Statistical data set
Figure 1: Annual mean concentrations of NO2 in the UK, 1990 to 2025
Updated 30 June 2026
| Site type | Year | Mean concentration of NO2 (µg/m3) | CI | Lower Bound (95% confidence interval for 'All sites') | Upper Bound (95% confidence interval for 'All sites') |
|---|---|---|---|---|---|
| Rural Background | 1997 | 17.686948278641417 | 15.836476796917623 | 1.850471481723794 | 33.52342507555904 |
| Rural Background | 1998 | 14.483484598987197 | 6.125076391884707 | 8.358408207102489 | 20.608560990871904 |
| Rural Background | 1999 | 15.95375626523822 | 14.936056850139842 | 1.0176994150983774 | 30.88981311537806 |
| Rural Background | 2000 | 13.971204076813233 | 4.934370488097564 | 9.03683358871567 | 18.905574564910797 |
| Rural Background | 2001 | 15.474708605302071 | 5.145206832999082 | 10.32950177230299 | 20.619915438301152 |
| Rural Background | 2002 | 12.934627025714967 | 4.987932701949087 | 7.94669432376588 | 17.922559727664055 |
| Rural Background | 2003 | 14.940280717671753 | 4.744292816747687 | 10.195987900924067 | 19.68457353441944 |
| Rural Background | 2004 | 11.213787242772915 | 3.030747838569511 | 8.183039404203404 | 14.244535081342425 |
| Rural Background | 2005 | 10.35510577701316 | 2.7192215859087514 | 7.635884191104408 | 13.074327362921911 |
| Rural Background | 2006 | 10.449308527586217 | 2.8752972691026897 | 7.574011258483527 | 13.324605796688907 |
| Rural Background | 2007 | 10.452094495261182 | 2.476688079328883 | 7.9754064159323 | 12.928782574590064 |
| Rural Background | 2008 | 8.953736454052322 | 2.154343993422902 | 6.79939246062942 | 11.108080447475224 |
| Rural Background | 2009 | 8.994046701274382 | 2.1497330465183087 | 6.844313654756073 | 11.14377974779269 |
| Rural Background | 2010 | 9.371706814173265 | 2.7144952515075342 | 6.657211562665731 | 12.0862020656808 |
| Rural Background | 2011 | 9.226400455880995 | 2.7272767062706302 | 6.499123749610365 | 11.953677162151624 |
| Rural Background | 2012 | 9.731611538932711 | 3.114814090690635 | 6.616797448242076 | 12.846425629623345 |
| Rural Background | 2013 | 8.675177715357249 | 2.89348929030135 | 5.781688425055899 | 11.568667005658599 |
| Rural Background | 2014 | 7.9799167962852975 | 2.5498597876575144 | 5.430057008627783 | 10.529776583942812 |
| Rural Background | 2015 | 7.038872606460024 | 2.388114727535061 | 4.6507578789249635 | 9.426987333995084 |
| Rural Background | 2016 | 8.671214983737393 | 2.463093039355791 | 6.2081219443816025 | 11.134308023093183 |
| Rural Background | 2017 | 7.583856868102635 | 2.4420960975174046 | 5.141760770585231 | 10.02595296562004 |
| Rural Background | 2018 | 7.157888036119297 | 2.0450861956891395 | 5.112801840430157 | 9.202974231808437 |
| Rural Background | 2019 | 7.1847242112056735 | 2.2473383493526877 | 4.937385861852986 | 9.43206256055836 |
| Rural Background | 2020 | 5.526065486394602 | 1.9096999608576242 | 3.6163655255369775 | 7.435765447252226 |
| Rural Background | 2021 | 5.758472264055988 | 1.8195043458709277 | 3.9389679181850603 | 7.577976609926916 |
| Rural Background | 2022 | 6.041750516591967 | 1.7262536652478262 | 4.3154968513441405 | 7.768004181839793 |
| Rural Background | 2023 | 5.1845492229323105 | 1.8737024489626575 | 3.310846773969653 | 7.058251671894968 |
| Rural Background | 2024 | 4.6715170878455945 | 1.5789542714620326 | 3.0925628163835617 | 6.250471359307627 |
| Rural Background | 2025 | 4.955676191834742 | 1.7784519380090462 | 3.1772242538256963 | 6.734128129843788 |
