| Code | city | 25/08 | 26/08 | 27/08 | 28/08 | 29/08 | 30/08 | 31/08 | 01/09 | 02/09 | 03/09 | 04/09 | 05/09 | 06/09 | 07/09 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 41B011 | Sint-Agatha-Berchem | 72 | 83 | 114 | 124 | 92 | 75 | 101 | 121 | 91 | 58 | 56 | 77 | 27 | 86 | |
| 41MEU1 | Neder-Over-Heembeek | 68 | 80 | 115 | 118 | 93 | 74 | 99 | 124 | 91 | 61 | 59 | 74 | 31 | 86 | |
| 41N043 | Voorhaven (Haren) | 72 | 68 | 107 | 109 | 92 | 76 | 106 | 128 | 89 | 56 | 60 | 74 | 32 | 86 | |
| 41R001 | Sint-Jans-Molenbeek | 70 | 77 | 103 | 106 | 85 | 71 | 97 | 123 | 89 | 61 | 53 | 71 | 39 | 81 | |
| 41R012 | Ukkel | 70 | 75 | 103 | 112 | 93 | 73 | 105 | 103 | 88 | 56 | 54 | 72 | 30 | 71 | |
| 42N016 | Dessel | 75 | 85 | 133 | 127 | 117 | 79 | 102 | 162 | 110 | 72 | 70 | 105 | 36 | 116 | |
| 42N027 | Bree | 75 | 85 | 116 | 120 | 127 | 72 | 98 | 148 | 105 | 74 | 87 | 129 | 46 | 95 | |
| 42N035 | Aarschot | 78 | 86 | 115 | 124 | 112 | 77 | 109 | 148 | 112 | 81 | 71 | 110 | 47 | 100 | |
| 42N040 | Sint-Pieters-Leeuw | 72 | 82 | 116 | 111 | 92 | 73 | 104 | 121 | 93 | 63 | 64 | 79 | 43 | 84 | |
| 42N046 | Gellik | 79 | 89 | 120 | 119 | 141 | 70 | 110 | 131 | 109 | 80 | 76 | 113 | 74 | 98 | |
| 42N047 | Hasselt | 78 | 90 | 121 | 118 | 132 | 72 | 101 | 142 | 106 | 76 | 79 | 112 | 78 | 105 | |
| 42R801 | Borgerhout | 65 | 75 | 99 | 117 | 88 | 75 | 88 | 128 | 90 | 59 | 62 | 89 | 30 | 86 | |
| 42R811 | Schoten | 70 | 83 | 113 | 131 | 94 | 79 | 91 | 138 | 105 | 58 | 57 | 93 | 24 | 106 | |
| 42R842 | Mechelen (Hendrik Speecqvest) | 71 | 67 | 111 | 121 | 86 | 70 | 91 | 135 | 94 | 53 | 49 | 88 | 32 | 92 | |
| 44M705 | Roeselare (Haven) | 77 | 82 | 117 | 127 | 107 | 83 | 105 | 123 | 94 | 58 | 80 | 71 | 59 | 74 | |
| 44N012 | Moerkerke | 75 | 80 | 118 | 135 | 84 | 102 | 95 | 136 | 107 | 65 | 83 | 85 | 39 | 90 | |
| 44N029 | Houtem (Veurne) | 74 | 74 | 115 | 128 | 80 | 101 | 100 | 128 | 82 | 78 | 73 | 88 | 70 | 81 | |
| 44R701 | Gent (Baudelopark) | 71 | NA | NA | NA | 86 | 88 | 105 | 138 | 102 | 56 | 62 | 79 | 41 | 90 | |
| 44R710 | Destelbergen | 70 | 87 | 108 | 127 | 81 | 84 | 100 | 132 | 103 | 33 | 13 | 18 | 4 | 18 | |
| 43N060 | Havinnes | 68 | 80 | 102 | 106 | 87 | 78 | 93 | 114 | 93 | 52 | 62 | 73 | 56 | 74 | |
| 43N064 | Rixensart | 74 | 79 | 117 | 111 | 107 | 74 | 103 | 120 | 96 | 68 | 67 | 71 | 32 | 83 | |
| 43N066 | Eupen | 71 | 77 | 98 | 112 | 131 | 67 | 104 | 126 | 106 | 78 | 69 | 113 | 49 | NA | |
| 43N070 | Mons | 55 | 63 | 99 | 88 | 80 | 72 | 87 | 101 | 74 | 39 | 61 | 62 | 34 | 57 | |
| 43N073 | Vezin | 72 | 77 | 107 | 111 | 124 | 65 | 112 | 128 | 107 | 74 | 67 | 84 | 51 | 114 | |
| 43N085 | Vielsalm | 68 | 72 | 99 | 119 | 120 | 72 | 96 | 131 | 101 | 70 | 58 | 105 | 59 | 87 | |
| 43N093 | Sinsin | 72 | 75 | 106 | 107 | 127 | 72 | 99 | 126 | 99 | 77 | 61 | 84 | 46 | 91 | |
| 43N100 | Dourbes | 73 | 76 | 104 | 105 | 111 | 69 | 105 | 121 | 87 | 73 | 60 | 76 | 53 | 83 | |
| 43N113 | Saint-Ode | 71 | 82 | 101 | 113 | 114 | 71 | 99 | 134 | 80 | 77 | 77 | 95 | 62 | 89 | |
| 43N121 | Offagne | 71 | 79 | 101 | 100 | 101 | 61 | 104 | 120 | 83 | 73 | 62 | 83 | 53 | 89 | |
| 43N132 | Habay-La-Neuve | 71 | 84 | 103 | 104 | 102 | 89 | 94 | 143 | 87 | 79 | 74 | NA | 64 | 95 | |
| 43R221 | Herstal | 72 | 76 | 102 | 108 | 124 | 63 | 113 | 128 | 102 | 70 | 76 | 101 | 46 | 88 | |
| 43R222 | Liège (ISSeP) | 73 | 77 | 103 | 115 | 127 | 67 | 122 | 133 | 115 | 74 | 78 | 114 | 47 | 93 | |
| 43R240 | Engis | 67 | 75 | 102 | 108 | 123 | 59 | 116 | 129 | 100 | 67 | 54 | 99 | 38 | 86 | |
| 43R401 | Namur | 73 | 78 | 104 | 103 | 120 | 61 | 98 | 118 | 98 | 69 | 65 | 73 | 39 | 80 | |
| 45R502 | Lodelinsart | 64 | 73 | 105 | 98 | 95 | 63 | 101 | 114 | 84 | 60 | 58 | 63 | 32 | 73 | |
| Interpolated spatial average in : | ||||||||||||||||
| Brussels | 71 | 77 | 108 | 112 | 92 | 73 | 103 | 119 | 90 | 59 | 56 | 74 | 31 | 79 | ||
| Flanders | 75 | 84 | 116 | 124 | 100 | 83 | 102 | 134 | 103 | 62 | 66 | 87 | 41 | 85 | ||
| Wallonia | 70 | 78 | 105 | 107 | 108 | 70 | 101 | 122 | 93 | 69 | 62 | 86 | 48 | 83 | ||
| Belgium | 72 | 81 | 110 | 114 | 105 | 76 | 101 | 127 | 97 | 66 | 63 | 86 | 45 | 84 | ||
| % 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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