| Code | city | 30/09 | 01/10 | 02/10 | 03/10 | 04/10 | 05/10 | 06/10 | 07/10 | 08/10 | 09/10 | 10/10 | 11/10 | 12/10 | 13/10 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 41B011 | Sint-Agatha-Berchem | 58 | 68 | 58 | 67 | 63 | 80 | NA | 67 | 67 | 58 | 63 | 75 | 40 | 58 | |
| 41MEU1 | Neder-Over-Heembeek | 52 | 62 | 60 | 68 | 61 | 80 | 54 | 68 | 67 | 60 | 68 | 69 | 33 | 55 | |
| 41N043 | Voorhaven (Haren) | 55 | 62 | 56 | 67 | 62 | 72 | 49 | 60 | 61 | 58 | 64 | 69 | 36 | 59 | |
| 41R001 | Sint-Jans-Molenbeek | 55 | 59 | 51 | 59 | 58 | 70 | 49 | 62 | 66 | 59 | 56 | 72 | 34 | 52 | |
| 41R012 | Ukkel | 56 | 64 | 64 | 68 | 64 | 73 | 48 | 61 | 56 | 53 | 65 | 66 | 34 | 57 | |
| 42N016 | Dessel | 56 | 58 | 58 | 76 | 74 | 81 | 64 | 57 | NA | NA | NA | NA | NA | NA | |
| 42N027 | Bree | 57 | 58 | 45 | 66 | 63 | 73 | 51 | 66 | 70 | 68 | 71 | 77 | 44 | 60 | |
| 42N035 | Aarschot | 61 | 61 | 49 | 71 | 66 | 81 | 56 | 53 | NA | NA | NA | 68 | NA | NA | |
| 42N040 | Sint-Pieters-Leeuw | 58 | 70 | 67 | 65 | 67 | 82 | 52 | 67 | 69 | 59 | 65 | 73 | 38 | 60 | |
| 42N046 | Gellik | 61 | 61 | 61 | 68 | 68 | 75 | 60 | 72 | 72 | 77 | 72 | 77 | 48 | 63 | |
| 42N047 | Hasselt | 62 | 62 | 49 | 66 | 65 | 76 | 58 | 69 | 71 | 72 | 64 | 77 | 46 | 63 | |
| 42R801 | Borgerhout | 53 | 53 | 52 | 67 | 60 | 64 | 48 | 63 | 62 | 58 | 70 | 64 | 47 | 62 | |
| 42R811 | Schoten | 54 | 54 | 48 | 69 | 68 | 82 | 56 | 69 | 67 | 60 | 75 | 58 | 36 | 60 | |
| 42R842 | Mechelen (Hendrik Speecqvest) | 57 | 57 | 52 | 58 | 58 | 72 | 55 | 64 | 66 | 50 | 57 | 64 | 42 | 57 | |
| 44M705 | Roeselare (Haven) | 62 | 67 | 60 | 81 | 66 | 62 | NA | NA | NA | NA | NA | 73 | 52 | 67 | |
| 44N012 | Moerkerke | 58 | 59 | 58 | 78 | 77 | 77 | 62 | 64 | NA | NA | NA | NA | NA | NA | |
| 44N029 | Houtem (Veurne) | 59 | 63 | 65 | 75 | 69 | 72 | 50 | 70 | 67 | 78 | 80 | 76 | 65 | 67 | |
| 44R701 | Gent (Baudelopark) | 58 | 58 | 57 | 74 | 72 | 76 | 62 | 64 | NA | NA | NA | 70 | 46 | 63 | |
| 44R710 | Destelbergen | 56 | 58 | 53 | 72 | 69 | 71 | 60 | 60 | NA | NA | NA | 70 | 46 | 64 | |
| 43N060 | Havinnes | 54 | 71 | 76 | 71 | 72 | 70 | 45 | 64 | 54 | 51 | 64 | 69 | 54 | 55 | |
| 43N064 | Rixensart | 56 | 74 | 75 | 71 | 67 | 80 | 48 | 59 | 65 | 67 | 64 | 79 | 36 | 57 | |
| 43N066 | Eupen | 57 | 62 | 74 | 54 | 52 | 77 | 54 | 74 | 62 | 56 | 71 | 64 | 49 | 59 | |
| 43N070 | Mons | 52 | 59 | 73 | 68 | 76 | 71 | 37 | 49 | 58 | 55 | 56 | 58 | 25 | 42 | |
| 43N073 | Vezin | 60 | 64 | 76 | 58 | 60 | 80 | 45 | 59 | 61 | 78 | 59 | 74 | 42 | 55 | |
| 43N085 | Vielsalm | 52 | 53 | 72 | 62 | 65 | 77 | 53 | 71 | 60 | 57 | 80 | 65 | 44 | 55 | |
| 43N093 | Sinsin | 61 | 70 | 84 | 49 | 50 | 77 | 47 | 73 | 63 | 83 | 86 | 79 | 47 | 65 | |
| 43N100 | Dourbes | 59 | 70 | 76 | 61 | 71 | 74 | 49 | 64 | 67 | 82 | 65 | 74 | 41 | 60 | |
| 43N113 | Saint-Ode | 63 | 64 | 81 | 66 | 58 | 75 | 52 | 70 | 62 | 66 | 88 | 74 | 49 | 64 | |
| 43N121 | Offagne | 60 | 78 | 77 | 70 | 55 | 73 | 42 | 67 | 59 | 77 | 84 | 73 | 42 | 60 | |
| 43N132 | Habay-La-Neuve | 59 | 64 | 82 | 67 | 60 | 75 | 39 | 60 | 57 | 56 | 82 | 73 | 40 | 62 | |
| 43R221 | Herstal | 58 | 61 | 71 | 47 | 53 | 74 | 51 | 67 | 59 | 60 | 68 | 68 | 41 | 57 | |
| 43R222 | Liège (ISSeP) | 60 | 63 | 69 | 49 | 56 | 80 | 51 | 65 | 64 | 64 | 70 | 73 | 45 | 59 | |
| 43R240 | Engis | 52 | 63 | 65 | 51 | 53 | 75 | 49 | 65 | 54 | 62 | 61 | 67 | 33 | 57 | |
| 43R401 | Namur | 61 | 68 | 75 | 50 | 62 | 74 | 47 | 66 | 61 | 79 | 62 | 73 | 44 | 59 | |
| 45R502 | Lodelinsart | 49 | 52 | 75 | 55 | 60 | 77 | 42 | 56 | 59 | 67 | 52 | 66 | 33 | 41 | |
| Interpolated spatial average in : | ||||||||||||||||
| Brussels | 56 | 62 | 58 | 65 | 63 | 74 | 49 | 62 | 65 | 59 | 61 | 70 | 36 | 56 | ||
| Flanders | 60 | 66 | 55 | 75 | 70 | 77 | 56 | 70 | 69 | 58 | 71 | 74 | 47 | 63 | ||
| Wallonia | 59 | 65 | 75 | 63 | 62 | 75 | 46 | 66 | 62 | 63 | 69 | 71 | 41 | 57 | ||
| Belgium | 59 | 65 | 66 | 68 | 66 | 76 | 51 | 68 | 65 | 61 | 70 | 72 | 44 | 60 | ||
| % 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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