Statistical data set
Figure 3: Weekday mean NO2 concentration at roadside, urban background and rural background sites, 2025
Updated 30 June 2026
| Site type | Weekday | Number of sites | Mean concentration of NO2 (µg/m3) | 95% confidence interval for 'All sites' (+/-) |
|---|---|---|---|---|
| Rural Background | Friday | 12 | 5.319379731487493 | 2.0136351130118424 |
| Rural Background | Monday | 12 | 4.58898203614129 | 1.5761180398565484 |
| Rural Background | Saturday | 12 | 5.052828633202292 | 1.7921968034487394 |
| Rural Background | Sunday | 12 | 4.2858472282536 | 1.3917928690548795 |
| Rural Background | Thursday | 12 | 5.162532488511057 | 1.8415455211476548 |
| Rural Background | Tuesday | 12 | 4.97319198225519 | 1.8558674847523435 |
| Rural Background | Wednesday | 12 | 5.296897712448872 | 2.0093369649439357 |
| Urban Background | Friday | 60 | 14.619219296034885 | 1.2237401943083857 |
| Urban Background | Monday | 60 | 12.738084542905794 | 1.0780559466436601 |
| Urban Background | Saturday | 60 | 13.343664233898872 | 1.1427010071654187 |
| Urban Background | Sunday | 60 | 10.520340112864346 | 0.9229603501507875 |
| Urban Background | Thursday | 60 | 14.485473854336522 | 1.1686631210446048 |
| Urban Background | Tuesday | 60 | 13.825750272013115 | 1.1482417694213842 |
| Urban Background | Wednesday | 60 | 15.218315734239635 | 1.2019059876749272 |
| Urban Traffic | Friday | 63 | 22.728345752304868 | 1.7188233145939933 |
| Urban Traffic | Monday | 62 | 19.83667771648376 | 1.5128362398477726 |
| Urban Traffic | Saturday | 64 | 20.278966843941102 | 1.6664586236035517 |
| Urban Traffic | Sunday | 64 | 15.975374368752773 | 1.3924442324652244 |
| Urban Traffic | Thursday | 63 | 22.091748317137196 | 1.5955261169138888 |
| Urban Traffic | Tuesday | 62 | 21.35401383872187 | 1.5428773992241047 |
| Urban Traffic | Wednesday | 63 | 22.345886253244075 | 1.6653178324751776 |