Statistical data set
Figure 5: Annual mean concentrations of PM10 in the UK, 1992 to 2025
Updated 30 June 2026
| Site type | Year | Number of sites | Mean concentration of PM10 (µg/m3) | CI | Lower Bound (95% confidence interval for 'All sites') | Upper Bound (95% confidence interval for 'All sites') |
|---|---|---|---|---|---|---|
| Urban Background | 1992 | 3 | 36.14855486568851 | 7.1672865232307705 | 28.98126834245774 | 43.31584138891928 |
| Urban Background | 1993 | 6 | 35.21320698933412 | 4.077449193551504 | 31.135757795782613 | 39.29065618288562 |
| Urban Background | 1994 | 13 | 32.37278514785897 | 2.894085280672525 | 29.478699867186446 | 35.2668704285315 |
| Urban Background | 1995 | 13 | 31.25181086763161 | 1.9100174123446747 | 29.341793455286936 | 33.161828279976284 |
| Urban Background | 1996 | 16 | 32.050148492738764 | 1.7065488723843985 | 30.343599620354365 | 33.75669736512316 |
| Urban Background | 1997 | 26 | 29.850606977156342 | 1.2719769725299674 | 28.578630004626376 | 31.12258394968631 |
| Urban Background | 1998 | 33 | 25.933556936795988 | 1.006275466749482 | 24.927281470046506 | 26.93983240354547 |
| Urban Background | 1999 | 33 | 24.032113362775956 | 0.8763896772405402 | 23.155723685535417 | 24.908503040016495 |
| Urban Background | 2000 | 34 | 22.945222332616716 | 0.9731938234140535 | 21.972028509202662 | 23.91841615603077 |
| Urban Background | 2001 | 43 | 23.299754181095725 | 1.2085431406065514 | 22.091211040489174 | 24.508297321702276 |
| Urban Background | 2002 | 40 | 22.569196721829865 | 0.8667043425845111 | 21.702492379245353 | 23.435901064414377 |
| Urban Background | 2003 | 39 | 24.96045758540026 | 1.093858308280563 | 23.866599277119697 | 26.054315893680823 |
| Urban Background | 2004 | 41 | 21.748812349140223 | 0.9457281028799207 | 20.8030842462603 | 22.694540452020146 |
| Urban Background | 2005 | 39 | 22.238431674300465 | 1.1240450178573758 | 21.114386656443088 | 23.36247669215784 |
| Urban Background | 2006 | 41 | 23.853097269355697 | 1.0399074816788 | 22.813189787676897 | 24.893004751034496 |
| Urban Background | 2007 | 35 | 21.61186179705534 | 1.0448103008591625 | 20.56705149619618 | 22.6566720979145 |
| Urban Background | 2008 | 31 | 18.68472055713163 | 0.8760276066026745 | 17.808692950528954 | 19.560748163734306 |
| Urban Background | 2009 | 22 | 18.852300641992368 | 1.089490510953481 | 17.762810131038886 | 19.94179115294585 |
| Urban Background | 2010 | 20 | 18.6991231690297 | 1.3637286714129893 | 17.33539449761671 | 20.06285184044269 |
| Urban Background | 2011 | 24 | 19.84286807256227 | 1.2411514640836472 | 18.601716608478622 | 21.084019536645915 |
| Urban Background | 2012 | 25 | 16.976701364734353 | 1.1826791424375493 | 15.794022222296803 | 18.159380507171903 |
| Urban Background | 2013 | 21 | 16.879193810793442 | 1.2780551117367838 | 15.601138699056659 | 18.157248922530226 |
| Urban Background | 2014 | 24 | 16.773201989697323 | 0.979983150260983 | 15.79321883943634 | 17.753185139958305 |
| Urban Background | 2015 | 23 | 15.157977488072857 | 1.0318564791809024 | 14.126121008891955 | 16.18983396725376 |
| Urban Background | 2016 | 22 | 15.57595767064438 | 1.1326043985224856 | 14.443353272121895 | 16.708562069166867 |
| Urban Background | 2017 | 24 | 14.22653795646246 | 1.0000657921008824 | 13.226472164361578 | 15.226603748563342 |
| Urban Background | 2018 | 22 | 14.873189983053463 | 0.9889712825661751 | 13.884218700487288 | 15.862161265619637 |
| Urban Background | 2019 | 26 | 15.026478632553394 | 0.8449630575682763 | 14.181515574985117 | 15.87144169012167 |
| Urban Background | 2020 | 40 | 13.221853820352171 | 0.675681589663775 | 12.546172230688397 | 13.897535410015946 |
