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O3 concentrations per day (µg/m3), 15/05/2026 - 28/05/2026
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- 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
[O3]"ozone day" : day with at least one exeedance in Belgium of the EU threshold for information of the public (180 μg/m3)

Codecity15/0516/0517/0518/0519/0520/0521/0522/0523/0524/0525/05[O3]
26/05[O3]
27/0528/05
41B011 Sint-Agatha-Berchem 85.5 92 67.5 77.5 69.5 83.5 88 119 116.5 126 124.5 177 127 129.5
41MEU1 Neder-Over-Heembeek 84.5 88 63.5 71.5 65 74.5 88 129.5 119 123.5 125.5 162.5 122.5 136.5
41N043 Voorhaven (Haren) 79 84.5 59.5 69 59 74.5 80 120 112 119 122 145.5 111.5 120
41R001 Sint-Jans-Molenbeek 75.5 84.5 64.5 59.5 NA 77.5 84 113 125.5 124 126.5 166 128 130.5
41R012 Ukkel 87 89 67 75.5 69 80 86 116 118 123 131.5 171.5 121 117.5
42N016 Dessel 90 93 73.5 78.5 71 84 98 126.5 129 121 147 156.5 118.5 141
42N027 Bree 90.5 98.5 77 93 77 89.5 106 135.5 125.5 124.5 148.5 142.5 115 131
42N035 Aarschot 90.5 97.5 76.5 86.5 70 88 103.5 123 147 132.5 140.5 140 122 145.5
42N040 Sint-Pieters-Leeuw 84 90 69.5 77.5 68.5 79.5 92 115 117.5 121.5 124 166 126.5 126
42N046 Gellik 94 99.5 73.5 89.5 68.5 87.5 92.5 127.5 120.5 129 148 147 128.5 129
42N047 Hasselt 86.5 97.5 72 84.5 72 84.5 95 119 122.5 128 144.5 143 118.5 138
42R801 Borgerhout 86.5 89 68 77 67 81 87 126.5 132 124 125 188 120.5 68.5
42R811 Schoten 91 95 73 82.5 71.5 86.5 93.5 135.5 138 123.5 127.5 180 120 144.5
42R842 Mechelen (Hendrik Speecqvest) 83.5 90 68 70 66.5 74.5 82.5 119.5 117.5 116 121 172 114 133.5
44M705 Roeselare (Haven) 90.5 93.5 87.5 86.5 69 89 91 128.5 130 148 186 184.5 153 145
44N012 Moerkerke 89.5 94 77.5 86.5 73 90 92 136.5 131 146 159.5 185.5 122 144.5
44N029 Houtem (Veurne) 92 92 80.5 87 76.5 83 93.5 128.5 124 140.5 158.5 194.5 122 147.5
44R701 Gent (Baudelopark) 90.5 90.5 73 81.5 71.5 85.5 99 126.5 141 148.5 175 202.5 149.5 149
44R710 Destelbergen 85 90.5 72 78.5 72 86.5 98 123.5 142 143 172 197.5 147.5 150.5
43N060 Havinnes 80.5 85 60 72 60.5 69.5 85 103 117.5 117 120 135 135 130
43N064 Rixensart 91 93 78.5 82 73.5 89.5 100.5 118 125.5 114.5 133 145.5 120 127.5
43N066 Eupen 80 87 71 75.5 67 79.5 93.5 115.5 122 117.5 140.5 131 120.5 118
43N070 Mons 77.5 76.5 59.5 59.5 57.5 57.5 85 93.5 97 34.5 NA 147 127 122.5
43N073 Vezin 84 87.5 64 73 65.5 81 94 113 116.5 124 130 129 135.5 121.5
43N085 Vielsalm 77.5 84.5 68.5 66.5 63.5 64.5 81.5 109 114.5 109 118 114.5 123 114.5
43N093 Sinsin 88.5 91 67.5 77.5 66 79 87.5 111.5 106.5 126 140.5 137 130.5 126
43N100 Dourbes 91.5 90.5 67.5 83 77 84 91.5 110.5 108.5 127 130.5 123 155 126
43N113 Saint-Ode 85 87.5 75 84 72 75 84 112 119.5 109 129 132.5 127.5 117
43N121 Offagne 63.5 76.5 58 60 59.5 65.5 42.5 70 68.5 74.5 NA NA 118.5 117.5
43N132 Habay-La-Neuve 80.5 82 69.5 76 71.5 75.5 87 115.5 121 110.5 120.5 136.5 135.5 105.5
43R221 Herstal 81 93.5 74.5 84.5 69 85 93 122 123.5 134.5 148 141 127 119
43R222 Liège (ISSeP) 84 92 74 77 67 82.5 98 118 121 136.5 147.5 145 134 124
43R240 Engis 74 79 62 67 62.5 80.5 88 107.5 106.5 130.5 135.5 138.5 127.5 119.5
43R401 Namur 86.5 89.5 68.5 78 66.5 82.5 93.5 108 119 118.5 127.5 124 132.5 120.5
45R502 Lodelinsart 79.5 81.5 62 65.5 64.5 67 89.5 96 96 123 131 132 128 133
 
Interpolated spatial average in :
Brussels83886676698187116116119126157121125
Flanders88917381708594124125128141160124137
Wallonia82846572667686102107110124129129118
Belgium85876976688089112115118131143126126
 
% 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%13%0%0%
Wallonia0%0%0%0%0%0%0%0%0%0%<1%<1%0%0%
Belgium0%0%0%0%0%0%0%0%0%0%<1%7%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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