| Code | city | 05/12 | 06/12 | 07/12 | 08/12 | 09/12 | 10/12 | 11/12 | 12/12 | 13/12 | 14/12 | 15/12 | 16/12 | 17/12 | 18/12 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 41B011 | Sint-Agatha-Berchem | 56 | 71 | 70 | 59 | 38 | 41 | 35 | 33 | 26 | 39 | 54 | 62 | 48 | 52 | |
| 41MEU1 | Neder-Over-Heembeek | 47 | 71 | 62 | 49 | 38 | 42 | 34 | 33 | 24 | 25 | 47 | 57 | 49 | 53 | |
| 41N043 | Voorhaven (Haren) | 55 | 76 | 69 | 57 | 40 | 46 | 36 | 34 | 21 | 28 | NA | 44 | 46 | 54 | |
| 41R001 | Sint-Jans-Molenbeek | 53 | 70 | 67 | 53 | 37 | 34 | 31 | 34 | 22 | 28 | 48 | 60 | 46 | 55 | |
| 41R012 | Ukkel | 54 | 76 | 73 | 55 | 42 | 40 | 36 | 35 | 25 | 27 | 52 | 58 | 52 | 57 | |
| 42N016 | Dessel | 48 | 74 | 67 | 52 | 46 | 54 | 46 | 50 | 27 | 28 | 45 | 59 | 50 | 56 | |
| 42N027 | Bree | 53 | 79 | 76 | 48 | 40 | 49 | 42 | 35 | 26 | 38 | 51 | 64 | 54 | 57 | |
| 42N035 | Aarschot | 51 | 74 | 74 | 59 | 46 | 51 | 41 | 39 | 31 | 44 | 56 | 65 | 54 | 60 | |
| 42N040 | Sint-Pieters-Leeuw | 57 | 75 | 71 | 63 | 41 | 41 | 39 | 40 | 32 | 35 | 55 | 61 | 56 | 56 | |
| 42N046 | Gellik | 57 | 78 | 74 | 51 | 46 | 41 | 34 | 23 | 23 | 41 | 54 | 63 | 56 | 59 | |
| 42N047 | Hasselt | 53 | 76 | 72 | 53 | 44 | 44 | 37 | 26 | 23 | 34 | 48 | 61 | 55 | 61 | |
| 42R801 | Borgerhout | 65 | 76 | 68 | 48 | 42 | 46 | 44 | 41 | 19 | 36 | 53 | 60 | 54 | 55 | |
| 42R811 | Schoten | 61 | 69 | 70 | 54 | 41 | 52 | 43 | 41 | 24 | 36 | 54 | 63 | 54 | 57 | |
| 42R842 | Mechelen (Hendrik Speecqvest) | 59 | 76 | 72 | 59 | 43 | 42 | 39 | 40 | 24 | 40 | 55 | 62 | 51 | 58 | |
| 44M705 | Roeselare (Haven) | 75 | 74 | 72 | 64 | 49 | 49 | 47 | 29 | 38 | 50 | 60 | 64 | 56 | 69 | |
| 44N012 | Moerkerke | 79 | 79 | 74 | 63 | 42 | 53 | 50 | 38 | 35 | 58 | 57 | 70 | 58 | 72 | |
| 44N029 | Houtem (Veurne) | 76 | 73 | 71 | 68 | 51 | 53 | 50 | 51 | 40 | 67 | 66 | 72 | 59 | 73 | |
| 44R701 | Gent (Baudelopark) | 77 | 77 | 74 | 64 | 43 | 44 | 43 | 36 | 23 | 38 | 57 | 67 | 57 | 56 | |
| 44R710 | Destelbergen | 76 | 77 | 75 | 64 | 43 | 49 | 42 | 37 | 26 | 41 | 59 | 69 | 59 | 58 | |
| 43N060 | Havinnes | 48 | 67 | 60 | 52 | 39 | 50 | 44 | 34 | 30 | 34 | 52 | 59 | 50 | 44 | |
| 43N064 | Rixensart | 46 | 72 | 72 | 56 | 43 | 46 | 41 | 32 | 30 | NA | NA | 60 | 51 | 58 | |
| 43N066 | Eupen | 54 | 69 | 69 | 50 | 40 | 29 | 34 | 26 | 29 | 38 | 48 | 56 | 50 | 59 | |
| 43N070 | Mons | 50 | 64 | 63 | 49 | 42 | 43 | 41 | 32 | 30 | 29 | 46 | 55 | 41 | 51 | |
| 43N073 | Vezin | 51 | 75 | 72 | 55 | 42 | 34 | 35 | 17 | 32 | 26 | 48 | 58 | 55 | 56 | |
| 43N085 | Vielsalm | 57 | 77 | 66 | 53 | 44 | 40 | 49 | 35 | 37 | 37 | 55 | 59 | 51 | 56 | |
| 43N093 | Sinsin | 57 | 78 | 75 | 61 | 46 | 32 | 43 | 37 | 36 | 38 | 51 | 63 | 55 | 58 | |
| 43N100 | Dourbes | 50 | 76 | 73 | 56 | 42 | 30 | 43 | 33 | 33 | 31 | 47 | 56 | 51 | 56 | |
| 43N113 | Saint-Ode | 57 | 83 | 72 | 59 | 45 | 37 | 46 | 44 | 35 | 37 | 56 | 62 | 60 | 64 | |
| 43N121 | Offagne | 53 | 74 | 70 | 58 | 45 | 36 | 51 | 40 | 31 | 37 | 42 | 61 | 55 | 57 | |
| 43N132 | Habay-La-Neuve | 47 | 77 | 69 | 56 | 42 | 32 | 43 | 37 | 29 | 33 | 40 | 54 | 50 | 58 | |
| 43R221 | Herstal | 51 | 76 | 70 | 48 | 38 | 27 | 31 | 23 | 24 | 28 | 48 | 55 | 52 | 56 | |
| 43R222 | Liège (ISSeP) | 57 | 75 | 78 | 57 | 43 | 34 | 37 | 27 | 36 | 34 | 57 | 63 | 59 | 59 | |
| 43R240 | Engis | 47 | 62 | 59 | 43 | 34 | 27 | 31 | 19 | 30 | 26 | 40 | 35 | 44 | 54 | |
| 43R401 | Namur | 46 | 79 | 73 | 58 | 38 | 32 | 27 | 15 | 28 | 29 | 51 | 62 | 54 | 56 | |
| 45R502 | Lodelinsart | 34 | 71 | 59 | 46 | 40 | 30 | 27 | 18 | 23 | 22 | 28 | 42 | 38 | 47 | |
| Interpolated spatial average in : | ||||||||||||||||
| Brussels | 54 | 74 | 70 | 56 | 42 | 41 | 34 | 34 | 25 | 29 | 51 | 60 | 48 | 56 | ||
| Flanders | 64 | 77 | 73 | 58 | 46 | 51 | 44 | 38 | 30 | 40 | 56 | 66 | 55 | 62 | ||
| Wallonia | 53 | 75 | 69 | 55 | 44 | 37 | 41 | 31 | 33 | 32 | 47 | 58 | 51 | 57 | ||
| Belgium | 58 | 76 | 71 | 56 | 45 | 43 | 42 | 34 | 32 | 35 | 51 | 62 | 53 | 59 | ||
| % 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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