Statistical data set
Figure 4: Hourly mean NO2 concentration at roadside, urban background and rural background sites, 2023
Updated 30 April 2024
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| Site type | Hour | Number of sites | Mean concentration of NO2 (µg/m3) | 95% confidence interval for 'All sites' (+/-) |
|---|---|---|---|---|
| Rural Background | 1:00 AM | 12 | 5.351767144 | 2.166495692 |
| Rural Background | 2:00 AM | 10 | 4.120134448 | 1.592202953 |
| Rural Background | 3:00 AM | 12 | 4.689912483 | 1.861484471 |
| Rural Background | 4:00 AM | 12 | 4.555822591 | 1.821712919 |
| Rural Background | 5:00 AM | 12 | 4.555086693 | 1.8479257 |
| Rural Background | 6:00 AM | 12 | 4.701315763 | 1.929361841 |
| Rural Background | 7:00 AM | 12 | 5.054221414 | 2.114775328 |
| Rural Background | 8:00 AM | 12 | 5.507840863 | 2.240764111 |
| Rural Background | 9:00 AM | 12 | 5.555122498 | 2.204545008 |
| Rural Background | 10:00 AM | 12 | 5.351389272 | 2.005746915 |
| Rural Background | 11:00 AM | 12 | 4.986780131 | 1.768903193 |
| Rural Background | 12:00 PM | 12 | 4.680355513 | 1.509336686 |
| Rural Background | 1:00 PM | 12 | 4.414799628 | 1.328097829 |
| Rural Background | 2:00 PM | 12 | 4.318873584 | 1.254846569 |
| Rural Background | 3:00 PM | 12 | 4.396505492 | 1.247011164 |
| Rural Background | 4:00 PM | 12 | 4.654805865 | 1.375452567 |
| Rural Background | 5:00 PM | 12 | 5.101852018 | 1.579284448 |
| Rural Background | 6:00 PM | 12 | 5.618941017 | 1.822668146 |
| Rural Background | 7:00 PM | 12 | 5.978081625 | 2.073580073 |
| Rural Background | 8:00 PM | 12 | 6.198101815 | 2.265210458 |
| Rural Background | 9:00 PM | 12 | 6.195736738 | 2.294015422 |
| Rural Background | 10:00 PM | 12 | 6.002160669 | 2.290558563 |
| Rural Background | 11:00 PM | 12 | 5.853095055 | 2.311595877 |
| Rural Background | 12:00 AM | 12 | 5.567568041 | 2.25467275 |
| Urban Background | 1:00 AM | 59 | 12.28908113 | 1.131669101 |
| Urban Background | 2:00 AM | 57 | 11.18707449 | 1.060534667 |
| Urban Background | 3:00 AM | 60 | 10.26948365 | 0.975622952 |
| Urban Background | 4:00 AM | 60 | 10.02795251 | 0.956088361 |
| Urban Background | 5:00 AM | 60 | 10.86461563 | 1.053993401 |
| Urban Background | 6:00 AM | 60 | 12.98967964 | 1.24722615 |
| Urban Background | 7:00 AM | 60 | 15.61329586 | 1.398067921 |
| Urban Background | 8:00 AM | 60 | 17.46084963 | 1.419921916 |
| Urban Background | 9:00 AM | 60 | 17.27194514 | 1.375820095 |
| Urban Background | 10:00 AM | 60 | 15.25819038 | 1.33065877 |
| Urban Background | 11:00 AM | 60 | 13.35839821 | 1.269806482 |
| Urban Background | 12:00 PM | 60 | 12.19261069 | 1.21813272 |
| Urban Background | 1:00 PM | 60 | 11.5897591 | 1.178932043 |
| Urban Background | 2:00 PM | 60 | 11.44463946 | 1.1749155 |
| Urban Background | 3:00 PM | 60 | 11.9663474 | 1.195404804 |
| Urban Background | 4:00 PM | 60 | 13.29598084 | 1.237084002 |
| Urban Background | 5:00 PM | 60 | 15.37382071 | 1.314039789 |
| Urban Background | 6:00 PM | 60 | 17.19517102 | 1.379401999 |
| Urban Background | 7:00 PM | 60 | 18.21791027 | 1.426105089 |
| Urban Background | 8:00 PM | 60 | 18.58291133 | 1.45453959 |
| Urban Background | 9:00 PM | 60 | 18.10498684 | 1.43844383 |
| Urban Background | 10:00 PM | 60 | 17.13148957 | 1.436037053 |
| Urban Background | 11:00 PM | 60 | 15.76422337 | 1.408902493 |
| Urban Background | 12:00 AM | 60 | 13.87378217 | 1.258369702 |
| Urban Traffic | 1:00 AM | 60 | 14.71455185 | 1.431188579 |
| Urban Traffic | 2:00 AM | 61 | 12.2569543 | 1.114229909 |
| Urban Traffic | 3:00 AM | 61 | 11.3362414 | 1.049517832 |
| Urban Traffic | 4:00 AM | 61 | 11.35907655 | 1.057405722 |
| Urban Traffic | 5:00 AM | 61 | 13.67960931 | 1.313050839 |
| Urban Traffic | 6:00 AM | 61 | 18.47659664 | 1.689363304 |
| Urban Traffic | 7:00 AM | 61 | 23.97598117 | 2.02680699 |
| Urban Traffic | 8:00 AM | 61 | 27.20840861 | 2.137696047 |
| Urban Traffic | 9:00 AM | 61 | 27.23127033 | 2.16285322 |
| Urban Traffic | 10:00 AM | 61 | 25.16641775 | 2.143884233 |
| Urban Traffic | 11:00 AM | 61 | 23.52486373 | 2.178398994 |
| Urban Traffic | 12:00 PM | 61 | 22.73549785 | 2.179426484 |
| Urban Traffic | 1:00 PM | 61 | 22.40434053 | 2.194264713 |
| Urban Traffic | 2:00 PM | 61 | 22.55931075 | 2.239869553 |
| Urban Traffic | 3:00 PM | 61 | 23.68090739 | 2.309478017 |
| Urban Traffic | 4:00 PM | 61 | 25.51412209 | 2.404655847 |
| Urban Traffic | 5:00 PM | 61 | 27.62136224 | 2.44888423 |
| Urban Traffic | 6:00 PM | 61 | 28.62002183 | 2.398627043 |
| Urban Traffic | 7:00 PM | 61 | 28.36653884 | 2.286451319 |
| Urban Traffic | 8:00 PM | 61 | 27.06743723 | 2.192267287 |
| Urban Traffic | 9:00 PM | 61 | 25.27432383 | 2.099733398 |
| Urban Traffic | 10:00 PM | 61 | 23.31010252 | 2.036394974 |
| Urban Traffic | 11:00 PM | 61 | 20.77818514 | 2.029069619 |
| Urban Traffic | 12:00 AM | 61 | 17.40461789 | 1.752899312 |