| Code | city | 04/01 | 05/01 | 06/01 | 07/01 | 08/01 | 09/01 | 10/01 | 11/01 | 12/01 | 13/01 | 14/01 | 15/01 | 16/01 | 17/01 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 41B011 | Sint-Agatha-Berchem | 60 | 48.5 | 45.5 | 59.5 | 59 | 76 | 48.5 | 55.5 | 58.5 | 40 | 36.5 | 67.5 | 76 | 51.5 | |
| 41MEU1 | Neder-Over-Heembeek | 55 | 36 | 43 | 53 | 57.5 | 73.5 | 50.5 | 55 | 56.5 | 41.5 | 38.5 | 65 | 70.5 | 52 | |
| 41N043 | Voorhaven (Haren) | 49.5 | 22.5 | 31.5 | 44.5 | 49.5 | 66 | 44 | 48 | 50 | 35.5 | 30.5 | 56 | 67 | 41 | |
| 41R001 | Sint-Jans-Molenbeek | 39.5 | 26 | 38 | 48 | 54 | 71.5 | 33.5 | 47.5 | 52.5 | 35 | 30.5 | 57.5 | 63 | 38.5 | |
| 41R012 | Ukkel | 49 | 43.5 | 46 | 59.5 | 61 | 76 | 45 | 54 | 59 | 46.5 | 39 | 72 | 69.5 | 49 | |
| 42N016 | Dessel | 50 | 46 | 44.5 | 58 | 46.5 | 69.5 | 54 | 50 | 53 | 39 | 42.5 | 66 | 62.5 | 47.5 | |
| 42N027 | Bree | 60.5 | 54 | 64.5 | 67 | 54.5 | 77.5 | 50.5 | 54.5 | 61 | 48.5 | 46 | 62.5 | 74 | 41.5 | |
| 42N035 | Aarschot | 53 | 52 | 52.5 | 61 | 55 | 74.5 | 47.5 | 53 | 58.5 | 46.5 | 42 | 73 | 71.5 | 54.5 | |
| 42N040 | Sint-Pieters-Leeuw | 51 | 44.5 | 52.5 | 60 | 62 | 73.5 | 47 | 56.5 | 59.5 | 44 | 40 | 70 | 72.5 | 54 | |
| 42N046 | Gellik | 58.5 | 52.5 | 54.5 | 63 | 53.5 | 75 | 48.5 | 54.5 | 62 | 46 | 46.5 | 65 | 71.5 | 54.5 | |
| 42N047 | Hasselt | 55 | 50.5 | 52.5 | 62 | 48.5 | 32.5 | 47 | 51.5 | 60.5 | 48 | 44 | 63.5 | 72.5 | 58 | |
| 42R801 | Borgerhout | 57 | 35 | 38.5 | 53.5 | 45.5 | 68.5 | 47.5 | 48.5 | 51 | 36.5 | 33.5 | 57 | 68 | 35 | |
| 42R811 | Schoten | 63 | 40 | 39.5 | 54.5 | 49.5 | 75.5 | 48 | 51 | 53 | 37.5 | 45 | 64.5 | 75 | 43.5 | |
| 42R842 | Mechelen (Hendrik Speecqvest) | 52 | 42 | 45 | 55.5 | 52.5 | 75.5 | 44 | 54.5 | 57.5 | 39.5 | 37.5 | 63 | 72.5 | 47 | |
| 44M705 | Roeselare (Haven) | 66 | 56.5 | 51 | 54.5 | 69 | 73.5 | 59 | 56.5 | 71 | 42 | 49.5 | 61 | 76 | 54.5 | |
| 44N012 | Moerkerke | 66 | 66.5 | 62 | 56 | 55.5 | 73 | 52.5 | 57.5 | 67.5 | 41 | 53.5 | 60.5 | 71.5 | 53 | |
| 44N029 | Houtem (Veurne) | 62.5 | 68.5 | 65.5 | 59 | 71.5 | 77 | 59.5 | 59.5 | 70.5 | 47.5 | 59.5 | 61.5 | 70.5 | 48.5 | |
| 44R701 | Gent (Baudelopark) | 61.5 | 47 | 40.5 | 53 | 65 | 78 | 47.5 | 56.5 | 59.5 | 40 | 39.5 | 64.5 | 77 | 53 | |
