| Code | city | 01/12 | 02/12 | 03/12 | 04/12 | 05/12 | 06/12 | 07/12 | 08/12 | 09/12 | 10/12 | 11/12 | 12/12 | 13/12 | 14/12 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 41B011 | Sint-Agatha-Berchem | 39 | 61 | 54 | 27 | 56 | 71 | 70 | 59 | 38 | 41 | 35 | 33 | 26 | 39 | |
| 41MEU1 | Neder-Over-Heembeek | 33 | 56 | 54 | 25 | 47 | 71 | 62 | 49 | 38 | 42 | 34 | 33 | 24 | 25 | |
| 41N043 | Voorhaven (Haren) | 29 | 53 | 54 | 28 | 55 | 76 | 69 | 57 | 40 | 46 | 36 | 34 | 21 | 28 | |
| 41R001 | Sint-Jans-Molenbeek | 34 | 50 | 47 | 30 | 53 | 70 | 67 | 53 | 37 | 34 | 31 | 34 | 22 | 28 | |
| 41R012 | Ukkel | 39 | 54 | 51 | 32 | 54 | 76 | 73 | 55 | 42 | 40 | 36 | 35 | 25 | 27 | |
| 42N016 | Dessel | 38 | 55 | 63 | 26 | 48 | 74 | 67 | 52 | 46 | 54 | 46 | 50 | 27 | 28 | |
| 42N027 | Bree | 39 | 59 | 60 | 34 | 53 | 79 | 76 | 48 | 40 | 49 | 42 | 35 | 26 | 38 | |
| 42N035 | Aarschot | 38 | 61 | 56 | 36 | 51 | 74 | 74 | 59 | 46 | 51 | 41 | 39 | 31 | 44 | |
| 42N040 | Sint-Pieters-Leeuw | 38 | 64 | 59 | 37 | 57 | 75 | 71 | 63 | 41 | 41 | 39 | 40 | 32 | 35 | |
| 42N046 | Gellik | 38 | 63 | 58 | NA | 57 | 78 | 74 | 51 | 46 | 41 | 34 | 23 | 23 | 41 | |
| 42N047 | Hasselt | 39 | 61 | 59 | 35 | 53 | 76 | 72 | 53 | 44 | 44 | 37 | 26 | 23 | 34 | |
| 42R801 | Borgerhout | 29 | 51 | 57 | 43 | 65 | 76 | 68 | 48 | 42 | 46 | 44 | 41 | 19 | 36 | |
| 42R811 | Schoten | 29 | 59 | 62 | 37 | 61 | 69 | 70 | 54 | 41 | 52 | 43 | 41 | 24 | 36 | |
| 42R842 | Mechelen (Hendrik Speecqvest) | 30 | 52 | 54 | 33 | 59 | 76 | 72 | 59 | 43 | 42 | 39 | 40 | 24 | 40 | |
| 44M705 | Roeselare (Haven) | 28 | 69 | 67 | 35 | 75 | 74 | 72 | 64 | 49 | 49 | 47 | 29 | 38 | 50 | |
| 44N012 | Moerkerke | 29 | 66 | 70 | 44 | 79 | 79 | 74 | 63 | 42 | 53 | 50 | 38 | 35 | 58 | |
| 44N029 | Houtem (Veurne) | 34 | 72 | 73 | 56 | 76 | 73 | 71 | 68 | 51 | 53 | 50 | 51 | 40 | 67 | |
| 44R701 | Gent (Baudelopark) | 28 | 59 | 62 | 28 | 77 | 77 | 74 | 64 | 43 | 44 | 43 | 36 | 23 | 38 | |
| 44R710 | Destelbergen | 33 | 64 | 62 | 33 | 76 | 77 | 75 | 64 | 43 | 49 | 42 | 37 | 26 | 41 | |
| 43N060 | Havinnes | 26 | 56 | 57 | 22 | 48 | 67 | 60 | 52 | 39 | 50 | 44 | 34 | 30 | 34 | |
| 43N064 | Rixensart | 38 | 59 | 53 | 32 | 46 | 72 | 72 | 56 | 43 | 46 | 41 | 32 | 30 | NA | |
| 43N066 | Eupen | 65 | 57 | 56 | 44 | 54 | 69 | 69 | 50 | 40 | 29 | 34 | 26 | 29 | 38 | |
| 43N070 | Mons | 26 | 49 | 53 | 19 | 50 | 64 | 63 | 49 | 42 | 43 | 41 | 32 | 30 | 29 | |
| 43N073 | Vezin | 44 | 60 | 49 | 41 | 51 | 75 | 72 | 55 | 42 | 34 | 35 | 17 | 32 | 26 | |
| 43N085 | Vielsalm | 29 | 52 | 55 | 49 | 57 | 77 | 66 | 53 | 44 | 40 | 49 | 35 | 37 | 37 | |
| 43N093 | Sinsin | 40 | 63 | 59 | 55 | 57 | 78 | 75 | 61 | 46 | 32 | 43 | 37 | 36 | 38 | |
| 43N100 | Dourbes | 40 | 60 | 62 | 33 | 50 | 76 | 73 | 56 | 42 | 30 | 43 | 33 | 33 | 31 | |
| 43N113 | Saint-Ode | 27 | 61 | 62 | 58 | 57 | 83 | 72 | 59 | 45 | 37 | 46 | 44 | 35 | 37 | |
| 43N121 | Offagne | 24 | 59 | 58 | 46 | 53 | 74 | 70 | 58 | 45 | 36 | 51 | 40 | 31 | 37 | |
| 43N132 | Habay-La-Neuve | 16 | 54 | 57 | 41 | 47 | 77 | 69 | 56 | 42 | 32 | 43 | 37 | 29 | 33 | |
| 43R221 | Herstal | 34 | 54 | 50 | 37 | 51 | 76 | 70 | 48 | 38 | 27 | 31 | 23 | 24 | 28 | |
| 43R222 | Liège (ISSeP) | 45 | 56 | 56 | 45 | 57 | 75 | 78 | 57 | 43 | 34 | 37 | 27 | 36 | 34 | |
| 43R240 | Engis | 33 | 48 | 45 | 46 | 47 | 62 | 59 | 43 | 34 | 27 | 31 | 19 | 30 | 26 | |
| 43R401 | Namur | 37 | 62 | 50 | 27 | 46 | 79 | 73 | 58 | 38 | 32 | 27 | 15 | 28 | 29 | |
| 45R502 | Lodelinsart | 30 | 38 | 43 | 19 | 34 | 71 | 59 | 46 | 40 | 30 | 27 | 18 | 23 | 22 | |
| Interpolated spatial average in : | ||||||||||||||||
| Brussels | 35 | 55 | 51 | 29 | 54 | 74 | 70 | 56 | 42 | 41 | 34 | 34 | 25 | 29 | ||
| Flanders | 35 | 63 | 63 | 36 | 64 | 77 | 73 | 58 | 46 | 51 | 44 | 38 | 30 | 40 | ||
| Wallonia | 33 | 56 | 57 | 38 | 53 | 75 | 69 | 55 | 44 | 37 | 41 | 31 | 33 | 32 | ||
| Belgium | 34 | 59 | 60 | 37 | 58 | 76 | 71 | 56 | 45 | 43 | 42 | 34 | 32 | 35 | ||
| % 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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