| Urban Background | 1990 | 53.79893864989998 | 13.870858024539638 | 39.928080625360344 | 67.66979667443962 |
| Urban Background | 1991 | 58.690954278388105 | 13.33657925504179 | 45.354375023346314 | 72.0275335334299 |
| Urban Background | 1992 | 59.75299844025324 | 8.059958077084122 | 51.69304036316912 | 67.81295651733737 |
| Urban Background | 1993 | 52.20461275626263 | 4.375017465516854 | 47.82959529074577 | 56.57963022177948 |
| Urban Background | 1994 | 49.036977077139085 | 3.611386536629817 | 45.42559054050927 | 52.6483636137689 |
| Urban Background | 1995 | 48.02974649415015 | 3.618984473191071 | 44.41076202095908 | 51.64873096734122 |
| Urban Background | 1996 | 47.37690937665374 | 3.202696339827851 | 44.17421303682589 | 50.579605716481595 |
| Urban Background | 1997 | 46.04241650984854 | 3.0102437855460464 | 43.0321727243025 | 49.05266029539459 |
| Urban Background | 1998 | 40.67055015715819 | 2.929733037721304 | 37.74081711943688 | 43.600283194879495 |
| Urban Background | 1999 | 39.70149469137918 | 3.0659350769474822 | 36.6355596144317 | 42.767429768326664 |
| Urban Background | 2000 | 35.87412260875327 | 2.6589582826093427 | 33.21516432614393 | 38.53308089136261 |
| Urban Background | 2001 | 35.670343829886534 | 2.319525631181793 | 33.350818198704744 | 37.989869461068324 |
| Urban Background | 2002 | 32.705882686112325 | 2.3493808943746584 | 30.356501791737667 | 35.05526358048699 |
| Urban Background | 2003 | 35.092444205612715 | 2.7296433896663235 | 32.36280081594639 | 37.82208759527904 |
| Urban Background | 2004 | 32.24445677140644 | 2.7747159132078356 | 29.469740858198605 | 35.019172684614276 |
| Urban Background | 2005 | 32.22305387381452 | 3.179781277150604 | 29.04327259666392 | 35.402835150965124 |
| Urban Background | 2006 | 31.666491071216587 | 3.16279175932246 | 28.503699311894128 | 34.82928283053905 |
| Urban Background | 2007 | 28.233062671137553 | 2.9380519912400427 | 25.29501067989751 | 31.171114662377597 |
| Urban Background | 2008 | 28.04246969442369 | 2.6960605141416947 | 25.346409180281995 | 30.738530208565386 |
| Urban Background | 2009 | 28.87578730080728 | 2.930472307531615 | 25.945314993275662 | 31.806259608338895 |
| Urban Background | 2010 | 31.093382293304032 | 3.406624974306304 | 27.686757318997728 | 34.500007267610336 |
| Urban Background | 2011 | 26.72221088641617 | 3.120358809016145 | 23.601852077400025 | 29.842569695432317 |
| Urban Background | 2012 | 26.579149117739533 | 3.142850062585563 | 23.43629905515397 | 29.721999180325096 |
| Urban Background | 2013 | 25.279715254256363 | 2.9619582167555407 | 22.317757037500822 | 28.241673471011904 |
| Urban Background | 2014 | 24.79922862605246 | 3.330192021272163 | 21.4690366047803 | 28.129420647324622 |
| Urban Background | 2015 | 22.892732058550518 | 2.7414443205524077 | 20.15128773799811 | 25.634176379102925 |
| Urban Background | 2016 | 23.32265939863937 | 2.6026020938382364 | 20.720057304801134 | 25.925261492477606 |
| Urban Background | 2017 | 21.74204695134224 | 2.535994766188442 | 19.206052185153798 | 24.27804171753068 |
| Urban Background | 2018 | 20.002379344452986 | 2.0854466640784364 | 17.91693268037455 | 22.087826008531422 |
| Urban Background | 2019 | 19.56350789426593 | 2.0622956024156656 | 17.501212291850262 | 21.625803496681595 |
| Urban Background | 2020 | 15.06691545274616 | 1.4679508339238088 | 13.598964618822352 | 16.53486628666997 |
