| Code | city | 27/11 | 28/11 | 29/11 | 30/11 | 01/12 | 02/12 | 03/12 | 04/12 | 05/12 | 06/12 | 07/12 | 08/12 | 09/12 | 10/12 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 41B011 | Sint-Agatha-Berchem | 48 | 44 | 38 | 15 | 27 | 24 | 40 | 42 | 29 | 35 | 47 | 41 | 78 | 79 | |
| 41MEU1 | Neder-Over-Heembeek | 45 | 43 | 37 | 24 | 26 | 26 | 33 | 40 | 28 | 33 | 42 | 38 | 71 | 74 | |
| 41N043 | Voorhaven (Haren) | 47 | 42 | 32 | 27 | 31 | 28 | 35 | 40 | 31 | 24 | 41 | 37 | 75 | 78 | |
| 41R001 | Sint-Jans-Molenbeek | 46 | 35 | 26 | 15 | 22 | 18 | 34 | 39 | 19 | 21 | 41 | 34 | 67 | 70 | |
| 41R012 | Ukkel | 52 | 45 | 46 | 22 | 27 | 25 | 40 | 45 | 29 | 25 | 46 | 47 | 74 | 76 | |
| 42N016 | Dessel | 52 | 51 | 45 | 27 | 37 | 35 | 40 | 45 | 21 | 21 | 42 | 42 | 75 | 77 | |
| 42N027 | Bree | 55 | 49 | 43 | 30 | 31 | 40 | 41 | 38 | 24 | 42 | 36 | 50 | 74 | 80 | |
| 42N035 | Aarschot | 55 | NA | NA | NA | NA | NA | NA | NA | 25 | 37 | 46 | 50 | 75 | 79 | |
| 42N040 | Sint-Pieters-Leeuw | 51 | 47 | 48 | 25 | 32 | 24 | 43 | 47 | 37 | 41 | 49 | 52 | 77 | 77 | |
| 42N046 | Gellik | 56 | 49 | 42 | 14 | 32 | 37 | NA | NA | NA | NA | NA | 46 | 75 | 80 | |
| 42N047 | Hasselt | 36 | 50 | 37 | 33 | 31 | 39 | NA | NA | NA | 32 | 40 | 48 | 74 | 79 | |
| 42N054 | Walshoutem | NA | NA | NA | NA | NA | NA | NA | NA | NA | 41 | 54 | 46 | 74 | 77 | |
| 42R801 | Borgerhout | 43 | 42 | 50 | 11 | 22 | 16 | 22 | 28 | 20 | 28 | 33 | 36 | 70 | 73 | |
| 42R811 | Schoten | 46 | 49 | 48 | 23 | 34 | 18 | 33 | 41 | 24 | 25 | NA | 40 | 70 | 75 | |
| 42R831 | Berendrecht | 42 | 48 | 51 | 25 | 39 | 15 | 33 | 40 | 25 | 32 | 42 | 34 | 72 | 76 | |
| 42R842 | Mechelen (Hendrik Speecqvest) | 50 | 40 | 40 | 2 | NA | NA | NA | NA | NA | 18 | 43 | 43 | 75 | 78 | |
| 44M705 | Roeselare (Haven) | 57 | 49 | 57 | 8 | 18 | 2 | NA | NA | NA | 42 | 42 | 58 | 81 | 79 | |
| 44N012 | Moerkerke | 54 | 53 | 63 | 13 | 30 | 29 | 43 | 46 | 56 | 59 | 48 | 41 | NA | 79 | |
| 44N029 | Houtem (Veurne) | 75 | 59 | 63 | 8 | 34 | 36 | 37 | 46 | 64 | 63 | 46 | 60 | 79 | 79 | |
| 44R701 | Gent (Baudelopark) | 50 | 45 | 48 | 15 | NA | NA | NA | NA | NA | 33 | 43 | 42 | NA | NA | |
