| Code | city | 22/01 | 23/01 | 24/01 | 25/01 | 26/01 | 27/01 | 28/01 | 29/01 | 30/01 | 31/01 | 01/02 | 02/02 | 03/02 | 04/02 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 41B011 | Sint-Agatha-Berchem | 79 | 77 | 76 | 61 | 74 | 62 | 53 | 43 | 71 | 76 | 65 | 64 | 60 | 64 | |
| 41MEU1 | Neder-Over-Heembeek | 76 | 71 | 71 | 49 | 74 | 61 | 49 | 41 | 67 | 68 | 66 | 58 | 53 | 59 | |
| 41N043 | Voorhaven (Haren) | NA | NA | NA | NA | NA | NA | NA | 42 | 66 | 69 | 62 | 63 | 56 | 65 | |
| 41R001 | Sint-Jans-Molenbeek | 71 | 67 | 63 | 41 | 65 | 54 | 42 | 41 | 56 | 71 | 56 | 55 | 52 | 57 | |
| 41R012 | Ukkel | 77 | 74 | 77 | 53 | 76 | 62 | 53 | 52 | 72 | 74 | 65 | 65 | 53 | 62 | |
| 42N016 | Dessel | 62 | 64 | 78 | 55 | 78 | 59 | 61 | 45 | 73 | 74 | 71 | 59 | 55 | 62 | |
| 42N027 | Bree | 82 | 81 | 79 | 61 | 78 | 65 | 41 | 53 | 73 | 79 | 70 | 62 | 61 | 66 | |
| 42N035 | Aarschot | 69 | 68 | 76 | 63 | 74 | 62 | 61 | 50 | 70 | 78 | 67 | 64 | 62 | 66 | |
| 42N040 | Sint-Pieters-Leeuw | 80 | 77 | 77 | 65 | 76 | 63 | 57 | 53 | 74 | 81 | 69 | 65 | 63 | 66 | |
| 42N046 | Gellik | 82 | 82 | 80 | 64 | 77 | 70 | 50 | 51 | 72 | 74 | 71 | 59 | 65 | 67 | |
| 42N047 | Hasselt | 82 | 81 | 77 | 58 | 77 | 66 | 54 | 53 | 74 | 77 | 71 | 61 | 63 | 66 | |
| 42R801 | Borgerhout | 65 | 53 | 70 | 44 | 68 | 46 | 33 | 30 | 65 | 66 | 64 | 55 | 56 | 59 | |
| 42R842 | Mechelen (Hendrik Speecqvest) | 67 | 58 | 70 | 56 | 70 | 52 | 48 | 34 | 56 | 68 | 62 | 62 | 62 | NA | |
| 44M705 | Roeselare (Haven) | 75 | NA | 75 | 53 | 78 | 63 | 46 | 36 | 68 | 79 | 71 | 66 | 63 | 68 | |
| 44N012 | Moerkerke | 77 | NA | 77 | 57 | 81 | 61 | 47 | 40 | 70 | 81 | 74 | 70 | 62 | 65 | |
| 44N029 | Houtem (Veurne) | 79 | NA | 77 | 54 | 76 | 63 | 42 | 32 | 71 | 77 | 74 | 70 | 62 | 66 | |
| 44R701 | Gent (Baudelopark) | 74 | NA | 75 | 49 | 77 | NA | 45 | 47 | 68 | 76 | 63 | 63 | 61 | NA | |
| 44R710 | Destelbergen | 69 | NA | 75 | 46 | 76 | 64 | 49 | 48 | 70 | 77 | 70 | 63 | 62 | 66 | |
| 43N060 | Havinnes | 81 | 78 | 78 | 55 | 75 | 62 | 48 | 41 | 74 | 75 | 72 | 66 | 61 | 66 | |
| 43N064 | Rixensart | 81 | 77 | 77 | 59 | 76 | 66 | 57 | 50 | 75 | 80 | 72 | 60 | 58 | 62 | |
| 43N066 | Eupen | 74 | 76 | 72 | 68 | 73 | 62 | 77 | 62 | 66 | 72 | 73 | 65 | 52 | 58 | |
| 43N070 | Mons | 75 | 72 | 72 | 44 | 72 | 55 | 47 | 42 | 66 | 70 | 74 | 56 | 55 | 60 | |
| 43N073 | Vezin | 78 | 77 | 76 | 67 | 76 | 67 | 65 | 59 | 71 | 82 | 76 | 58 | 64 | 66 | |
| 43N085 | Vielsalm | 72 | 75 | 76 | 65 | 71 | 57 | 59 | 52 | 67 | 74 | 70 | 58 | 60 | 64 | |
| 43N093 | Sinsin | 82 | 80 | 82 | 74 | 78 | 65 | 67 | 60 | 76 | 81 | 76 | 61 | 66 | 70 | |
| 43N100 | Dourbes | 81 | 79 | 83 | 71 | 78 | 72 | 65 | 64 | 77 | 85 | 76 | 61 | 66 | 67 | |
| 43N113 | Saint-Ode | 81 | 81 | 81 | 78 | 78 | 69 | 63 | 62 | 78 | 83 | 77 | 62 | 66 | 65 | |
| 43N121 | Offagne | 76 | 77 | 78 | 63 | 73 | 63 | 58 | 60 | 66 | 80 | 68 | 52 | 62 | 63 | |
| 43N132 | Habay-La-Neuve | 77 | 72 | 78 | 60 | 78 | 61 | 43 | 57 | 57 | 81 | 76 | 55 | 61 | 62 | |
| 43R221 | Herstal | 75 | 77 | 71 | 61 | 73 | 60 | 64 | 48 | 59 | 68 | 68 | 50 | 49 | 59 | |
| 43R222 | Liège (ISSeP) | 77 | 76 | 71 | 57 | 73 | 69 | 60 | 56 | 62 | 76 | 71 | 56 | 58 | 64 | |
| 43R240 | Engis | 73 | 77 | 77 | 65 | 73 | 63 | 67 | 53 | 70 | 75 | 73 | 57 | 45 | 51 | |
| 43R401 | Namur | 79 | 78 | 72 | 66 | 74 | 57 | 59 | 48 | 65 | 80 | 68 | 56 | 64 | 65 | |
| 45R502 | Lodelinsart | 67 | 70 | 67 | 50 | 68 | 55 | 53 | 49 | 59 | 71 | 61 | 45 | 49 | 56 | |
| Interpolated spatial average in : | ||||||||||||||||
| Brussels | 76 | 73 | 73 | 54 | 71 | 58 | 49 | 46 | 66 | 74 | 62 | 61 | 56 | 61 | ||
| Flanders | 82 | 79 | 85 | 56 | 79 | 63 | 54 | 45 | 74 | 79 | 73 | 64 | 60 | 66 | ||
| Wallonia | 78 | 77 | 80 | 63 | 76 | 64 | 58 | 56 | 68 | 79 | 73 | 58 | 59 | 62 | ||
| Belgium | 79 | 78 | 82 | 60 | 78 | 63 | 56 | 51 | 71 | 79 | 73 | 61 | 60 | 64 | ||
| % 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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