previous 14 days
O3 concentrations per day (µg/m3), 18/09/2026 - 01/10/2026
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

Codecity18/0919/0920/0921/0922/0923/0924/0925/0926/0927/0928/0929/0930/0901/10
41B011 Sint-Agatha-Berchem 71.5 67 70 79.5 69 90.5 79.5 97 77 98 53 98.5 75.5 70.5
41MEU1 Neder-Over-Heembeek 69 61.5 73.5 83.5 68.5 89.5 73 96.5 76 94.5 57 101.5 70 69
41N043 Voorhaven (Haren) 65 62.5 68 77.5 60.5 88 64 86.5 67.5 86.5 49 81.5 63.5 61.5
41R001 Sint-Jans-Molenbeek 64 63 69 69.5 61.5 82 71 91 67 91.5 49 91 77 63
41R012 Ukkel 69 68 69.5 82 66.5 90 79 94.5 74.5 91.5 58 95 73.5 74.5
42N016 Dessel 71.5 65 71.5 77 76 88 78.5 95 79 97 57 119 81.5 69.5
42N027 Bree 75 78.5 81 82.5 79 97 83.5 100 90.5 102.5 76.5 122.5 100 69
42N035 Aarschot 77.5 75.5 77.5 82 73.5 100.5 85.5 109.5 83.5 114 73 116 94.5 80
42N040 Sint-Pieters-Leeuw 71.5 68 67.5 86.5 67.5 48.5 83 99 80.5 96 52.5 99.5 75.5 77.5
42N046 Gellik 72.5 80.5 76 85.5 80 96.5 83 101 109.5 98 82.5 112.5 98.5 73
42N047 Hasselt 75 76 70 78.5 76.5 97 80.5 98.5 97 99.5 68.5 115 93.5 70.5
42R801 Borgerhout 67.5 63.5 71.5 72.5 67.5 90.5 76.5 93 81 106.5 53.5 98 67.5 77
42R811 Schoten 75 66 76.5 77 66 94 75 105 79.5 115 51 116 76.5 70.5
42R842 Mechelen (Hendrik Speecqvest) 69.5 65 72 75.5 64.5 78.5 62.5 85 73.5 99 52 96.5 71.5 63.5
44M705 Roeselare (Haven) 83.5 72 81.5 91 68.5 98 79.5 112 86 118.5 70 93 59.5 79
44N012 Moerkerke 80.5 75 76 83.5 75 88 84 106.5 93.5 115 66.5 101.5 62 79.5
44N029 Houtem (Veurne) 73.5 69.5 75.5 89.5 83.5 86.5 78 105 95 105.5 70 94.5 69.5 80
44R701 Gent (Baudelopark) 74.5 65.5 75.5 84 70 91 75 105.5 82.5 115.5 62.5 108.5 73 74
44R710 Destelbergen 79 67.5 76.5 87.5 73.5 93 81.5 108.5 83.5 115 59.5 111.5 71.5 77.5
43N060 Havinnes 78.5 63.5 70.5 89 71.5 89.5 84.5 93 78.5 97.5 46.5 95 71 78.5
43N064 Rixensart 78 78 74.5 89.5 78 94 75 101.5 89.5 101 70.5 105 85 82.5
43N066 Eupen 64.5 78 63.5 78 78 82 76.5 94.5 101 98.5 102.5 102.5 100 68.5
43N070 Mons 52.5 60.5 61.5 84.5 70 75.5 77 75.5 75 68 53.5 80.5 64.5 57
43N073 Vezin 72 87 66.5 86.5 78 91 76.5 96.5 107.5 91 79 103 89.5 71
43N085 Vielsalm 55 75.5 48 69 59 72.5 75.5 92 90 99.5 85 96 91 42
43N093 Sinsin 74.5 87.5 69 94 87 91.5 81 102.5 113.5 95 95.5 108 95.5 75
43N100 Dourbes 84.5 105 75.5 103.5 90.5 98 89.5 108 127 103.5 97 106.5 98.5 89
43N113 Saint-Ode 72.5 89 68 92 85 88 82 105 104.5 99 98 108.5 96 65
43N121 Offagne 73 87.5 58.5 93.5 84.5 101.5 84 99.5 104 97 101.5 101.5 92.5 69
43N132 Habay-La-Neuve 63 79 47 85 83 84 78.5 99 103 94.5 110 97.5 89 48
43R221 Herstal 70.5 82 69 83 85.5 89.5 82 93 99 94 89.5 103 86.5 68
43R222 Liège (ISSeP) 74.5 84 70.5 75 65 69 63 74 90.5 73 74.5 81 72.5 51.5
43R240 Engis 66.5 74 56.5 70 68.5 82 72 92.5 99.5 85.5 72.5 104.5 85.5 57.5
43R401 Namur 73.5 87 65 87.5 74 88.5 73 94.5 103 92.5 75 100 88 74
45R502 Lodelinsart 64 79 69 84 75 81 84 91.5 100.5 91 65 95.5 78 65
 
Interpolated spatial average in :
Brussels7067708066887495749355957271
Flanders7570758372918010284104611057574
Wallonia6979628577858095979282988664
Belgium72756884758880989197721018168
 
% 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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