| Urban Background | 2021 | 38 | 12.971945449549507 | 0.59151690099748 | 12.380428548552027 | 13.563462350546986 |
| Urban Background | 2022 | 44 | 13.956842759038972 | 0.5878088552897124 | 13.36903390374926 | 14.544651614328684 |
| Urban Background | 2023 | 53 | 12.273542302034349 | 0.5030534976610459 | 11.770488804373302 | 12.776595799695395 |
| Urban Background | 2024 | 57 | 11.826146189533004 | 0.4170641093934197 | 11.409082080139584 | 12.243210298926424 |
| Urban Background | 2025 | 69 | 13.236897933072823 | 0.39768884734475524 | 12.839209085728069 | 13.634586780417578 |
| Roadside | 1997 | 4 | 36.73135880040706 | 7.629441904830186 | 29.10191689557687 | 44.360800705237246 |
| Roadside | 1998 | 7 | 32.97519491455539 | 4.470492439159247 | 28.50470247539614 | 37.44568735371463 |
| Roadside | 1999 | 7 | 31.736103852748283 | 6.350421809907833 | 25.38568204284045 | 38.086525662656115 |
| Roadside | 2000 | 7 | 30.833075976655348 | 7.576781976746704 | 23.256293999908642 | 38.40985795340205 |
| Roadside | 2001 | 7 | 31.55093257217086 | 5.578504600462072 | 25.97242797170879 | 37.12943717263293 |
| Roadside | 2002 | 9 | 29.167475259785125 | 5.088923497021416 | 24.07855176276371 | 34.25639875680654 |
| Roadside | 2003 | 10 | 30.47050835649568 | 6.489799172952847 | 23.980709183542835 | 36.96030752944853 |
| Roadside | 2004 | 10 | 26.30201534169401 | 6.318928492078027 | 19.983086849615983 | 32.62094383377204 |
| Roadside | 2005 | 10 | 27.391911283660615 | 6.06108767406778 | 21.330823609592834 | 33.4529989577284 |
| Roadside | 2006 | 10 | 29.89991093571985 | 6.906540628343321 | 22.993370307376527 | 36.80645156406317 |
| Roadside | 2007 | 9 | 26.12529624874351 | 7.682274634123763 | 18.443021614619745 | 33.807570882867275 |
| Roadside | 2008 | 13 | 22.39409560916307 | 3.7914736641059754 | 18.602621945057095 | 26.185569273269046 |
| Roadside | 2009 | 16 | 20.266084958362487 | 2.6809973024455065 | 17.58508765591698 | 22.947082260807996 |
| Roadside | 2010 | 16 | 21.659442713376993 | 2.8399469956046755 | 18.81949571777232 | 24.499389708981667 |
| Roadside | 2011 | 15 | 22.924186174616622 | 3.24886460612274 | 19.67532156849388 | 26.173050780739363 |
| Roadside | 2012 | 19 | 20.04144488740753 | 2.007952182412458 | 18.03349270499507 | 22.04939706981999 |
| Roadside | 2013 | 16 | 20.44818410579826 | 2.270840886797353 | 18.177343219000907 | 22.71902499259561 |
| Roadside | 2014 | 15 | 18.740210469650115 | 2.0852499175453514 | 16.654960552104765 | 20.825460387195466 |
| Roadside | 2015 | 21 | 17.231054502087083 | 1.3508011287246822 | 15.8802533733624 | 18.581855630811766 |
| Roadside | 2016 | 25 | 18.47210530763098 | 1.7443931218712014 | 16.727712185759778 | 20.21649842950218 |
| Roadside | 2017 | 29 | 17.248447437850043 | 1.4974772588896423 | 15.7509701789604 | 18.745924696739685 |
| Roadside | 2018 | 30 | 18.545331062053346 | 1.1576948511665168 | 17.38763621088683 | 19.703025913219864 |
| Roadside | 2019 | 37 | 17.993980603019736 | 1.272222821304657 | 16.72175778171508 | 19.26620342432439 |
| Roadside | 2020 | 36 | 16.33014705569905 | 1.2164253001793504 | 15.1137217555197 | 17.5465723558784 |
| Roadside | 2021 | 34 | 15.89658736433486 | 1.1897720442875892 | 14.70681532004727 | 17.08635940862245 |
| Roadside | 2022 | 35 | 16.90345904475588 | 1.3722879592977784 | 15.531171085458102 | 18.27574700405366 |
| Roadside | 2023 | 36 | 15.26621871795244 | 1.2362992225944467 | 14.029919495357992 | 16.502517940546888 |
| Roadside | 2024 | 36 | 14.657544100058011 | 1.1188021837261017 | 13.53874191633191 | 15.776346283784113 |
| Roadside | 2025 | 40 | 15.849526888230223 | 1.173161189844879 | 14.676365698385343 | 17.022688078075102 |