| 44R710 | Destelbergen | 49 | 50 | 48 | 17 | 28 | 6 | NA | 42 | 30 | 39 | 45 | 41 | 79 | 78 | |
| 44R740 | Sint-Kruiswinkel | 36 | 47 | 47 | 22 | 26 | 17 | 38 | 45 | 32 | 40 | 44 | 42 | 70 | 72 | |
| 43N060 | Havinnes | 43 | 48 | 38 | 24 | 32 | 16 | 36 | 45 | 25 | 36 | 52 | 43 | 79 | 78 | |
| 43N064 | Rixensart | 48 | 50 | 45 | 27 | 33 | 29 | 41 | 43 | 36 | 30 | 48 | 43 | 76 | 77 | |
| 43N066 | Eupen | 52 | 43 | 42 | 33 | 45 | 39 | 47 | 64 | 41 | 38 | 60 | 55 | 69 | 74 | |
| 43N070 | Mons | 41 | 48 | 34 | 22 | 33 | 16 | 38 | 46 | 37 | 36 | 46 | 34 | 72 | 71 | |
| 43N073 | Vezin | 55 | 51 | 44 | 37 | 34 | 38 | 47 | 50 | 49 | 36 | 51 | 48 | 77 | 75 | |
| 43N085 | Vielsalm | 57 | 49 | 48 | 32 | 52 | 39 | 39 | 55 | 44 | 47 | 51 | 44 | 70 | 74 | |
| 43N093 | Sinsin | 54 | 47 | 47 | 36 | 42 | 40 | 48 | 47 | 49 | 44 | 48 | 46 | 79 | 81 | |
| 43N100 | Dourbes | 55 | 55 | 49 | 41 | 38 | 40 | 50 | 56 | 45 | 48 | 58 | 58 | 81 | 80 | |
| 43N113 | Saint-Ode | 65 | 53 | 49 | 43 | 53 | 44 | 46 | 52 | 53 | 56 | 56 | 58 | 80 | 81 | |
| 43N121 | Offagne | 57 | 47 | 37 | 48 | 52 | 44 | 41 | 53 | 51 | 49 | 54 | 51 | 78 | 78 | |
| 43N132 | Habay-La-Neuve | 54 | 46 | 39 | 36 | 52 | 47 | 43 | 51 | 51 | 56 | 53 | 47 | 76 | 78 | |
| 43R221 | Herstal | 49 | 37 | 34 | 30 | 25 | 32 | 41 | 46 | 38 | 30 | 49 | 41 | 69 | 75 | |
| 43R222 | Liège (ISSeP) | 52 | 37 | 38 | 24 | 28 | 34 | 46 | 49 | 46 | 37 | 52 | 51 | 72 | 74 | |
| 43R240 | Engis | 45 | 41 | 45 | 27 | 28 | 39 | 42 | 51 | 38 | 34 | 51 | 44 | 71 | 73 | |
| 43R401 | Namur | 50 | 42 | 45 | 27 | 32 | 30 | 43 | 44 | 45 | 34 | 44 | 41 | 76 | 78 | |
| 45R502 | Lodelinsart | 42 | 45 | 36 | 22 | 32 | 29 | 39 | 41 | 38 | 32 | 45 | 35 | 71 | 72 | |
| Interpolated spatial average in : | ||||||||||||||||
| Brussels | 50 | 41 | 35 | 21 | 26 | 23 | 38 | 43 | 27 | 27 | 43 | 40 | 74 | 76 | ||
| Flanders | 55 | 51 | 49 | 19 | 32 | 26 | 40 | 49 | 31 | 41 | 45 | 47 | 76 | 78 | ||
| Wallonia | 55 | 50 | 44 | 30 | 41 | 35 | 43 | 51 | 43 | 43 | 51 | 46 | 76 | 77 | ||
| Belgium | 55 | 50 | 46 | 25 | 36 | 31 | 42 | 50 | 38 | 42 | 48 | 47 | 76 | 78 | ||
| % 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% | ||
Color legend:
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