| Code | city | 30/01 | 31/01 | 01/02 | 02/02 | 03/02 | 04/02 | 05/02 | 06/02 | 07/02 | 08/02 | 09/02 | 10/02 | 11/02 | 12/02 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 41B011 | Sint-Agatha-Berchem | 53 | 48 | 61 | 50 | 42 | 49 | 36 | 55 | 46 | 63 | 52 | 13 | NA | NA | |
| 41MEU1 | Neder-Over-Heembeek | 51 | 45 | 55 | 49 | 36 | 40 | 31 | 53 | 43 | 65 | 51 | 15 | NA | NA | |
| 41N043 | Voorhaven (Haren) | 52 | 37 | 56 | 46 | 3 | NA | NA | NA | 42 | NA | 45 | 21 | 18 | 20 | |
| 41R001 | Sint-Jans-Molenbeek | 47 | 41 | 50 | 42 | 9 | NA | NA | NA | 37 | NA | 48 | 23 | 22 | 19 | |
| 41R012 | Ukkel | 54 | 48 | 59 | 48 | 19 | NA | NA | NA | 40 | 64 | 51 | 24 | 23 | 23 | |
| 42N016 | Dessel | 63 | 46 | 73 | 65 | 42 | 45 | 38 | 70 | 54 | 50 | 43 | 30 | 46 | 27 | |
| 42N027 | Bree | 65 | 58 | 68 | 60 | 47 | 51 | 44 | 56 | 53 | 47 | 48 | 24 | 42 | 33 | |
| 42N035 | Aarschot | 64 | 51 | 65 | 59 | 45 | 49 | 44 | 67 | 51 | 71 | 54 | 23 | 38 | 29 | |
| 42N040 | Sint-Pieters-Leeuw | 71 | 61 | 64 | 59 | 49 | 45 | 42 | 53 | 47 | 65 | 55 | 29 | 31 | 33 | |
| 42N046 | Gellik | 68 | 64 | 64 | 57 | 44 | 50 | 48 | 47 | 50 | 68 | 56 | 26 | 54 | 46 | |
| 42N047 | Hasselt | 60 | 59 | 70 | 63 | 42 | 49 | 46 | 50 | 49 | 70 | 46 | 23 | 57 | 43 | |
| 42R801 | Borgerhout | 58 | 40 | 58 | 49 | 35 | 46 | 35 | 50 | 48 | 61 | 44 | 28 | 20 | 20 | |
| 42R811 | Schoten | 59 | 42 | 62 | 57 | 39 | 51 | 32 | 59 | 51 | 68 | 42 | 28 | 18 | 17 | |
| 42R842 | Mechelen (Hendrik Speecqvest) | 47 | 44 | 54 | 52 | 37 | 43 | 39 | 58 | 49 | 64 | 45 | 23 | 21 | 16 | |
| 44M705 | Roeselare (Haven) | 73 | 52 | 62 | 52 | 42 | 36 | 35 | 52 | 45 | 50 | 56 | 15 | 23 | 25 | |
| 44N012 | Moerkerke | 73 | 54 | 66 | 54 | 44 | 39 | 63 | 52 | 47 | 58 | 52 | 29 | 20 | 23 | |
| 44N029 | Houtem (Veurne) | 77 | 72 | 61 | 52 | 37 | 46 | 71 | 68 | 46 | 49 | 57 | 22 | 24 | 46 | |
| 44R701 | Gent (Baudelopark) | 69 | 45 | 63 | 51 | 43 | 37 | 38 | 57 | 44 | 59 | 58 | 17 | 24 | 24 | |
| 44R710 | Destelbergen | 72 | 49 | 67 | 56 | 49 | 42 | 40 | 64 | 50 | 63 | 59 | 24 | 28 | 17 | |
| 43N060 | Havinnes | 69 | 59 | 59 | 44 | 43 | 34 | 47 | 55 | 43 | 55 | 61 | 12 | 24 | 21 | |
| 43N064 | Rixensart | 59 | 55 | 63 | 57 | 49 | 47 | 38 | 55 | 45 | 70 | 57 | 27 | 42 | 37 | |
| 43N066 | Eupen | 69 | 61 | 71 | 65 | 46 | 54 | 51 | 41 | 55 | 72 | 51 | 40 | 52 | 57 | |
| 43N070 | Mons | 62 | 42 | 55 | 43 | 35 | 33 | 35 | 48 | 46 | 53 | 63 | 41 | 22 | 31 | |
| 43N073 | Vezin | 64 | 54 | 61 | 61 | 41 | 41 | 39 | 38 | 49 | 68 | 59 | 63 | 56 | 36 | |
| 43N085 | Vielsalm | 68 | 62 | 65 | 64 | 42 | 37 | 45 | 56 | 56 | 68 | 56 | 42 | 53 | 62 | |
| 43N093 | Sinsin | 74 | 62 | 60 | 55 | 47 | 47 | 52 | 50 | 54 | 76 | 59 | 67 | 53 | 65 | |
| 43N100 | Dourbes | 69 | 58 | 60 | 51 | 45 | 42 | 50 | 59 | 52 | 66 | 60 | 67 | 40 | 56 | |
| 43N113 | Saint-Ode | 73 | 66 | 67 | 62 | 47 | 36 | 56 | 61 | 63 | 63 | 50 | 55 | 57 | 66 | |
| 43N121 | Offagne | 68 | 60 | 65 | 58 | 42 | 37 | 50 | 61 | 61 | 64 | 62 | 58 | 48 | 68 | |
| 43N132 | Habay-La-Neuve | 65 | 58 | 66 | 51 | 39 | 33 | 45 | 58 | 55 | 44 | 61 | 55 | 49 | 61 | |
| 43R221 | Herstal | 56 | 44 | 57 | 54 | 27 | 45 | 33 | 34 | 47 | 65 | 42 | 33 | 46 | 44 | |
| 43R222 | Liège (ISSeP) | 59 | 54 | 66 | 54 | 39 | 50 | 45 | 44 | 59 | 79 | 46 | 51 | 58 | 53 | |
| 43R240 | Engis | 62 | 54 | 52 | 55 | 42 | 50 | 40 | 38 | 53 | 65 | 53 | 54 | 56 | 42 | |
| 43R401 | Namur | 61 | 56 | 54 | 53 | 36 | 41 | 38 | 38 | 45 | 68 | 58 | 62 | 56 | 37 | |
| 45R502 | Lodelinsart | 56 | 48 | 48 | 48 | 29 | 28 | 27 | 34 | 38 | 57 | 59 | 54 | 20 | 28 | |
| Interpolated spatial average in : | ||||||||||||||||
| Brussels | 51 | 45 | 55 | 49 | 42 | 42 | 37 | 51 | 45 | 63 | 49 | 26 | 23 | 23 | ||
| Flanders | 67 | 54 | 64 | 57 | 45 | 47 | 45 | 58 | 51 | 60 | 53 | 27 | 29 | 27 | ||
| Wallonia | 65 | 58 | 61 | 55 | 43 | 40 | 44 | 51 | 53 | 63 | 55 | 48 | 41 | 48 | ||
| Belgium | 66 | 56 | 62 | 56 | 44 | 43 | 44 | 54 | 52 | 62 | 54 | 39 | 36 | 39 | ||
| % 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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