| code | city | 21/12 | 22/12 | 23/12 | 24/12 | 25/12 | 26/12 | 27/12 | 28/12 | 29/12 | 30/12 | 31/12 | 01/01 | 02/01 | 03/01 | |
| 41B011 | Sint-Agatha-Berchem | 8 | 8 | 7 | NA | NA | 13 | 10 | 9 | 7 | 8 | NA | 7 | NA | 8 | |
| 41MEU1 | Neder-Over-Heembeek | NA | 8 | 8 | NA | NA | 14 | 12 | 13 | 9 | 11 | NA | 11 | NA | 9 | |
| 41N043 | Voorhaven (Haren) | 10 | 9 | 9 | 5 | 5 | 16 | 13 | 12 | 9 | 10 | 9 | 11 | NA | 10 | |
| 41R001 | Sint-Jans-Molenbeek | 8 | 8 | 7 | NA | NA | 17 | 10 | 10 | 7 | 9 | 7 | 8 | NA | 8 | |
| 41R012 | Ukkel | 7 | 7 | 6 | NA | NA | 12 | 9 | 8 | 7 | 8 | 6 | 8 | NA | 8 | |
| 41REG1 | Brussel (Regentlaan) | 11 | 10 | 9 | 6 | 4 | 14 | 10 | 12 | 9 | 10 | 8 | NA | NA | 10 | |
| 40AL01 | Antwerpen-Linkeroever | 13 | 14 | 10 | 6 | 4 | 15 | 13 | 15 | 11 | 12 | 9 | 12 | 7 | 12 | |
| 40AL02 | Doel (Engelsesteenweg) | 13 | 15 | 11 | 8 | 6 | 15 | 15 | 16 | 11 | 13 | 9 | 12 | 8 | 13 | |
| 40AL03 | Verrebroek | 13 | 14 | 11 | 6 | 4 | 16 | 15 | 19 | 11 | 13 | 8 | 12 | 8 | 13 | |
| 40AL04 | Kallo (Liefkenshoektunnel) | 15 | 16 | 11 | 7 | 5 | 17 | 13 | 16 | 12 | 12 | 8 | 12 | 8 | 15 | |
| 40AL05 | Kallo (sluis Kallo) | 12 | 13 | 10 | 6 | 4 | 15 | 12 | 14 | 11 | 12 | 8 | 12 | 7 | 12 | |
| 40AT83 | Berendrecht | 12 | 16 | 10 | 7 | 5 | 12 | 13 | 14 | 10 | 11 | 8 | 11 | 8 | 12 | |
| 40EG05 | Evergem (Rieme) | 12 | 12 | 10 | 6 | 4 | 49 | 133 | 15 | 10 | 70 | 9 | 12 | 8 | 12 | |
| 40GK11 | Genk (Fabrylaan) | 23 | 15 | 28 | 12 | 4 | 13 | 12 | 13 | 10 | 11 | 9 | 14 | 7 | 18 | |
| 40HB23 | Hoboken | 12 | 12 | 10 | 7 | 5 | 14 | 13 | 15 | 12 | 12 | 9 | 12 | 8 | 13 | |
| 40HK07 | Hemiksem (Rode-Kruispplein) | 11 | 12 | 10 | 5 | 3 | 17 | 14 | 15 | 11 | 14 | 8 | 12 | 7 | 12 | |
| 40MN01 | Menen | 12 | 10 | 10 | 6 | 4 | 22 | 14 | 16 | 11 | 12 | 8 | 12 | 10 | 15 | |
| 40OB01 | Oostrozebeke | 13 | 12 | 10 | 7 | 5 | 23 | 16 | 17 | 15 | 14 | 11 | 14 | 10 | 21 | |
| 40OB02 | Wielsbeke | 11 | 10 | 10 | 6 | 4 | 23 | 15 | 16 | 12 | 13 | 10 | 12 | 9 | 14 | |
| 40R822 | Antwerpen (haven) | 14 | 22 | 10 | 6 | 5 | 17 | 18 | 24 | 15 | 19 | 14 | 22 | 11 | 15 | |
| 40SA04 | Hoevenen | 12 | 16 | 10 | 7 | 5 | 15 | 14 | 14 | 10 | 12 | 8 | 12 | 7 | 12 | |
| 42AL09 | Antwerpen (Van Averbekelaan) | 12 | 14 | 11 | 5 | 4 | 14 | 13 | 15 | 11 | 14 | 8 | 11 | 8 | 12 | |
