previous 14 days
O3 concentrations per day (µg/m3), 20/03/2026 - 02/04/2026
next 14 days


- Click on the figures in the table cells to get an evolution graph of daily concentrations
- Click on the date to get an interpolation map
- "NA" means no or not enough data were available

Codecity20/0321/0322/0323/0324/0325/0326/0327/0328/0329/0330/0331/0301/0402/04
41B011 Sint-Agatha-Berchem 91.5 76 90.5 85.5 97 82 79.5 78.5 83.5 81 85.5 75 84.5 78
41MEU1 Neder-Over-Heembeek 42.5 74 88 82 89.5 80 79.5 73 84.5 76 87 75.5 86 76.5
41N043 Voorhaven (Haren) 13 NA NA 76 83 75 76.5 62.5 80 73 84.5 71.5 74 65
41R001 Sint-Jans-Molenbeek 78.5 67 80 66.5 86 75.5 69.5 62 71 72 75 60.5 66.5 62
41R012 Ukkel 92.5 75.5 92 85 96.5 82.5 79 78.5 84.5 77 81 74.5 83.5 76.5
42N016 Dessel 96 81.5 92 95.5 99 82.5 84 80 87.5 80 87.5 83 93 79.5
42N027 Bree 95 81 86 100.5 62.5 81.5 73 84.5 86.5 85 87.5 80.5 69 73.5
42N035 Aarschot 101 83.5 95 92.5 104.5 85.5 85.5 85 87.5 84.5 89 83 92.5 78
42N040 Sint-Pieters-Leeuw 91 75.5 89 83 91 79.5 78 78 82 78 84 71.5 85.5 75
42N046 Gellik 46 NA NA NA 90.5 88 81.5 85 89.5 88 89 68.5 82.5 67
42N047 Hasselt 95 76 93 99 93.5 84.5 80 84 88.5 85.5 85.5 81.5 86.5 79
42R801 Borgerhout 94 79.5 90.5 73.5 92 83.5 80.5 77 85 79.5 87.5 72 89 78
42R811 Schoten NA NA NA 74.5 95.5 88 82 77.5 89.5 81.5 89.5 83.5 102 82.5
42R842 Mechelen (Hendrik Speecqvest) 79 70.5 84 72.5 93.5 79.5 74.5 73.5 82.5 76 84 72.5 83 74
44M705 Roeselare (Haven) 89 67 NA 82 99 86.5 82.5 79 88.5 83.5 86.5 82 NA 44
44N012 Moerkerke 85.5 61.5 79.5 82 93.5 86.5 83 81 86 83.5 88 NA 75 83.5
44N029 Houtem (Veurne) 70.5 71 46 80 88.5 83 83 80.5 86 81 88.5 81.5 63.5 85.5
44R701 Gent (Baudelopark) 96 69 94 85.5 107 85 77.5 76 85 81 86 73 83 81.5
44R710 Destelbergen 90 79.5 95.5 88.5 105 87.5 81 79 86.5 81 87 77 86 82.5
43N060 Havinnes 91 68.5 76 78 81.5 71 72.5 68.5 73 68 72.5 66 71 72.5
43N064 Rixensart 100.5 86.5 100 93.5 100 86 84 83 89.5 85.5 91 79 93 82
43N066 Eupen 84.5 83.5 93 95 94.5 86 69.5 80 78.5 81 78.5 70.5 85.5 66
43N070 Mons 105.5 80 89 82 83 77 78 65.5 85 73 81 70 81.5 77.5
43N073 Vezin 105 78.5 86 95 95.5 82.5 77.5 83 84 81 83 80 87.5 69
43N085 Vielsalm 104.5 88 93 95 93.5 79 75 75.5 74 77.5 72.5 71 84 72
43N093 Sinsin 93.5 90 92 99 100 85.5 80 82.5 88 86 86.5 84.5 85 66
43N100 Dourbes 108.5 100 95.5 107.5 106 90 86 89.5 94.5 89 89 93.5 97 76
43N113 Saint-Ode 108 92 93 98 100 90 86 86.5 85.5 85 86.5 87.5 89.5 86
43N121 Offagne 82 76.5 79 80 91.5 76 57 70 77 77.5 74.5 68 69.5 68.5
43N132 Habay-La-Neuve 103 89 91 93.5 96.5 82.5 77 80 82 78.5 82 85 87 79.5
43R221 Herstal 88 81 90 94.5 93.5 87 76 77.5 84.5 85 84.5 71 85.5 61
43R222 Liège (ISSeP) 93 86 93.5 95.5 97.5 89.5 78.5 82.5 87.5 87.5 84.5 74.5 84 59
43R240 Engis 90 81 91 94.5 95 85 71 82 84 80.5 77 75.5 78 56
43R401 Namur 89.5 79.5 84.5 93 96.5 86 79.5 83 85 82.5 84 80.5 85 65.5
45R502 Lodelinsart 98.5 74.5 87 82 91.5 79 74 73 81.5 75 77.5 68 81 66
 
Interpolated spatial average in :
Brussels8972878092817874837784728173
Flanders9374859098878181868187788278
Wallonia9883889396837779828081778369
Belgium9679869197857980848084788373
 
% of the population exposed to O3 concentrations > 180 μg/m³ in:
Brussels0%0%0%0%0%0%0%0%0%0%0%0%0%0%
Flanders0%0%0%0%0%0%0%0%0%0%0%0%0%0%
Wallonia0%0%0%0%0%0%0%0%0%0%0%0%0%0%
Belgium0%0%0%0%0%0%0%0%0%0%0%0%0%0%
 
% of the population exposed to O3 concentrations > 240 μg/m³ in:
Brussels0%0%0%0%0%0%0%0%0%0%0%0%0%0%
Flanders0%0%0%0%0%0%0%0%0%0%0%0%0%0%
Wallonia0%0%0%0%0%0%0%0%0%0%0%0%0%0%
Belgium0%0%0%0%0%0%0%0%0%0%0%0%0%0%

Color legend:Kleurlegende

These data are not validated : they should not be used for any study whatsoever
The use or publication of the data is allowed only when the source (www.irceline.be) is acknowledged

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