| 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 | 42 | 49 | 65 | 39 | 29 | 50 | 33 | 32 | 48 | 65 | 59 | 43 | 56 | NA | |
| 41MEU1 | Neder-Over-Heembeek | 41 | 54 | 66 | 40 | 25 | 53 | 28 | 16 | 49 | 61 | 60 | 47 | 54 | NA | |
| 41N043 | Voorhaven (Haren) | 31 | 44 | 56 | 35 | 18 | 43 | 24 | 13 | 40 | 51 | 51 | 41 | 48 | NA | |
| 41R001 | Sint-Jans-Molenbeek | 32 | 39 | 54 | 28 | 17 | 38 | 15 | 23 | 37 | 52 | 49 | 36 | 52 | NA | |
| 41R012 | Ukkel | 44 | 54 | 66 | 45 | 26 | 57 | 32 | 43 | 51 | 67 | 60 | 41 | 64 | NA | |
| 42N016 | Dessel | 32 | 39 | 59 | 26 | 18 | 47 | 40 | 28 | 33 | 54 | 61 | 44 | 55 | NA | |
| 42N027 | Bree | 23 | 32 | 47 | 20 | 16 | 37 | 26 | 19 | 44 | 53 | 65 | 45 | 59 | NA | |
| 42N035 | Aarschot | 44 | 50 | 64 | 47 | 24 | 60 | 35 | 19 | 56 | 65 | 68 | 47 | 62 | NA | |
| 42N040 | Sint-Pieters-Leeuw | 51 | 56 | 71 | 45 | 29 | 62 | 33 | 58 | 58 | 72 | 63 | 62 | 64 | NA | |
| 42N046 | Gellik | 31 | 46 | 48 | 14 | 26 | 62 | 42 | 27 | 60 | 47 | 63 | 35 | 67 | NA | |
| 42N047 | Hasselt | 34 | 48 | 63 | 28 | 24 | 53 | 46 | 31 | 57 | 55 | 72 | 40 | 67 | NA | |
| 42R801 | Borgerhout | 33 | 28 | NA | 27 | 23 | 31 | 37 | 18 | 40 | 54 | 52 | 37 | 49 | NA | |
| 42R811 | Schoten | 37 | 47 | 64 | 32 | 24 | 41 | 37 | 22 | 53 | 61 | 60 | 37 | 51 | NA | |
| 42R842 | Mechelen (Hendrik Speecqvest) | 39 | 47 | 62 | 32 | 30 | 45 | 28 | 17 | 48 | 61 | 61 | 44 | 52 | NA | |
| 44M705 | Roeselare (Haven) | 47 | 56 | 60 | 49 | 29 | 45 | 26 | 48 | 62 | 73 | 59 | 43 | 54 | NA | |
| 44N012 | Moerkerke | 45 | 56 | 64 | 43 | 21 | 53 | 30 | 19 | 47 | 73 | 59 | 39 | 49 | NA | |
| 44N029 | Houtem (Veurne) | 48 | 54 | 60 | 47 | 29 | 67 | 41 | 57 | 57 | 60 | 52 | 48 | 55 | NA | |
| 44R701 | Gent (Baudelopark) | 45 | 57 | 69 | 35 | 24 | 51 | 33 | 23 | 42 | 69 | 55 | 48 | 55 | NA | |
| 44R710 | Destelbergen | 49 | 58 | 71 | 38 | 27 | 55 | 36 | 25 | 48 | 70 | 61 | 48 | 56 | NA | |
| 43N060 | Havinnes | 48 | 56 | 74 | 40 | 31 | 57 | 26 | 54 | 55 | 68 | 56 | 48 | NA | NA | |
| 43N064 | Rixensart | 52 | 63 | 71 | 67 | 35 | 66 | 36 | 56 | 57 | 74 | 70 | 51 | NA | NA | |
| 43N066 | Eupen | 68 | 59 | 61 | 40 | 16 | 67 | 45 | 39 | 63 | 46 | 53 | 57 | 60 | NA | |
| 43N070 | Mons | 48 | 53 | 76 | 43 | 24 | 61 | 34 | 38 | NA | NA | NA | NA | NA | NA | |
| 43N073 | Vezin | 53 | 56 | 67 | 81 | 40 | 62 | 33 | 33 | 59 | 73 | 73 | 53 | 73 | NA | |
| 43N085 | Vielsalm | 48 | 44 | 60 | 27 | 23 | 65 | 47 | 50 | 53 | 41 | 48 | 55 | 59 | NA | |
| 43N093 | Sinsin | 49 | 57 | 67 | 41 | 20 | 64 | 54 | 43 | 58 | 77 | 74 | 61 | 77 | NA | |
| 43N100 | Dourbes | 49 | 60 | 71 | 57 | 40 | 76 | 53 | 68 | 66 | 79 | 71 | 65 | NA | NA | |
| 43N113 | Saint-Ode | 44 | 44 | 66 | 29 | 60 | 69 | 63 | 66 | 66 | 60 | 65 | 59 | 79 | NA | |
| 43N121 | Offagne | 27 | 44 | 53 | 22 | 30 | 57 | 49 | 52 | 48 | 46 | 51 | 53 | 54 | NA | |
| 43N132 | Habay-La-Neuve | 19 | 37 | 59 | 21 | 27 | 46 | 65 | 62 | 53 | 52 | 57 | 68 | 73 | NA | |
| 43R221 | Herstal | 41 | 44 | 59 | 26 | 20 | 54 | 38 | 21 | 44 | 43 | 56 | 47 | 60 | NA | |
| 43R222 | Liège (ISSeP) | 57 | 55 | 60 | 28 | 22 | 66 | 37 | 26 | 60 | 58 | 66 | 51 | 71 | NA | |
| 43R240 | Engis | 55 | 51 | 57 | 36 | 32 | 63 | 28 | 18 | 52 | 56 | 73 | 42 | 67 | NA | |
| 43R401 | Namur | 44 | 53 | 66 | 74 | 37 | 61 | 31 | 28 | 55 | 67 | 68 | 51 | 71 | NA | |
| 45R502 | Lodelinsart | 38 | 51 | 66 | 53 | 28 | 56 | 28 | 52 | 47 | 64 | 61 | 41 | NA | NA | |
| Interpolated spatial average in : | ||||||||||||||||
| Brussels | 39 | 47 | 62 | 38 | 20 | 49 | 22 | 27 | 46 | 61 | 57 | 42 | 57 | 57 | ||
| Flanders | 43 | 47 | 62 | 37 | 24 | 51 | 31 | 28 | 54 | 63 | 61 | 46 | 57 | 57 | ||
| Wallonia | 44 | 51 | 64 | 37 | 25 | 63 | 42 | 44 | 57 | 60 | 61 | 52 | 65 | 65 | ||
| Belgium | 43 | 49 | 63 | 37 | 25 | 58 | 37 | 37 | 55 | 61 | 61 | 49 | 61 | 61 | ||
| % 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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