| Urban Background | 2021 | 15.865568639017743 | 1.5586684794218182 | 14.306900159595925 | 17.42423711843956 |
| Urban Background | 2022 | 15.647309988897552 | 1.404311156498657 | 14.242998832398895 | 17.051621145396208 |
| Urban Background | 2023 | 14.256446636363387 | 1.2281269687914749 | 13.028319667571912 | 15.484573605154862 |
| Urban Background | 2024 | 13.127164238455524 | 1.195182575262882 | 11.931981663192643 | 14.322346813718406 |
| Urban Background | 2025 | 13.53506983415061 | 1.1138591341319173 | 12.421210700018692 | 14.648928968282528 |
| Roadside | 1997 | 59.71508818953606 | 9.117784773654726 | 50.597303415881335 | 68.8328729631908 |
| Roadside | 1998 | 59.019197854688905 | 9.18861985080471 | 49.8305780038842 | 68.20781770549361 |
| Roadside | 1999 | 61.81444003378047 | 8.149121991764488 | 53.66531804201598 | 69.96356202554496 |
| Roadside | 2000 | 57.2570242053674 | 8.084417914581994 | 49.17260629078541 | 65.34144211994939 |
| Roadside | 2001 | 54.310351840716756 | 6.868613377225077 | 47.44173846349168 | 61.17896521794183 |
| Roadside | 2002 | 49.40470162224479 | 7.618837913838522 | 41.78586370840627 | 57.023539536083305 |
| Roadside | 2003 | 54.823275609475495 | 9.971699525506581 | 44.851576083968915 | 64.79497513498208 |
| Roadside | 2004 | 52.182026244672656 | 9.043168633930431 | 43.13885761074222 | 61.22519487860309 |
| Roadside | 2005 | 53.620065492637714 | 9.24095865520151 | 44.379106837436204 | 62.861024147839224 |
| Roadside | 2006 | 54.20622552774155 | 10.006038305409328 | 44.200187222332225 | 64.21226383315089 |
| Roadside | 2007 | 52.73554113863269 | 10.644783387979205 | 42.09075775065349 | 63.38032452661189 |
| Roadside | 2008 | 49.87652951209842 | 9.214010934804534 | 40.66251857729389 | 59.090540446902956 |
| Roadside | 2009 | 45.79915120060413 | 8.02792725101922 | 37.77122394958491 | 53.82707845162335 |
| Roadside | 2010 | 46.227337333611956 | 7.305950172425328 | 38.92138716118663 | 53.53328750603728 |
| Roadside | 2011 | 41.16570887779084 | 7.054604836199681 | 34.11110404159116 | 48.22031371399052 |
| Roadside | 2012 | 41.440285255295684 | 6.794303051998464 | 34.64598220329722 | 48.234588307294146 |
| Roadside | 2013 | 38.88387951987189 | 6.265297433447632 | 32.618582086424254 | 45.149176953319525 |
| Roadside | 2014 | 38.360041029067965 | 7.073432480553231 | 31.286608548514735 | 45.433473509621194 |
| Roadside | 2015 | 36.54008902165922 | 5.15457991163909 | 31.38550911002013 | 41.69466893329831 |
| Roadside | 2016 | 37.647956433364065 | 4.227101277282904 | 33.42085515608116 | 41.87505771064697 |
| Roadside | 2017 | 33.67734589405281 | 3.340826551266136 | 30.336519342786676 | 37.018172445318946 |
| Roadside | 2018 | 32.79977395332849 | 3.200437361256607 | 29.599336592071882 | 36.000211314585094 |
| Roadside | 2019 | 31.0788203341777 | 2.6197395852343144 | 28.459080748943386 | 33.69855991941201 |
| Roadside | 2020 | 22.925543544155932 | 1.8665796906222556 | 21.058963853533676 | 24.792123234778188 |
| Roadside | 2021 | 24.75897554653201 | 2.0300239936235007 | 22.72895155290851 | 26.788999540155512 |
| Roadside | 2022 | 23.561710048178114 | 1.8340126793865414 | 21.72769736879157 | 25.395722727564657 |
| Roadside | 2023 | 21.964544700159323 | 1.8548496094550753 | 20.109695090704246 | 23.8193943096144 |
| Roadside | 2024 | 20.65519690147203 | 1.5649791799963173 | 19.090217721475714 | 22.22017608146835 |
| Roadside | 2025 | 20.388133406789507 | 1.549769587084883 | 18.838363819704625 | 21.93790299387439 |