| 44R710 | Destelbergen | 54 | NA | 44.5 | 57 | 66 | 75.5 | 45.5 | 58.5 | 60 | 41 | 40 | 66 | 76.5 | 54.5 | |
| 43N060 | Havinnes | 58.5 | 30.5 | 31.5 | 52 | 54.5 | 72.5 | 52.5 | 54 | 53.5 | 40 | 36 | 58 | 73 | 42 | |
| 43N064 | Rixensart | 61 | 56 | 52 | 64 | 62.5 | 79.5 | 51 | 59 | 62.5 | 52.5 | 44.5 | 78 | 73.5 | 62 | |
| 43N066 | Eupen | 57.5 | 59.5 | 53 | 61 | 51 | 64 | 41 | 48.5 | 55.5 | 44 | 46.5 | 59.5 | 61.5 | 65.5 | |
| 43N070 | Mons | 47.5 | 10.5 | NA | 54 | 60 | 74.5 | 47 | 55 | 55.5 | 39.5 | 38 | 64 | 64.5 | 51 | |
| 43N073 | Vezin | 57.5 | 49 | 54.5 | 63 | 62.5 | 77.5 | 47.5 | 57 | 60.5 | 52 | 49 | 66.5 | 72.5 | 67.5 | |
| 43N085 | Vielsalm | 62 | 56.5 | 58 | 60 | 47 | NA | 41 | 50 | 51.5 | 38 | 38.5 | 50.5 | 56.5 | 45.5 | |
| 43N093 | Sinsin | 67 | 52 | 59 | 68 | 68 | 82.5 | 48.5 | 58.5 | 65 | 52.5 | 53.5 | 69.5 | 74.5 | 72 | |
| 43N100 | Dourbes | 63 | 53.5 | 57 | 63.5 | 72.5 | 79 | 54.5 | 58 | 59 | 52.5 | 51 | 68.5 | 70.5 | 69.5 | |
| 43N113 | Saint-Ode | 70 | 57 | 64.5 | 67 | 67.5 | 81 | 50 | 58 | 60 | 51.5 | 52 | 66.5 | 70.5 | 69.5 | |
| 43N121 | Offagne | 51 | 40.5 | 45 | 56 | 53 | 65.5 | 36.5 | 45.5 | 47 | NA | 27 | 56 | 54 | 51.5 | |
| 43N132 | Habay-La-Neuve | 60.5 | 52 | 59 | 61.5 | 61.5 | 72 | 53 | 48.5 | 50.5 | 47 | 42.5 | 62 | 64 | 57 | |
| 43R221 | Herstal | 55.5 | 44.5 | 53.5 | 59 | 48 | 73 | 40.5 | 49.5 | 59 | 46 | 45 | 63 | 70.5 | 59.5 | |
| 43R222 | Liège (ISSeP) | 59.5 | 54.5 | 58.5 | 65 | 60 | 79 | 41.5 | 55.5 | 65 | 52.5 | 49.5 | 70 | 74 | 64.5 | |
| 43R240 | Engis | 49.5 | 51 | 50 | 60 | 51 | 68 | 38 | 49.5 | 55 | 44.5 | 43.5 | 63.5 | 68 | 61 | |
| 43R401 | Namur | 57.5 | 44 | 51.5 | 57 | 58.5 | 77 | NA | 53 | 57 | 48.5 | 47.5 | 65 | 70.5 | 55.5 | |
| 45R502 | Lodelinsart | 46 | 35.5 | 42 | 51.5 | 54 | 66.5 | 41 | 48 | 53 | 41.5 | 36 | 62.5 | 62.5 | 53.5 | |
| Interpolated spatial average in : | ||||||||||||||||
| Brussels | 48 | 36 | 42 | 55 | 58 | 74 | 41 | 52 | 56 | 43 | 36 | 66 | 70 | 46 | ||
| Flanders | 60 | 49 | 49 | 61 | 58 | 77 | 51 | 56 | 61 | 44 | 45 | 66 | 75 | 51 | ||
| Wallonia | 59 | 47 | 52 | 64 | 61 | 76 | 47 | 53 | 58 | 48 | 45 | 64 | 67 | 58 | ||
| Belgium | 59 | 48 | 51 | 62 | 60 | 77 | 49 | 55 | 59 | 46 | 45 | 65 | 71 | 55 | ||
| % 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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