Statistical data set
Figure 12: Hourly mean PM2.5 concentration at roadside and urban background sites, 2023
Updated 30 April 2024
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| Site type | Hour | Number of sites | Mean concentration of PM2.5 (µg/m3) | 95% confidence interval for 'All sites' (+/-) |
|---|---|---|---|---|
| Urban Background | 1:00 AM | 56 | 7.68092478 | 0.301231296 |
| Urban Background | 2:00 AM | 56 | 7.481126102 | 0.281972825 |
| Urban Background | 3:00 AM | 56 | 7.333386244 | 0.270146331 |
| Urban Background | 4:00 AM | 56 | 7.19775419 | 0.269303257 |
| Urban Background | 5:00 AM | 56 | 7.092061334 | 0.267892075 |
| Urban Background | 6:00 AM | 56 | 7.116079846 | 0.270260382 |
| Urban Background | 7:00 AM | 56 | 7.172848409 | 0.265064313 |
| Urban Background | 8:00 AM | 56 | 7.263966181 | 0.266463701 |
| Urban Background | 9:00 AM | 56 | 7.270939001 | 0.277161776 |
| Urban Background | 10:00 AM | 56 | 7.14550541 | 0.351795946 |
| Urban Background | 11:00 AM | 56 | 6.926863235 | 0.428570296 |
| Urban Background | 12:00 PM | 55 | 6.65337751 | 0.439439939 |
| Urban Background | 1:00 PM | 56 | 6.427231814 | 0.372864784 |
| Urban Background | 2:00 PM | 56 | 6.272304386 | 0.315728843 |
| Urban Background | 3:00 PM | 56 | 6.207292469 | 0.283379395 |
| Urban Background | 4:00 PM | 56 | 6.240823153 | 0.254991449 |
| Urban Background | 5:00 PM | 56 | 6.513957241 | 0.255052701 |
| Urban Background | 6:00 PM | 56 | 7.009968722 | 0.274751882 |
| Urban Background | 7:00 PM | 56 | 7.590331337 | 0.309783959 |
| Urban Background | 8:00 PM | 56 | 8.119222254 | 0.324700483 |
| Urban Background | 9:00 PM | 56 | 8.36995487 | 0.342325458 |
| Urban Background | 10:00 PM | 56 | 8.36525955 | 0.333261298 |
| Urban Background | 11:00 PM | 56 | 8.219764073 | 0.328051833 |
| Urban Background | 12:00 AM | 56 | 7.953837994 | 0.312446315 |
| Urban Traffic | 1:00 AM | 23 | 7.768317672 | 0.79463914 |
| Urban Traffic | 2:00 AM | 23 | 7.467190256 | 0.779333013 |
| Urban Traffic | 3:00 AM | 23 | 7.403912648 | 0.769383527 |
| Urban Traffic | 4:00 AM | 23 | 7.263376537 | 0.761074807 |
| Urban Traffic | 5:00 AM | 23 | 7.192957931 | 0.761810393 |
| Urban Traffic | 6:00 AM | 23 | 7.328818793 | 0.775391722 |
| Urban Traffic | 7:00 AM | 23 | 7.605594605 | 0.788790236 |
| Urban Traffic | 8:00 AM | 23 | 7.878814496 | 0.788716844 |
| Urban Traffic | 9:00 AM | 23 | 7.832747318 | 0.77488747 |
| Urban Traffic | 10:00 AM | 23 | 7.661087785 | 0.712090856 |
| Urban Traffic | 11:00 AM | 23 | 7.470641468 | 0.687941866 |
| Urban Traffic | 12:00 PM | 23 | 7.226176093 | 0.683731263 |
| Urban Traffic | 1:00 PM | 23 | 7.008540289 | 0.649874366 |
| Urban Traffic | 2:00 PM | 23 | 6.929064107 | 0.679754857 |
| Urban Traffic | 3:00 PM | 23 | 6.934604089 | 0.696961922 |
| Urban Traffic | 4:00 PM | 23 | 7.009291257 | 0.680969585 |
| Urban Traffic | 5:00 PM | 23 | 7.317668936 | 0.713531669 |
| Urban Traffic | 6:00 PM | 23 | 7.864123746 | 0.770400269 |
| Urban Traffic | 7:00 PM | 23 | 8.499213786 | 0.823595166 |
| Urban Traffic | 8:00 PM | 23 | 8.879325275 | 0.868213046 |
| Urban Traffic | 9:00 PM | 23 | 9.025893622 | 0.870437175 |
| Urban Traffic | 10:00 PM | 23 | 8.926232318 | 0.843937611 |
| Urban Traffic | 11:00 PM | 23 | 8.591848313 | 0.851029608 |
| Urban Traffic | 12:00 AM | 23 | 8.206672867 | 0.809543302 |