| Code | city | 08/01 | 09/01 | 10/01 | 11/01 | 12/01 | 13/01 | 14/01 | 15/01 | 16/01 | 17/01 | 18/01 | 19/01 | 20/01 | 21/01 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 41B011 | Sint-Agatha-Berchem | 57 | 56 | 46 | 28 | 9 | 62 | 34 | 12 | 24 | 16 | 23 | 27 | 18 | 24 | |
| 41MEU1 | Neder-Over-Heembeek | 56 | 56 | 45 | 15 | 13 | 60 | 30 | 3 | 32 | 11 | 19 | 17 | 10 | 15 | |
| 41N043 | Voorhaven (Haren) | 62 | 55 | 47 | 17 | 11 | 49 | 28 | 7 | 29 | 15 | 21 | 19 | 14 | 17 | |
| 41R001 | Sint-Jans-Molenbeek | 54 | 48 | 38 | 23 | 9 | 46 | 25 | 10 | 22 | 17 | 20 | 23 | 18 | 18 | |
| 41R012 | Ukkel | 65 | 58 | 44 | 29 | 8 | 54 | 33 | 10 | 27 | 16 | 22 | 21 | 19 | 21 | |
| 42N016 | Dessel | 69 | 60 | 40 | 18 | 57 | 63 | 26 | 8 | 27 | 20 | 22 | 28 | 12 | 25 | |
| 42N027 | Bree | 69 | 63 | 49 | 33 | 64 | 51 | 36 | 16 | 27 | 15 | 20 | 28 | 21 | 18 | |
| 42N035 | Aarschot | 71 | 71 | 53 | 25 | 28 | 73 | 38 | 12 | 37 | 23 | 26 | 31 | 13 | 29 | |
| 42N040 | Sint-Pieters-Leeuw | 66 | 59 | 47 | 38 | 18 | 66 | 38 | 15 | 38 | 18 | 29 | 30 | 21 | 27 | |
| 42N046 | Gellik | 70 | 63 | 61 | 48 | 39 | 55 | 45 | 23 | 28 | 17 | 23 | 29 | 27 | 13 | |
| 42N047 | Hasselt | 66 | 61 | 51 | 42 | 16 | 54 | 36 | 20 | 22 | 12 | 19 | 31 | 24 | 18 | |
| 42R801 | Borgerhout | 55 | 55 | 38 | 8 | 66 | 47 | 26 | 10 | 23 | 23 | 14 | 20 | 11 | 17 | |
| 42R811 | Schoten | 56 | 61 | 36 | 6 | 62 | 58 | 26 | 10 | 25 | 25 | 16 | 21 | 8 | 17 | |
| 42R842 | Mechelen (Hendrik Speecqvest) | 58 | 58 | 44 | 15 | 9 | 60 | 28 | 13 | 28 | 21 | 18 | 21 | 16 | 18 | |
| 44M705 | Roeselare (Haven) | 57 | 59 | 54 | 53 | 70 | 58 | 37 | 11 | 40 | 42 | 34 | 39 | 34 | 21 | |
| 44N012 | Moerkerke | 65 | 72 | 61 | 53 | 76 | 66 | 39 | 16 | 28 | 40 | 29 | 38 | 23 | 22 | |
| 44N029 | Houtem (Veurne) | 59 | 75 | 49 | 67 | 76 | 68 | 48 | 18 | 44 | 47 | 39 | 46 | 36 | 30 | |
| 44R701 | Gent (Baudelopark) | 51 | 51 | 43 | 20 | 64 | 63 | 27 | 5 | 27 | 37 | 22 | 34 | 20 | 25 | |
| 44R710 | Destelbergen | 52 | 53 | 46 | 22 | 65 | 68 | 29 | 2 | 34 | 37 | 26 | 34 | 20 | 26 | |
| 43N060 | Havinnes | 61 | 55 | 42 | 28 | 28 | 50 | 31 | 2 | 30 | 30 | 29 | 21 | 22 | 20 | |
| 43N064 | Rixensart | 70 | 61 | 53 | 31 | 18 | 66 | 40 | 13 | 34 | 15 | 22 | 23 | 21 | 24 | |
| 43N066 | Eupen | 65 | 61 | 64 | 47 | 44 | 64 | 64 | 31 | 37 | 22 | 11 | 16 | 4 | 58 | |
| 43N070 | Mons | 64 | 56 | 34 | 32 | 14 | 61 | 22 | 3 | 30 | 26 | 23 | 21 | 21 | 23 | |
| 43N073 | Vezin | 63 | 66 | 52 | 49 | 45 | 61 | 34 | 13 | 39 | 7 | 27 | 25 | 15 | 33 | |
| 43N085 | Vielsalm | 73 | 80 | 62 | 56 | 62 | 61 | 69 | 44 | 50 | 30 | 42 | 28 | 57 | 54 | |
| 43N093 | Sinsin | 66 | 71 | 65 | 59 | 54 | 59 | 52 | 28 | 44 | 26 | 30 | 32 | 20 | 31 | |
| 43N100 | Dourbes | 70 | 69 | 57 | 54 | 60 | 63 | 44 | 23 | 49 | 22 | 30 | 18 | 26 | 43 | |
| 43N113 | Saint-Ode | 85 | 88 | 66 | 63 | 71 | 66 | 71 | 61 | 65 | 33 | 37 | 29 | 29 | 63 | |
| 43N121 | Offagne | 81 | 81 | 59 | 57 | 69 | 67 | 58 | 55 | 62 | 29 | 31 | 24 | 21 | 51 | |
| 43N132 | Habay-La-Neuve | 75 | 74 | 61 | 55 | 74 | 71 | 49 | 61 | 58 | 32 | 31 | 24 | 12 | 18 | |
| 43R221 | Herstal | 67 | 52 | 51 | 45 | 30 | 38 | 31 | 16 | 27 | 2 | 10 | 11 | 5 | 33 | |
| 43R222 | Liège (ISSeP) | 64 | 57 | 60 | 55 | 39 | 42 | 36 | 18 | 37 | 13 | 19 | 18 | 15 | 42 | |
| 43R240 | Engis | 61 | 61 | 52 | 48 | 39 | 44 | 43 | 16 | 38 | 4 | 26 | 23 | 12 | 42 | |
| 43R401 | Namur | 62 | 61 | 52 | 42 | 23 | 40 | 28 | 15 | 34 | 3 | 26 | 23 | 17 | 12 | |
| 45R502 | Lodelinsart | 57 | 50 | 27 | 30 | 7 | 45 | 26 | 1 | 20 | 0 | 14 | 11 | 14 | 15 | |
| Interpolated spatial average in : | ||||||||||||||||
| Brussels | 59 | 55 | 46 | 25 | 12 | 53 | 30 | 10 | 27 | 15 | 22 | 22 | 17 | 20 | ||
| Flanders | 61 | 60 | 49 | 32 | 50 | 63 | 36 | 13 | 32 | 28 | 26 | 29 | 22 | 23 | ||
| Wallonia | 66 | 66 | 53 | 47 | 41 | 61 | 45 | 24 | 37 | 22 | 27 | 22 | 20 | 31 | ||
| Belgium | 64 | 63 | 51 | 40 | 45 | 62 | 41 | 19 | 35 | 25 | 27 | 25 | 21 | 28 | ||
| % 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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