Statistical data set
Figure 8: Annual mean hours per site when PM10 pollution was ‘Moderate’ or higher, for urban background sites, 1992 to 2025
Updated 30 June 2026
| Site type | Year | Number of sites | Daily Air Quality Index | Mean number of hours per site |
|---|---|---|---|---|
| Urban Background | 1992 | 2 | mod_4 | 400.5 |
| Urban Background | 1993 | 5 | mod_4 | 403.4 |
| Urban Background | 1994 | 13 | mod_4 | 367.3076923076923 |
| Urban Background | 1995 | 13 | mod_4 | 342.3076923076923 |
| Urban Background | 1996 | 16 | mod_4 | 348.125 |
| Urban Background | 1997 | 26 | mod_4 | 309.5 |
| Urban Background | 1998 | 33 | mod_4 | 189.72727272727272 |
| Urban Background | 1999 | 33 | mod_4 | 125.18181818181819 |
| Urban Background | 2000 | 34 | mod_4 | 101.82352941176471 |
| Urban Background | 2001 | 43 | mod_4 | 120.81395348837209 |
| Urban Background | 2002 | 39 | mod_4 | 90.53846153846153 |
| Urban Background | 2003 | 38 | mod_4 | 227.44736842105263 |
| Urban Background | 2004 | 39 | mod_4 | 73.1025641025641 |
| Urban Background | 2005 | 36 | mod_4 | 72.11111111111111 |
| Urban Background | 2006 | 39 | mod_4 | 119.35897435897436 |
| Urban Background | 2007 | 32 | mod_4 | 102.375 |
| Urban Background | 2008 | 28 | mod_4 | 75.67857142857143 |
| Urban Background | 2009 | 21 | mod_4 | 64.28571428571429 |
| Urban Background | 2010 | 19 | mod_4 | 64.73684210526316 |
| Urban Background | 2011 | 24 | mod_4 | 115.16666666666667 |
| Urban Background | 2012 | 25 | mod_4 | 73.56 |
| Urban Background | 2013 | 20 | mod_4 | 51.45 |
| Urban Background | 2014 | 23 | mod_4 | 55.82608695652174 |
| Urban Background | 2015 | 23 | mod_4 | 53.78260869565217 |
| Urban Background | 2016 | 22 | mod_4 | 35.09090909090909 |
| Urban Background | 2017 | 24 | mod_4 | 41.333333333333336 |
| Urban Background | 2018 | 22 | mod_4 | 17.454545454545453 |
| Urban Background | 2019 | 26 | mod_4 | 68.46153846153847 |
| Urban Background | 2020 | 40 | mod_4 | 13.025 |
| Urban Background | 2021 | 38 | mod_4 | 10.894736842105264 |
| Urban Background | 2022 | 44 | mod_4 | 35.04545454545455 |
| Urban Background | 2023 | 53 | mod_4 | 8.79245283018868 |
| Urban Background | 2024 | 57 | mod_4 | 6.684210526315789 |
| Urban Background | 2025 | 69 | mod_4 | 19.695652173913043 |
| Urban Background | 1992 | 2 | mod_5 | 202.5 |
| Urban Background | 1993 | 5 | mod_5 | 306 |
| Urban Background | 1994 | 13 | mod_5 | 224.46153846153845 |
| Urban Background | 1995 | 13 | mod_5 | 222.69230769230768 |
| Urban Background | 1996 | 16 | mod_5 | 229.3125 |
| Urban Background | 1997 | 26 | mod_5 | 150.3846153846154 |
| Urban Background | 1998 | 33 | mod_5 | 84.96969696969697 |
| Urban Background | 1999 | 33 | mod_5 | 45.121212121212125 |
| Urban Background | 2000 | 34 | mod_5 | 40.76470588235294 |
| Urban Background | 2001 | 43 | mod_5 | 54.44186046511628 |
| Urban Background | 2002 | 39 | mod_5 | 42.82051282051282 |
| Urban Background | 2003 | 38 | mod_5 | 127.57894736842105 |
| Urban Background | 2004 | 39 | mod_5 | 21.487179487179485 |
| Urban Background | 2005 | 36 | mod_5 | 25.194444444444443 |
| Urban Background | 2006 | 39 | mod_5 | 51.56410256410256 |
| Urban Background | 2007 | 32 | mod_5 | 57.0625 |
| Urban Background | 2008 | 28 | mod_5 | 40 |
| Urban Background | 2009 | 21 | mod_5 | 36.476190476190474 |
| Urban Background | 2010 | 19 | mod_5 | 17.31578947368421 |
| Urban Background | 2011 | 24 | mod_5 | 63.375 |
| Urban Background | 2012 | 25 | mod_5 | 45.96 |
| Urban Background | 2013 | 20 | mod_5 | 27.05 |