| 42AL10 | Antwerpen (Blancefloerlaan) | 12 | 13 | 11 | 5 | 4 | 15 | 13 | 13 | 10 | 11 | 8 | 11 | 7 | 11 | |
| 42DU07 | Antwerpen (Deurne) | 11 | 12 | 10 | 5 | 4 | 15 | 13 | 13 | 10 | 11 | 8 | 11 | 7 | 12 | |
| 42HH08 | Houthalen-Helchteren | NA | NA | NA | NA | NA | NA | 11 | 12 | 8 | 11 | 9 | 12 | 5 | 9 | |
| 42M802 | Antwerpen (Luchtbal) | 14 | 16 | 12 | 6 | 4 | 21 | 15 | 15 | 11 | 14 | 9 | 13 | 7 | 13 | |
| 42MK02 | Antwerpen (Merksem) | 12 | 13 | 10 | 5 | 4 | 14 | 13 | 13 | 10 | 11 | 8 | 11 | 7 | 11 | |
| 42N016 | Dessel | 12 | 12 | 10 | 6 | 5 | 14 | 12 | 14 | 10 | 11 | 9 | 12 | 7 | 11 | |
| 42N035 | Aarschot | 9 | 10 | 8 | 5 | 4 | 13 | 11 | 11 | 8 | 10 | 8 | 11 | 5 | 9 | |
| 42N047 | Hasselt | 9 | 10 | 8 | 5 | 4 | 12 | 11 | 11 | 8 | 10 | 8 | 11 | 4 | 9 | |
| 42N054 | Walshoutem | 10 | 10 | 8 | 6 | 4 | 13 | 10 | 11 | 9 | 10 | 9 | 13 | 5 | 10 | |
| 42R020 | Vilvoorde | 11 | 11 | 10 | 6 | 4 | 17 | 14 | 14 | 10 | 12 | 9 | 12 | NA | NA | |
| 42R801 | Borgerhout | 12 | 13 | 10 | 5 | 4 | 15 | 14 | 13 | 10 | 12 | 9 | 12 | 7 | 12 | |
| 42R802 | Borgerhout (straatkant) | 12 | 13 | 11 | 6 | 4 | 15 | 13 | 13 | 10 | 12 | 9 | 12 | 7 | 12 | |
| 42R803 | Antwerpen (Park Spoor Noord) | 11 | 12 | 11 | 6 | 5 | 15 | 14 | 15 | 10 | 12 | 10 | 12 | 7 | 11 | |
| 42R804 | Borgerhout (Ring) | 12 | 14 | 10 | 6 | 5 | 15 | 13 | 13 | 10 | 11 | 8 | 11 | 8 | 13 | |
| 42R805 | Antwerpen (Belgiëlei) | 14 | 15 | 12 | 6 | 4 | 18 | 16 | 16 | 11 | 14 | 10 | 14 | 8 | 14 | |
| 42R811 | Schoten | 11 | 12 | 9 | 5 | 4 | 13 | 13 | 13 | 9 | 11 | 8 | 11 | 7 | 11 | |
| 42R817 | Antwerpen (Groenenborgerlaan) | 12 | 13 | 10 | 5 | 4 | 15 | 13 | 13 | 10 | 12 | 8 | 12 | 7 | 11 | |
| 42R818 | Antwerpen (Burchtse Weel) | 11 | 12 | 9 | 5 | 4 | 13 | 12 | 12 | 9 | 11 | 7 | 10 | 6 | 10 | |
| 42R823 | Beveren-Waas | 10 | 11 | 9 | 5 | 4 | 15 | 13 | 12 | 9 | 10 | 7 | 10 | 6 | 10 | |
| 42R834 | Boom | 10 | 10 | 8 | 4 | 3 | 14 | 12 | 11 | 8 | 10 | 7 | 10 | 6 | 9 | |
| 42R842 | Mechelen (Hendrik Speecqvest) | 11 | 11 | 10 | 6 | 4 | 17 | 13 | 13 | 10 | 12 | 9 | 12 | 7 | 11 | |
| 42ZD01 | Zwijndrecht (Binnenplein) | 12 | 13 | 11 | 5 | 4 | 16 | 13 | 15 | 10 | 12 | 9 | 12 | 7 | 11 | |
