high_9 | 11.612903225806452 |
| Urban Background | 2013 | 31 | high_9 | 6.774193548387097 |
| Urban Background | 2014 | 29 | high_9 | 7.137931034482759 |
| Urban Background | 2015 | 35 | high_9 | 0.6571428571428571 |
| Urban Background | 2016 | 35 | high_9 | 2.857142857142857 |
| Urban Background | 2017 | 36 | high_9 | 2.25 |
| Urban Background | 2018 | 37 | high_9 | 0.918918918918919 |
| Urban Background | 2019 | 41 | high_9 | 0.2682926829268293 |
| Urban Background | 2020 | 42 | high_9 | 1.6428571428571428 |
| Urban Background | 2021 | 39 | high_9 | 0.05128205128205128 |
| Urban Background | 2022 | 46 | high_9 | 0.7608695652173914 |
| Urban Background | 2023 | 56 | high_9 | 0.5357142857142857 |
| Urban Background | 2024 | 60 | high_9 | 0.13333333333333333 |
| Urban Background | 2025 | 71 | high_9 | 0.1267605633802817 |
| Urban Background | 2009 | 32 | vhigh_10 | 1.84375 |
| Urban Background | 2010 | 31 | vhigh_10 | 8.387096774193548 |
| Urban Background | 2011 | 30 | vhigh_10 | 14.733333333333333 |
| Urban Background | 2012 | 31 | vhigh_10 | 6.903225806451613 |
| Urban Background | 2013 | 31 | vhigh_10 | 4.32258064516129 |
| Urban Background | 2014 | 29 | vhigh_10 | 12.517241379310345 |
| Urban Background | 2015 | 35 | vhigh_10 | 0.7428571428571429 |
| Urban Background | 2016 | 35 | vhigh_10 | 0.7428571428571429 |
| Urban Background | 2017 | 36 | vhigh_10 | 6.861111111111111 |
| Urban Background | 2018 | 37 | vhigh_10 | 0.7837837837837838 |
| Urban Background | 2019 | 41 | vhigh_10 | 0.17073170731707318 |
| Urban Background | 2020 | 42 | vhigh_10 | 1.2619047619047619 |
| Urban Background | 2021 | 39 | vhigh_10 | 0 |
| Urban Background | 2022 | 46 | vhigh_10 | 0.15217391304347827 |
| Urban Background | 2023 | 56 | vhigh_10 | 0.17857142857142858 |
| Urban Background | 2024 | 60 | vhigh_10 | 0 |
| Urban Background | 2025 | 71 | vhigh_10 | 0 |