| Code | city | 02/01 | 03/01 | 04/01 | 05/01 | 06/01 | 07/01 | 08/01 | 09/01 | 10/01 | 11/01 | 12/01 | 13/01 | 14/01 | 15/01 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 41B011 | Sint-Agatha-Berchem | 75 | 50 | 44 | 64 | 73 | 75 | 57 | 56 | 46 | 28 | 9 | 62 | 34 | 12 | |
| 41MEU1 | Neder-Over-Heembeek | 67 | 44 | 44 | 54 | 65 | 66 | 56 | 56 | 45 | 15 | 13 | 60 | 30 | 3 | |
| 41N043 | Voorhaven (Haren) | 73 | 43 | 41 | NA | 59 | 61 | 62 | 55 | 47 | 17 | 11 | 49 | 28 | 7 | |
| 41R001 | Sint-Jans-Molenbeek | 72 | 41 | 40 | 64 | 70 | 73 | 54 | 48 | 38 | 23 | 9 | 46 | 25 | 10 | |
| 41R012 | Ukkel | 72 | 45 | 44 | 69 | 69 | 73 | 65 | 58 | 44 | 29 | 8 | 54 | 33 | 10 | |
| 42N016 | Dessel | 73 | 56 | 46 | 64 | 72 | 71 | 69 | 60 | 40 | 18 | 57 | 63 | 26 | 8 | |
| 42N027 | Bree | 85 | 59 | 47 | 67 | 78 | 81 | 69 | 63 | 49 | 33 | 64 | 51 | 36 | 16 | |
| 42N035 | Aarschot | 83 | 58 | 43 | 70 | 77 | 80 | 71 | 71 | 53 | 25 | 28 | 73 | 38 | 12 | |
| 42N040 | Sint-Pieters-Leeuw | 81 | 52 | 48 | 67 | 75 | 77 | 66 | 59 | 47 | 38 | 18 | 66 | 38 | 15 | |
| 42N046 | Gellik | 83 | 57 | 52 | 69 | 76 | 79 | 70 | 63 | 61 | 48 | 39 | 55 | 45 | 23 | |
| 42N047 | Hasselt | 82 | 52 | 50 | 64 | 74 | 77 | 66 | 61 | 51 | 42 | 16 | 54 | 36 | 20 | |
| 42R801 | Borgerhout | 75 | 47 | 33 | 62 | 75 | 77 | 55 | 55 | 38 | 8 | 66 | 47 | 26 | 10 | |
| 42R811 | Schoten | 76 | 50 | 39 | 63 | 75 | 76 | 56 | 61 | 36 | 6 | 62 | 58 | 26 | 10 | |
| 42R842 | Mechelen (Hendrik Speecqvest) | 80 | 49 | 39 | 67 | 75 | 81 | 58 | 58 | 44 | 15 | 9 | 60 | 28 | 13 | |
| 44M705 | Roeselare (Haven) | 80 | 58 | 46 | 69 | 76 | 75 | 57 | 59 | 54 | 53 | 70 | 58 | 37 | 11 | |
| 44N012 | Moerkerke | 76 | 68 | 42 | 67 | 78 | 75 | 65 | 72 | 61 | 53 | 76 | 66 | 39 | 16 | |
| 44N029 | Houtem (Veurne) | 81 | 65 | 49 | 71 | 77 | 71 | 59 | 75 | 49 | 67 | 76 | 68 | 48 | 18 | |
| 44R701 | Gent (Baudelopark) | 77 | 56 | 43 | 67 | 77 | 77 | 51 | 51 | 43 | 20 | 64 | 63 | 27 | 5 | |
| 44R710 | Destelbergen | NA | 59 | 45 | 66 | 77 | 78 | 52 | 53 | 46 | 22 | 65 | 68 | 29 | 2 | |
| 43N060 | Havinnes | 71 | 50 | 49 | 55 | 71 | 68 | 61 | 55 | 42 | 28 | 28 | 50 | 31 | 2 | |
| 43N064 | Rixensart | 76 | 48 | 47 | 62 | 70 | 73 | 70 | 61 | 53 | 31 | 18 | 66 | 40 | 13 | |
| 43N066 | Eupen | 80 | 54 | 64 | 72 | 68 | 68 | 65 | 61 | 64 | 47 | 44 | 64 | 64 | 31 | |
| 43N070 | Mons | 66 | 43 | 49 | 60 | 68 | 67 | 64 | 56 | 34 | 32 | 14 | 61 | 22 | 3 | |
| 43N073 | Vezin | 78 | 48 | 51 | NA | 70 | 72 | 63 | 66 | 52 | 49 | 45 | 61 | 34 | 13 | |
| 43N085 | Vielsalm | 80 | 67 | 58 | 67 | 71 | 72 | 73 | 80 | 62 | 56 | 62 | 61 | 69 | 44 | |
| 43N093 | Sinsin | 89 | 59 | 56 | 67 | 77 | 74 | 66 | 71 | 65 | 59 | 54 | 59 | 52 | 28 | |
| 43N100 | Dourbes | 81 | 54 | 61 | 65 | 73 | 72 | 70 | 69 | 57 | 54 | 60 | 63 | 44 | 23 | |
| 43N113 | Saint-Ode | 87 | 67 | 57 | 70 | 76 | 77 | 85 | 88 | 66 | 63 | 71 | 66 | 71 | 61 | |
| 43N121 | Offagne | 82 | 57 | 50 | 64 | 73 | 72 | 81 | 81 | 59 | 57 | 69 | 67 | 58 | 55 | |
| 43N132 | Habay-La-Neuve | 79 | 57 | 46 | 64 | 71 | 70 | 75 | 74 | 61 | 55 | 74 | 71 | 49 | 61 | |
| 43R221 | Herstal | 79 | 49 | 54 | 61 | 71 | 74 | 67 | 52 | 51 | 45 | 30 | 38 | 31 | 16 | |
| 43R222 | Liège (ISSeP) | 79 | 55 | 63 | 71 | 78 | 79 | 64 | 57 | 60 | 55 | 39 | 42 | 36 | 18 | |
| 43R240 | Engis | 74 | 45 | 55 | 57 | 63 | 68 | 61 | 61 | 52 | 48 | 39 | 44 | 43 | 16 | |
| 43R401 | Namur | 79 | 48 | 49 | 65 | 72 | 75 | 62 | 61 | 52 | 42 | 23 | 40 | 28 | 15 | |
| 45R502 | Lodelinsart | 68 | 34 | 41 | 47 | 57 | 62 | 57 | 50 | 27 | 30 | 7 | 45 | 26 | 1 | |
| Interpolated spatial average in : | ||||||||||||||||
| Brussels | 75 | 45 | 42 | 63 | 69 | 72 | 59 | 55 | 46 | 25 | 12 | 53 | 30 | 10 | ||
| Flanders | 79 | 58 | 46 | 68 | 76 | 77 | 61 | 60 | 49 | 32 | 50 | 63 | 36 | 13 | ||
| Wallonia | 77 | 54 | 51 | 63 | 72 | 73 | 66 | 66 | 53 | 47 | 41 | 61 | 45 | 24 | ||
| Belgium | 78 | 56 | 49 | 65 | 74 | 75 | 64 | 63 | 51 | 40 | 45 | 62 | 41 | 19 | ||
| % 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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