| Code | city | 29/04 | 30/04 | 01/05 | 02/05 | 03/05 | 04/05 | 05/05 | 06/05 | 07/05 | 08/05 | 09/05 | 10/05 | 11/05 | 12/05 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 41B011 | Sint-Agatha-Berchem | 83 | 90 | 124 | 71 | 86 | 75 | 94 | 65 | 101 | 81 | 101 | 121 | 127 | 116 | |
| 41MEU1 | Neder-Over-Heembeek | 83 | 95 | 118 | 63 | 79 | 81 | 91 | 52 | 101 | 77 | 103 | 120 | 127 | 123 | |
| 41N043 | Voorhaven (Haren) | 80 | 85 | 123 | 70 | 87 | 75 | 88 | 53 | 103 | 73 | 104 | 125 | 131 | 115 | |
| 41R001 | Sint-Jans-Molenbeek | 80 | 87 | 120 | 63 | 80 | 75 | 86 | 53 | 92 | 72 | 90 | 115 | 124 | 114 | |
| 41R012 | Ukkel | 87 | 91 | 132 | 77 | 85 | 74 | 89 | 53 | 108 | 77 | 104 | 130 | 131 | 116 | |
| 42N016 | Dessel | 96 | 116 | 151 | 97 | 75 | 92 | 76 | NA | NA | 81 | 100 | 132 | 141 | 133 | |
| 42N027 | Bree | 93 | 107 | 140 | 100 | 86 | 82 | 98 | 60 | 110 | 82 | 111 | 127 | 133 | 122 | |
| 42N035 | Aarschot | 92 | 104 | 142 | 82 | 92 | 81 | 104 | 67 | 109 | 74 | 110 | 126 | 131 | 134 | |
| 42N040 | Sint-Pieters-Leeuw | 86 | 86 | 121 | 77 | 92 | 84 | 95 | 78 | 101 | 83 | 101 | 129 | 129 | 119 | |
| 42N046 | Gellik | 90 | 105 | 139 | 79 | 95 | 88 | 103 | 63 | 112 | 88 | 119 | 128 | 134 | 125 | |
| 42N047 | Hasselt | 95 | 110 | 143 | 71 | 95 | 86 | 102 | 73 | 107 | 80 | 110 | 130 | 138 | 132 | |
| 42R801 | Borgerhout | 83 | 92 | 119 | 73 | 85 | 79 | 98 | 74 | 105 | 89 | 107 | 121 | 128 | 130 | |
| 42R842 | Mechelen (Hendrik Speecqvest) | 85 | 97 | 119 | 64 | 79 | 78 | 93 | 73 | 100 | 95 | 107 | 113 | 123 | 124 | |
| 44M705 | Roeselare (Haven) | 93 | 92 | 120 | 79 | 94 | 98 | 104 | 75 | 97 | 86 | 110 | 123 | 130 | 132 | |
| 44N012 | Moerkerke | 92 | 98 | 103 | 83 | 95 | 91 | 94 | 62 | 75 | NA | NA | NA | 115 | 121 | |
| 44N029 | Houtem (Veurne) | 92 | 88 | 92 | 77 | 91 | 89 | 97 | 73 | 98 | 85 | 96 | 101 | 119 | 131 | |
| 44R701 | Gent (Baudelopark) | 88 | 96 | 82 | NA | 96 | 94 | 102 | 68 | 102 | 81 | 101 | NA | NA | NA | |
| 44R710 | Destelbergen | 90 | 95 | 111 | 72 | 96 | 93 | 102 | 69 | 92 | 73 | 110 | 141 | 131 | 130 | |
| 43N060 | Havinnes | 83 | 89 | 109 | 75 | 92 | 77 | 87 | 80 | 101 | 82 | 102 | 123 | 127 | 112 | |
| 43N064 | Rixensart | 92 | 101 | 128 | 72 | 94 | 79 | 101 | 55 | 107 | 82 | NA | NA | NA | NA | |
| 43N066 | Eupen | 93 | 102 | 131 | 83 | 85 | 84 | 90 | 61 | 94 | 81 | 105 | 117 | 116 | 117 | |
| 43N070 | Mons | 76 | 80 | 125 | 65 | 72 | 78 | 81 | 63 | 105 | 83 | 102 | 121 | 127 | 101 | |
| 43N073 | Vezin | 93 | 105 | 132 | 74 | 92 | 76 | 92 | 79 | 103 | 80 | 105 | 129 | 130 | 119 | |
| 43N085 | Vielsalm | 101 | 106 | 126 | 89 | 82 | 87 | 87 | 55 | 85 | 81 | 101 | 109 | 117 | 127 | |
| 43N093 | Sinsin | 94 | 103 | 128 | 83 | 95 | 82 | 88 | 84 | 100 | 81 | 116 | 130 | 117 | 121 | |
| 43N100 | Dourbes | 95 | 109 | 122 | 80 | 98 | 86 | 88 | 93 | 105 | 90 | 109 | 131 | 127 | 121 | |
| 43N113 | Saint-Ode | 96 | 102 | 105 | 95 | 89 | 80 | 87 | 81 | 93 | 80 | 102 | 107 | 121 | 121 | |
| 43N121 | Offagne | 91 | 100 | 120 | 86 | 95 | 73 | 85 | 88 | 96 | 81 | 103 | 110 | 127 | 121 | |
| 43N132 | Habay-La-Neuve | 92 | 100 | 118 | 80 | 90 | 77 | 77 | 82 | 90 | 82 | 107 | 112 | 131 | 128 | |
| 43R221 | Herstal | 88 | 99 | 129 | 66 | 89 | 81 | 94 | 46 | 95 | 79 | 110 | 121 | 123 | 120 | |
| 43R222 | Liège (ISSeP) | 93 | 99 | 129 | 67 | 91 | 83 | 92 | 63 | 101 | 80 | 107 | 120 | 120 | 119 | |
| 43R240 | Engis | 94 | 94 | 125 | 63 | 84 | 81 | 86 | 62 | 98 | 76 | 110 | 124 | 124 | 120 | |
| 43R401 | Namur | 87 | 96 | 121 | 77 | 91 | 74 | 92 | 81 | 95 | 82 | 106 | 123 | 123 | 120 | |
| 45R502 | Lodelinsart | 87 | 97 | 125 | 66 | 85 | 69 | 82 | 74 | 97 | 75 | 103 | 119 | 128 | 116 | |
| Interpolated spatial average in : | ||||||||||||||||
| Brussels | 85 | 87 | 125 | 69 | 86 | 76 | 90 | 54 | 102 | 76 | 101 | 123 | 128 | 116 | ||
| Flanders | 93 | 100 | 124 | 79 | 93 | 87 | 101 | 67 | 108 | 83 | 111 | 127 | 129 | 126 | ||
| Wallonia | 93 | 99 | 122 | 76 | 91 | 79 | 87 | 74 | 97 | 81 | 106 | 119 | 124 | 118 | ||
| Belgium | 93 | 100 | 123 | 77 | 92 | 82 | 93 | 71 | 102 | 82 | 108 | 123 | 126 | 122 | ||
| % of the population exposed to O3 concentrations > 180 μg/m³ in: | ||||||||||||||||
| Brussels | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | ||
| Flanders | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | ||
| Wallonia | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | ||
| Belgium | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | ||
| % of the population exposed to O3 concentrations > 240 μg/m³ in: | ||||||||||||||||
| Brussels | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | ||
| Flanders | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | ||
| Wallonia | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | ||
| Belgium | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | ||
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