| Code | city | 23/03 | 24/03 | 25/03 | 26/03 | 27/03 | 28/03 | 29/03 | 30/03 | 31/03 | 01/04 | 02/04 | 03/04 | 04/04 | 05/04 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 41B011 | Sint-Agatha-Berchem | 87 | 74 | 86 | 58 | 60 | 68 | 69 | 80 | 74 | 83 | 98 | 99 | 110 | 98 | |
| 41MEU1 | Neder-Over-Heembeek | 86 | 75 | 89 | 57 | 60 | 66 | 72 | 82 | 77 | 82 | 97 | 97 | 116 | 100 | |
| 41N043 | Voorhaven (Haren) | 76 | 77 | 81 | 57 | 55 | 62 | 72 | 82 | 75 | 82 | 96 | 96 | 111 | 100 | |
| 41R001 | Sint-Jans-Molenbeek | 82 | 66 | 77 | 50 | 49 | 58 | 59 | 74 | 67 | 80 | 95 | 91 | 109 | 92 | |
| 41R012 | Ukkel | 84 | 77 | 92 | 59 | 60 | 70 | 74 | 85 | 78 | 81 | 102 | 100 | 117 | 106 | |
| 42N016 | Dessel | 85 | 80 | 92 | 66 | 83 | 76 | 77 | 82 | 88 | 87 | 99 | 107 | 117 | 95 | |
| 42N027 | Bree | 87 | 84 | 102 | 69 | 86 | 79 | 88 | 87 | 90 | 87 | 99 | 109 | 118 | 99 | |
| 42N035 | Aarschot | 94 | 78 | 97 | 66 | 79 | 80 | 74 | 84 | 85 | 87 | 102 | 106 | 121 | 101 | |
| 42N046 | Gellik | 85 | 78 | 104 | 66 | 87 | 82 | 92 | 87 | 90 | 88 | 99 | 103 | 125 | 96 | |
| 42N047 | Hasselt | 90 | 80 | 103 | 64 | 85 | 82 | 82 | 86 | 90 | 90 | 105 | 109 | 138 | 100 | |
| 42R801 | Borgerhout | 84 | 72 | 88 | 64 | 70 | 22 | NA | NA | NA | 81 | 92 | 97 | 116 | 99 | |
| 42R811 | Schoten | 88 | 86 | 90 | 66 | 75 | 72 | 74 | 87 | 84 | 89 | 99 | 107 | 118 | 99 | |
| 42R842 | Mechelen (Hendrik Speecqvest) | 88 | 73 | 86 | 52 | 64 | 65 | 71 | 82 | 76 | 83 | 98 | 99 | 114 | 91 | |
| 44M705 | Roeselare (Haven) | 88 | 91 | 92 | 63 | 88 | 71 | 82 | 91 | 86 | 83 | 95 | 97 | 124 | 93 | |
| 44N012 | Moerkerke | 72 | 67 | 68 | 44 | 56 | 61 | 66 | 66 | 58 | 77 | 91 | 97 | 119 | 81 | |
| 44N029 | Houtem (Veurne) | 83 | 84 | 71 | 69 | 81 | 63 | 70 | 84 | 88 | 75 | 47 | 98 | 117 | 78 | |
| 44R701 | Gent (Baudelopark) | 85 | 88 | 95 | 58 | 78 | 66 | 75 | 85 | 79 | 84 | 97 | 98 | 122 | 93 | |
| 44R710 | Destelbergen | 86 | 80 | 97 | 63 | 82 | 69 | 74 | 84 | 79 | 87 | 98 | 103 | 123 | 94 | |
| 43N060 | Havinnes | 77 | 70 | 88 | 57 | 79 | 67 | 70 | 76 | 83 | 76 | 88 | 98 | 114 | 100 | |
| 43N064 | Rixensart | 93 | 81 | 100 | 69 | 85 | 78 | 80 | 89 | 89 | 93 | 106 | 109 | 127 | 110 | |
| 43N066 | Eupen | 83 | 80 | 98 | 62 | 65 | 93 | 83 | 79 | 80 | 82 | 93 | 99 | 109 | 97 | |
| 43N070 | Mons | 80 | 65 | 85 | 61 | 85 | 69 | 77 | 84 | 85 | 85 | 98 | 106 | 124 | 108 | |
| 43N073 | Vezin | 82 | 69 | 89 | 53 | 56 | 69 | 66 | 72 | 79 | 83 | 90 | 102 | 119 | 103 | |
| 43N085 | Vielsalm | 86 | 82 | 112 | 72 | 100 | 100 | 91 | 86 | 86 | 89 | 100 | 108 | 111 | 111 | |
| 43N093 | Sinsin | 89 | 82 | 104 | 64 | 89 | 95 | 89 | 84 | 86 | 87 | 101 | 102 | 111 | 98 | |
| 43N100 | Dourbes | 86 | 80 | 107 | 64 | 93 | 83 | 79 | 87 | 86 | 89 | 104 | 105 | 111 | 108 | |
| 43N113 | Saint-Ode | 83 | 80 | 102 | 68 | 92 | 99 | 84 | 81 | 82 | 86 | 101 | 100 | 109 | 108 | |
| 43N121 | Offagne | 81 | 80 | 103 | 65 | 90 | 98 | 85 | 83 | 83 | 87 | 100 | 99 | 107 | 109 | |
| 43N132 | Habay-La-Neuve | NA | NA | NA | 64 | 88 | 93 | 80 | 78 | 79 | 78 | 94 | 94 | 107 | 102 | |
| 43R221 | Herstal | 84 | 79 | 99 | 58 | 60 | 85 | 87 | 85 | 84 | 85 | 97 | 103 | 108 | 94 | |
| 43R222 | Liège (ISSeP) | 87 | 78 | 99 | 60 | 65 | 74 | 88 | 84 | 83 | 84 | 97 | 100 | 109 | 96 | |
| 43R240 | Engis | 85 | 78 | 99 | 57 | 57 | 77 | 75 | 80 | 83 | 86 | 97 | 99 | 110 | 95 | |
| 43R401 | Namur | 91 | 77 | 97 | 58 | 66 | 79 | 74 | 85 | 82 | 81 | 92 | 95 | 106 | 96 | |
| 45R502 | Lodelinsart | 84 | 69 | 83 | 59 | 73 | 69 | 72 | 81 | 84 | 86 | 97 | 100 | 116 | 99 | |
| Interpolated spatial average in : | ||||||||||||||||
| Brussels | 83 | 73 | 85 | 58 | 57 | 65 | 69 | 81 | 77 | 83 | 99 | 99 | 113 | 99 | ||
| Flanders | 85 | 80 | 91 | 65 | 76 | 70 | 75 | 84 | 84 | 87 | 100 | 105 | 119 | 96 | ||
| Wallonia | 84 | 76 | 99 | 64 | 82 | 81 | 79 | 82 | 85 | 87 | 100 | 103 | 112 | 102 | ||
| Belgium | 84 | 78 | 95 | 65 | 79 | 76 | 77 | 83 | 84 | 87 | 100 | 104 | 115 | 99 | ||
| % 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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