| Urban Background | 2014 | 23 | mod_5 | 24.130434782608695 |
| Urban Background | 2015 | 23 | mod_5 | 26.304347826086957 |
| Urban Background | 2016 | 22 | mod_5 | 20.454545454545453 |
| Urban Background | 2017 | 24 | mod_5 | 16.291666666666668 |
| Urban Background | 2018 | 22 | mod_5 | 10.136363636363637 |
| Urban Background | 2019 | 26 | mod_5 | 28.576923076923077 |
| Urban Background | 2020 | 40 | mod_5 | 7.275 |
| Urban Background | 2021 | 38 | mod_5 | 3.763157894736842 |
| Urban Background | 2022 | 44 | mod_5 | 14.636363636363637 |
| Urban Background | 2023 | 53 | mod_5 | 2.509433962264151 |
| Urban Background | 2024 | 57 | mod_5 | 2.719298245614035 |
| Urban Background | 2025 | 69 | mod_5 | 7.826086956521739 |
| Urban Background | 1992 | 2 | mod_6 | 132 |
| Urban Background | 1993 | 5 | mod_6 | 250.6 |
| Urban Background | 1994 | 13 | mod_6 | 164.84615384615384 |
| Urban Background | 1995 | 13 | mod_6 | 164.76923076923077 |
| Urban Background | 1996 | 16 | mod_6 | 161 |
| Urban Background | 1997 | 26 | mod_6 | 92.07692307692308 |
| Urban Background | 1998 | 33 | mod_6 | 52.60606060606061 |
| Urban Background | 1999 | 33 | mod_6 | 19.272727272727273 |
| Urban Background | 2000 | 34 | mod_6 | 17.647058823529413 |
| Urban Background | 2001 | 43 | mod_6 | 29.3953488372093 |
| Urban Background | 2002 | 39 | mod_6 | 16.41025641025641 |
| Urban Background | 2003 | 38 | mod_6 | 70.36842105263158 |
| Urban Background | 2004 | 39 | mod_6 | 6.384615384615385 |
| Urban Background | 2005 | 36 | mod_6 | 12.694444444444445 |
| Urban Background | 2006 | 39 | mod_6 | 25.333333333333332 |
| Urban Background | 2007 | 32 | mod_6 | 40.59375 |
| Urban Background | 2008 | 28 | mod_6 | 27.214285714285715 |
| Urban Background | 2009 | 21 | mod_6 | 15.095238095238095 |
| Urban Background | 2010 | 19 | mod_6 | 9.947368421052632 |
| Urban Background | 2011 | 24 | mod_6 | 37.75 |
| Urban Background | 2012 | 25 | mod_6 | 20.48 |
| Urban Background | 2013 | 20 | mod_6 | 18.7 |
| Urban Background | 2014 | 23 | mod_6 | 14.826086956521738 |
| Urban Background | 2015 | 23 | mod_6 | 7.478260869565218 |
| Urban Background | 2016 | 22 | mod_6 | 12.045454545454545 |
| Urban Background | 2017 | 24 | mod_6 | 6.916666666666667 |
| Urban Background | 2018 | 22 | mod_6 | 5.454545454545454 |
| Urban Background | 2019 | 26 | mod_6 | 13.884615384615385 |
| Urban Background | 2020 | 40 | mod_6 | 3.8 |
| Urban Background | 2021 | 38 | mod_6 | 0.4473684210526316 |
| Urban Background | 2022 | 44 | mod_6 | 9.840909090909092 |
| Urban Background | 2023 | 53 | mod_6 | 0.7547169811320755 |
| Urban Background | 2024 | 57 | mod_6 | 1.2105263157894737 |
| Urban Background | 2025 | 69 | mod_6 | 2.9130434782608696 |
| Urban Background | 1992 | 2 | high_7 | 95 |
| Urban Background | 1993 | 5 | high_7 | 119.4 |
| Urban Background | 1994 | 13 | high_7 | 80.6923076923077 |
| Urban Background | 1995 | 13 | high_7 | 66 |
| Urban Background | 1996 | 16 | high_7 | 90.1875 |
| Urban Background | 1997 | 26 | high_7 | 52.88461538461539 |
| Urban Background | 1998 | 33 | high_7 | 23.727272727272727 |
| Urban Background | 1999 | 33 | high_7 | 6.666666666666667 |
| Urban Background | 2000 | 34 | high_7 | 8.882352941176471 |
| Urban Background | 2001 | 43 | high_7 | 13.279069767441861 |
| Urban Background | 2002 | 39 | high_7 | 4.333333333333333 |
| Urban Background | 2003 | 38 | high_7 | 21.86842105263158 |
| Urban Background | 2004 | 39 | high_7 | 2.717948717948718 |
| Urban Background | 2005 | 36 | high_7 | 5.722222222222222 |
