| 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 | 32 | 61 | 68 | 66 | 67 | 81 | 76 | 66 | 53 | 48 | 61 | 50 | 42 | 49 | |
| 41MEU1 | Neder-Over-Heembeek | 22 | 55 | 62 | 60 | 68 | 76 | 76 | 59 | 51 | 45 | 55 | 49 | 36 | 40 | |
| 41N043 | Voorhaven (Haren) | 26 | 56 | 61 | 60 | 65 | 76 | 74 | 60 | 52 | 37 | 56 | 46 | 3 | NA | |
| 41R001 | Sint-Jans-Molenbeek | 29 | 57 | 67 | 58 | 69 | 77 | 78 | 60 | 47 | 41 | 50 | 42 | 9 | NA | |
| 41R012 | Ukkel | 37 | 63 | 72 | 62 | 72 | 82 | 80 | 68 | 54 | 48 | 59 | 48 | 19 | NA | |
| 42N016 | Dessel | 32 | 60 | 74 | 76 | 81 | 78 | 74 | 60 | 63 | 46 | 73 | 65 | 42 | 45 | |
| 42N027 | Bree | 37 | 65 | 76 | 71 | 83 | 87 | 79 | 74 | 65 | 58 | 68 | 60 | 47 | 51 | |
| 42N035 | Aarschot | 40 | 69 | 84 | 73 | 75 | 85 | 79 | 74 | 64 | 51 | 65 | 59 | 45 | 49 | |
| 42N040 | Sint-Pieters-Leeuw | 43 | 63 | 80 | 70 | 73 | 81 | 78 | 70 | 71 | 61 | 64 | 59 | 49 | 45 | |
| 42N046 | Gellik | 37 | 65 | 82 | 77 | 77 | 84 | 78 | 74 | 68 | 64 | 64 | 57 | 44 | 50 | |
| 42N047 | Hasselt | 34 | 65 | 76 | 66 | 78 | 84 | 80 | 72 | 60 | 59 | 70 | 63 | 42 | 49 | |
| 42R801 | Borgerhout | 9 | 63 | 63 | 66 | 74 | 80 | 79 | 60 | 58 | 40 | 58 | 49 | 35 | 46 | |
| 42R811 | Schoten | 10 | 62 | 64 | 65 | 69 | 83 | 79 | 65 | 59 | 42 | 62 | 57 | 39 | 51 | |
| 42R842 | Mechelen (Hendrik Speecqvest) | 13 | 63 | 66 | 76 | 71 | 83 | 79 | 67 | 47 | 44 | 54 | 52 | 37 | 43 | |
| 44M705 | Roeselare (Haven) | 20 | 70 | 70 | 72 | 71 | 85 | 74 | 71 | 73 | 52 | 62 | 52 | 42 | 36 | |
| 44N012 | Moerkerke | 19 | 71 | 72 | 66 | 73 | 87 | 76 | 67 | 73 | 54 | 66 | 54 | 44 | 39 | |
| 44N029 | Houtem (Veurne) | 32 | 75 | 75 | 78 | 71 | 87 | 77 | 71 | 77 | 72 | 61 | 52 | 37 | 46 | |
| 44R701 | Gent (Baudelopark) | 17 | 67 | 71 | 73 | 77 | 83 | 79 | 66 | 69 | 45 | 63 | 51 | 43 | 37 | |
| 44R710 | Destelbergen | 21 | 66 | 74 | 70 | 76 | 87 | 79 | 69 | 72 | 49 | 67 | 56 | 49 | 42 | |
| 43N060 | Havinnes | 26 | 58 | 63 | 64 | 72 | 75 | 71 | 64 | 69 | 59 | 59 | 44 | 43 | 34 | |
| 43N064 | Rixensart | 30 | 63 | 73 | 67 | 75 | 82 | 78 | 71 | 59 | 55 | 63 | 57 | 49 | 47 | |
| 43N066 | Eupen | 70 | 61 | 68 | 75 | 68 | 78 | 74 | 70 | 69 | 61 | 71 | 65 | 46 | 54 | |
| 43N070 | Mons | 23 | 56 | 60 | 66 | 68 | 74 | 75 | 58 | 62 | 42 | 55 | 43 | 35 | 33 | |
| 43N073 | Vezin | 48 | 65 | 68 | 71 | 75 | 83 | 77 | 70 | 64 | 54 | 61 | 61 | 41 | 41 | |
| 43N085 | Vielsalm | 69 | 61 | 67 | 69 | 75 | 78 | 74 | 71 | 68 | 62 | 65 | 64 | 42 | 37 | |
| 43N093 | Sinsin | 42 | 64 | 69 | 83 | 78 | 90 | 80 | 74 | 74 | 62 | 60 | 55 | 47 | 47 | |
| 43N100 | Dourbes | 50 | 65 | 68 | 76 | 74 | 83 | 77 | 71 | 69 | 58 | 60 | 51 | 45 | 42 | |
| 43N113 | Saint-Ode | 54 | 72 | 69 | 79 | 79 | 85 | 79 | 75 | 73 | 66 | 67 | 62 | 47 | 36 | |
| 43N121 | Offagne | 42 | 63 | 64 | 73 | 73 | 82 | 76 | 70 | 68 | 60 | 65 | 58 | 42 | 37 | |
| 43N132 | Habay-La-Neuve | 44 | 61 | 63 | 61 | 72 | 82 | 73 | 70 | 65 | 58 | 66 | 51 | 39 | 33 | |
| 43R221 | Herstal | 45 | 57 | 63 | 69 | 70 | 80 | 74 | 65 | 56 | 44 | 57 | 54 | 27 | 45 | |
| 43R222 | Liège (ISSeP) | 60 | 66 | 72 | 72 | 77 | 91 | 83 | 74 | 59 | 54 | 66 | 54 | 39 | 50 | |
| 43R240 | Engis | 47 | 61 | 64 | 70 | 72 | 81 | 75 | 67 | 62 | 54 | 52 | 55 | 42 | 50 | |
| 43R401 | Namur | 41 | 64 | 66 | 67 | 75 | 80 | 74 | 70 | 61 | 56 | 54 | 53 | 36 | 41 | |
| 45R502 | Lodelinsart | 32 | 50 | 59 | 55 | 68 | 70 | 67 | 53 | 56 | 48 | 48 | 48 | 29 | 28 | |
| Interpolated spatial average in : | ||||||||||||||||
| Brussels | 30 | 61 | 70 | 60 | 70 | 81 | 80 | 65 | 51 | 45 | 55 | 49 | 42 | 42 | ||
| Flanders | 27 | 67 | 75 | 69 | 74 | 87 | 85 | 71 | 67 | 54 | 64 | 57 | 45 | 47 | ||
| Wallonia | 40 | 63 | 70 | 68 | 72 | 82 | 80 | 70 | 65 | 58 | 61 | 55 | 43 | 40 | ||
| Belgium | 34 | 65 | 72 | 68 | 73 | 85 | 82 | 71 | 66 | 56 | 62 | 56 | 44 | 43 | ||
| % 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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