| Code | city | 16/04 | 17/04 | 18/04 | 19/04 | 20/04 | 21/04 | 22/04 | 23/04 | 24/04 | 25/04 | 26/04 | 27/04 | 28/04 | 29/04 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 41B011 | Sint-Agatha-Berchem | 74 | 62 | 91 | 98 | 72 | 70 | 94 | 71 | 73 | 69 | 105 | 117 | 139 | 145 | |
| 41MEU1 | Neder-Over-Heembeek | 70 | 68 | 95 | 104 | 69 | 70 | 86 | 56 | 54 | 62 | 98 | 111 | 130 | 136 | |
| 41N043 | Voorhaven (Haren) | 71 | 60 | 90 | 105 | 64 | 69 | 88 | 62 | 63 | 64 | 102 | 101 | 132 | 135 | |
| 41R001 | Sint-Jans-Molenbeek | 71 | 65 | 89 | 98 | 65 | 71 | 89 | 68 | 63 | 64 | NA | 105 | 127 | 135 | |
| 41R012 | Ukkel | 73 | 60 | 89 | 101 | 63 | 68 | 92 | 70 | 70 | 61 | 103 | 112 | 87 | 111 | |
| 42N016 | Dessel | 65 | 70 | 97 | 93 | 99 | 70 | 92 | 77 | 35 | 61 | 105 | 113 | 127 | 122 | |
| 42N027 | Bree | 68 | 80 | 97 | 101 | 94 | 75 | 104 | 77 | 55 | 55 | 104 | 116 | 132 | 134 | |
| 42N035 | Aarschot | 80 | 70 | 99 | 107 | 83 | 76 | 99 | 83 | 61 | 47 | 109 | 119 | 131 | 139 | |
| 42N046 | Gellik | 72 | 77 | 99 | 100 | 86 | 77 | 105 | 81 | 61 | 56 | 109 | 114 | 126 | 139 | |
| 42N047 | Hasselt | 74 | 74 | 100 | 112 | 90 | 76 | 102 | 84 | 56 | 49 | NA | 122 | 132 | 148 | |
| 42R801 | Borgerhout | 72 | 54 | 89 | 97 | 92 | 77 | 90 | 76 | 60 | 86 | 104 | 119 | 127 | 127 | |
| 42R811 | Schoten | 76 | 65 | 100 | 97 | 96 | 79 | 87 | 64 | 58 | 83 | 101 | 116 | 125 | 129 | |
| 42R842 | Mechelen (Hendrik Speecqvest) | 72 | 64 | 95 | 101 | 80 | 67 | 81 | 60 | 59 | 67 | 100 | 109 | 120 | 134 | |
| 44M705 | Roeselare (Haven) | 85 | 87 | 93 | 102 | 60 | 83 | 92 | 87 | 80 | 83 | 97 | 103 | 120 | 136 | |
| 44N012 | Moerkerke | 84 | 83 | 100 | 98 | 76 | 72 | 84 | 85 | 80 | 78 | 90 | 89 | 105 | 130 | |
| 44N029 | Houtem (Veurne) | 79 | 84 | 98 | 94 | 63 | 63 | 83 | 84 | 85 | 80 | 82 | 97 | 116 | 122 | |
| 44R701 | Gent (Baudelopark) | 76 | 78 | 99 | 102 | 90 | 77 | 86 | 84 | 77 | 90 | 100 | 103 | 119 | 138 | |
| 44R710 | Destelbergen | 78 | 80 | 99 | 100 | 83 | 73 | 83 | 81 | 74 | 86 | 97 | 105 | 121 | 136 | |
| 43N060 | Havinnes | 74 | 81 | 90 | 91 | 63 | 70 | 87 | 80 | 64 | 85 | 95 | 111 | 131 | 134 | |
| 43N064 | Rixensart | 80 | 76 | 103 | 107 | 84 | 77 | 101 | 76 | 60 | 65 | 112 | 123 | 135 | 146 | |
| 43N066 | Eupen | 67 | 72 | 89 | 90 | 83 | 78 | 94 | 73 | 55 | 59 | 98 | 109 | 118 | 142 | |
| 43N070 | Mons | 65 | 75 | 95 | 96 | 63 | 60 | 85 | 69 | 73 | 64 | 105 | 130 | 147 | 141 | |
| 43N073 | Vezin | 79 | 80 | 96 | 95 | 89 | 74 | 96 | 83 | 64 | 67 | 106 | 122 | 133 | 143 | |
| 43N085 | Vielsalm | 79 | 86 | 89 | 96 | 97 | 85 | 91 | 76 | 64 | 89 | 103 | 106 | 128 | 131 | |
| 43N093 | Sinsin | 77 | 86 | 95 | 92 | 97 | 73 | 94 | 86 | 80 | 76 | 99 | 120 | 129 | 136 | |
| 43N100 | Dourbes | 79 | 85 | 88 | 90 | 90 | 69 | 95 | 93 | 69 | 85 | 102 | 117 | 129 | 143 | |
| 43N113 | Saint-Ode | 74 | 82 | 89 | 89 | 105 | 77 | 88 | 86 | 77 | 89 | 92 | 99 | 119 | 125 | |
| 43N121 | Offagne | 74 | 84 | 80 | 90 | 107 | 68 | 91 | 77 | 63 | 83 | 93 | 106 | 124 | 125 | |
| 43N132 | Habay-La-Neuve | 66 | 76 | 76 | 87 | 102 | 68 | 81 | 75 | 62 | 91 | 95 | 91 | 118 | 127 | |
| 43R221 | Herstal | 62 | 71 | 94 | 94 | 81 | 75 | 98 | 73 | 58 | 58 | 101 | 113 | 129 | 137 | |
| 43R222 | Liège (ISSeP) | 67 | 69 | 93 | 94 | 96 | 77 | 98 | 74 | 59 | 58 | 104 | 114 | 127 | 139 | |
| 43R240 | Engis | 64 | 66 | 90 | 93 | 83 | 70 | 88 | 66 | 52 | 54 | 100 | 113 | 125 | 135 | |
| 43R401 | Namur | 80 | 70 | 86 | 89 | 81 | 70 | 96 | 77 | 60 | 59 | 100 | 116 | 126 | 134 | |
| 45R502 | Lodelinsart | 70 | 74 | 90 | 94 | 81 | 62 | 85 | 76 | 55 | 61 | 102 | 119 | 134 | 141 | |
| Interpolated spatial average in : | ||||||||||||||||
| Brussels | 73 | 62 | 92 | 99 | 63 | 69 | 91 | 70 | 65 | 67 | 105 | 113 | 133 | 139 | ||
| Flanders | 77 | 75 | 99 | 98 | 79 | 74 | 93 | 79 | 69 | 76 | 101 | 109 | 126 | 134 | ||
| Wallonia | 73 | 79 | 90 | 93 | 82 | 72 | 92 | 79 | 66 | 76 | 107 | 110 | 128 | 135 | ||
| Belgium | 75 | 77 | 94 | 95 | 81 | 73 | 92 | 79 | 67 | 76 | 104 | 110 | 127 | 135 | ||
| % 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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