| Urban Background | 2006 | 39 | high_7 | 9.35897435897436 |
| Urban Background | 2007 | 32 | high_7 | 23.25 |
| Urban Background | 2008 | 28 | high_7 | 13.107142857142858 |
| Urban Background | 2009 | 21 | high_7 | 6.0476190476190474 |
| Urban Background | 2010 | 19 | high_7 | 4.2631578947368425 |
| Urban Background | 2011 | 24 | high_7 | 16.208333333333332 |
| Urban Background | 2012 | 25 | high_7 | 6.6 |
| Urban Background | 2013 | 20 | high_7 | 3.45 |
| Urban Background | 2014 | 23 | high_7 | 8.130434782608695 |
| Urban Background | 2015 | 23 | high_7 | 1 |
| Urban Background | 2016 | 22 | high_7 | 4.363636363636363 |
| Urban Background | 2017 | 24 | high_7 | 0.7916666666666666 |
| Urban Background | 2018 | 22 | high_7 | 1.1818181818181819 |
| Urban Background | 2019 | 26 | high_7 | 1.3846153846153846 |
| Urban Background | 2020 | 40 | high_7 | 1.975 |
| Urban Background | 2021 | 38 | high_7 | 0 |
| Urban Background | 2022 | 44 | high_7 | 3.2954545454545454 |
| Urban Background | 2023 | 53 | high_7 | 0.5471698113207547 |
| Urban Background | 2024 | 57 | high_7 | 0.43859649122807015 |
| Urban Background | 2025 | 69 | high_7 | 0.7391304347826086 |
| Urban Background | 1992 | 2 | high_8 | 98.5 |
| Urban Background | 1993 | 5 | high_8 | 83.2 |
| Urban Background | 1994 | 13 | high_8 | 51.23076923076923 |
| Urban Background | 1995 | 13 | high_8 | 42.61538461538461 |
| Urban Background | 1996 | 16 | high_8 | 63.375 |
| Urban Background | 1997 | 26 | high_8 | 30.96153846153846 |
| Urban Background | 1998 | 33 | high_8 | 11.606060606060606 |
| Urban Background | 1999 | 33 | high_8 | 3.242424242424242 |
| Urban Background | 2000 | 34 | high_8 | 3.6470588235294117 |
| Urban Background | 2001 | 43 | high_8 | 8.465116279069768 |
| Urban Background | 2002 | 39 | high_8 | 1.9743589743589745 |
| Urban Background | 2003 | 38 | high_8 | 5.842105263157895 |
| Urban Background | 2004 | 39 | high_8 | 2.076923076923077 |
| Urban Background | 2005 | 36 | high_8 | 2.2222222222222223 |
| Urban Background | 2006 | 39 | high_8 | 6.128205128205129 |
| Urban Background | 2007 | 32 | high_8 | 11.65625 |
| Urban Background | 2008 | 28 | high_8 | 6.535714285714286 |
| Urban Background | 2009 | 21 | high_8 | 3.2857142857142856 |
| Urban Background | 2010 | 19 | high_8 | 1.5263157894736843 |
| Urban Background | 2011 | 24 | high_8 | 8 |
| Urban Background | 2012 | 25 | high_8 | 2.36 |
| Urban Background | 2013 | 20 | high_8 | 0.95 |
| Urban Background | 2014 | 23 | high_8 | 1.434782608695652 |
| Urban Background | 2015 | 23 | high_8 | 0.391304347826087 |
| Urban Background | 2016 | 22 | high_8 | 0.4090909090909091 |
| Urban Background | 2017 | 24 | high_8 | 0.375 |
| Urban Background | 2018 | 22 | high_8 | 1.0909090909090908 |
| Urban Background | 2019 | 26 | high_8 | 0.5 |
| Urban Background | 2020 | 40 | high_8 | 0.3 |
| Urban Background | 2021 | 38 | high_8 | 0 |
| Urban Background | 2022 | 44 | high_8 | 1.5227272727272727 |
| Urban Background | 2023 | 53 | high_8 | 0.1320754716981132 |
| Urban Background | 2024 | 57 | high_8 | 0 |
| Urban Background | 2025 | 69 | high_8 | 0.028985507246376812 |
| Urban Background | 1992 | 2 | high_9 | 46 |
| Urban Background | 1993 | 5 | high_9 | 66.8 |
| Urban Background | 1994 | 13 | high_9 | 33.69230769230769 |
| Urban Background | 1995 | 13 | high_9 | 20.076923076923077 |
| Urban Background | 1996 | 16 | high_9 | 48.3125 |
| Urban Background | 1997 | 26 | high_9 | 19.115384615384617 |
| Urban Background | 1998 | 33 | high_9 | 7.03030303030303 |
| Urban Background | 1999 | 33 | high_9 | 1.0303030303030303 |
| Urban Background | 2000 | 34 | high_9 | 2.4705882352941178 |
| Urban Background | 2001 | 43 | high_9 | 5.441860465116279 |
| Urban Background | 2002 | 39 | high_9 | 1.8461538461538463 |
| Urban Background | 2003 | 38 | high_9 | 3.5789473684210527 |
| Urban Background | 2004 | 39 | high_9 | 0.5897435897435898 |
| Urban Background | 2005 | 36 | high_9 | 2.0833333333333335 |
| Urban Background | 2006 | 39 | high_9 | 4.615384615384615 |
| Urban Background | 2007 | 32 | high_9 | 8.4375 |
| Urban Background | 2008 | 28 | high_9 | 3.892857142857143 |
| Urban Background | 2009 | 21 | high_9 | 0.6190476190476191 |
| Urban Background | 2010 | 19 | high_9 | 0.8947368421052632 |
| Urban Background | 2011 | 24 | high_9 | 3.7916666666666665 |
| Urban Background | 2012 | 25 | high_9 | 1.44 |
| Urban Background | 2013 | 20 | high_9 | 0 |
| Urban Background | 2014 | 23 | high_9 | 0.30434782608695654 |
| Urban Background | 2015 | 23 | high_9 | 0 |
| Urban Background | 2016 | 22 | high_9 | 0.22727272727272727 |
| Urban Background | 2017 | 24 | high_9 | 0.75 |
| Urban Background | 2018 | 22 | high_9 | 0.22727272727272727 |
| Urban Background | 2019 | 26 | high_9 | 0.7307692307692307 |
| Urban Background | 2020 | 40 | high_9 | 0.525 |
| Urban Background | 2021 | 38 | high_9 | 0 |
| Urban Background | 2022 | 44 | high_9 | 0.25 |
| Urban Background | 2023 | 53 | high_9 | 0.03773584905660377 |
| Urban Background | 2024 | 57 | high_9 | 0 |
| Urban Background | 2025 | 69 | high_9 | 0.043478260869565216 |
| Urban Background | 1992 | 2 | vhigh_10 | 171 |
| Urban Background | 1993 | 5 | vhigh_10 | 69.4 |
| Urban Background | 1994 | 13 | vhigh_10 | 48.15384615384615 |
| Urban Background | 1995 | 13 | vhigh_10 | 26.46153846153846 |
| Urban Background | 1996 | 16 | vhigh_10 | 79.625 |
| Urban Background | 1997 | 26 | vhigh_10 | 26.115384615384617 |
| Urban Background | 1998 | 33 | vhigh_10 | 9.363636363636363 |
| Urban Background | 1999 | 33 | vhigh_10 | 2.6666666666666665 |
| Urban Background | 2000 | 34 | vhigh_10 | 3.7058823529411766 |
| Urban Background | 2001 | 43 | vhigh_10 | 12.674418604651162 |
| Urban Background | 2002 | 39 | vhigh_10 | 3.8461538461538463 |
| Urban Background | 2003 | 38 | vhigh_10 | 4.7368421052631575 |
| Urban Background | 2004 | 39 | vhigh_10 | 2.2564102564102564 |
| Urban Background | 2005 | 36 | vhigh_10 | 5 |
| Urban Background | 2006 | 39 | vhigh_10 | 5.769230769230769 |
| Urban Background | 2007 | 32 | vhigh_10 | 10.1875 |
| Urban Background | 2008 | 28 | vhigh_10 | 4.785714285714286 |
| Urban Background | 2009 | 21 | vhigh_10 | 0 |
| Urban Background | 2010 | 19 | vhigh_10 | 1.894736842105263 |
| Urban Background | 2011 | 24 | vhigh_10 | 5.166666666666667 |
| Urban Background | 2012 | 25 | vhigh_10 | 0 |
| Urban Background | 2013 | 20 | vhigh_10 | 0 |
| Urban Background | 2014 | 23 | vhigh_10 | 3.3043478260869565 |
| Urban Background | 2015 | 23 | vhigh_10 | 0 |
| Urban Background | 2016 | 22 | vhigh_10 | 2.272727272727273 |
| Urban Background | 2017 | 24 | vhigh_10 | 0.9166666666666666 |
| Urban Background | 2018 | 22 | vhigh_10 | 0 |
| Urban Background | 2019 | 26 | vhigh_10 | 1.2307692307692308 |
| Urban Background | 2020 | 40 | vhigh_10 | 0.825 |
| Urban Background | 2021 | 38 | vhigh_10 | 0 |
| Urban Background | 2022 | 44 | vhigh_10 | 0 |
| Urban Background | 2023 | 53 | vhigh_10 | 0.32075471698113206 |
| Urban Background | 2024 | 57 | vhigh_10 | 0 |
| Urban Background | 2025 | 69 | vhigh_10 | 0.2463768115942029 |