| 42ZD08 | Zwijndrecht (Neerstraat) | 11 | 12 | 10 | 5 | 4 | 15 | 13 | 13 | 10 | 12 | 8 | 11 | 7 | 11 | |
| 44M705 | Roeselare (Haven) | 14 | 12 | 11 | 6 | 4 | 24 | 14 | 14 | 11 | 13 | 8 | 12 | 8 | 14 | |
| 44N012 | Moerkerke | 11 | 12 | 10 | 8 | 5 | 15 | 14 | 14 | 11 | 11 | 8 | 13 | 8 | 13 | |
| 44N029 | Houtem (Veurne) | 10 | 11 | 8 | 6 | 4 | 15 | 12 | 14 | 10 | 9 | 8 | 11 | 8 | 13 | |
| 44N052 | Zwevegem | 12 | 11 | 10 | 6 | 4 | 20 | 14 | 15 | 11 | 12 | 9 | 12 | 8 | 14 | |
| 44R701 | Gent (Baudelopark) | 12 | 12 | 11 | 6 | 4 | 17 | 13 | 14 | 11 | 12 | 9 | 12 | 8 | 13 | |
| 44R702 | Gent (Gustaaf Callierlaan) | 12 | 13 | 11 | 6 | 4 | 18 | 13 | 15 | 12 | 12 | 9 | 12 | 8 | 13 | |
| 44R710 | Destelbergen | 12 | 11 | 10 | 6 | 4 | 19 | 14 | 14 | 11 | 12 | 9 | 12 | 8 | 13 | |
| 44R731 | Evergem | 14 | 11 | 11 | 6 | 4 | 19 | 17 | 14 | 11 | 13 | 9 | 12 | 8 | 13 | |
| 44R740 | Sint-Kruiswinkel | 13 | 13 | 9 | 6 | 4 | 20 | 13 | 15 | 11 | 12 | 8 | 12 | 8 | 13 | |
| 44R750 | Zelzate | 11 | 11 | 9 | 6 | 4 | 18 | 15 | 27 | 12 | 16 | 12 | 12 | 9 | 12 | |
| 44RL01 | Roeselare (Brugsesteenweg) | 11 | 11 | 10 | 6 | 4 | 21 | 14 | 13 | 11 | 12 | 8 | 12 | 8 | 13 | |
| 43H201 | Saint-Nicolas (Liège) | 3 | 2 | 2 | 1 | 0 | 8 | 4 | 3 | 1 | 3 | 3 | 4 | 0 | 2 | |
| 43M204 | Angleur | 2 | 3 | 2 | 1 | 0 | 9 | 6 | 3 | 2 | 3 | 2 | 5 | 0 | 2 | |
| 43N060 | Havinnes | 3 | 3 | 1 | 0 | 0 | 13 | 9 | 6 | 2 | 5 | 2 | 3 | 1 | 3 | |
| 43N064 | Rixensart | 5 | 3 | 4 | 2 | 0 | 20 | 8 | 6 | 4 | 6 | 3 | 6 | 1 | 4 | |
| 43N067 | Membach | 1 | 3 | 2 | 0 | 0 | 8 | 4 | 3 | 1 | 3 | 3 | 5 | 0 | 1 | |
| 43N070 | Mons | 3 | 3 | 3 | 2 | 0 | 10 | 6 | 5 | 3 | 3 | 2 | 3 | 1 | 3 | |
| 43N073 | Vezin | 2 | 2 | 2 | 1 | 0 | 9 | 4 | 3 | 2 | 3 | 2 | 4 | 0 | 1 | |
| 43N085 | Vielsalm | 1 | 1 | 1 | 1 | 2 | 2 | 3 | 2 | 1 | 3 | 3 | 3 | 0 | 1 | |
| 43N093 | Sinsin | 0 | 2 | 1 | 0 | 0 | 6 | 4 | 2 | 1 | 2 | 2 | 3 | 0 | 1 | |
| 43N100 | Dourbes | 1 | 2 | 1 | 1 | 0 | 5 | 2 | 2 | 1 | 2 | 1 | 3 | 0 | 1 | |
| 43N113 | Saint-Ode | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | |
| 43N121 | Offagne | 0 | 1 | 0 | 0 | 0 | 3 | 1 | 1 | 0 | 1 | 1 | 1 | 0 | 0 | |
| 43N132 | Habay-La-Neuve | 0 | 1 | 0 | 1 | 0 | 3 | 4 | 2 | 1 | 2 | 3 | 3 | 0 | 1 | |
| 43R202 | Liège (Av M Destenay) | NA | 4 | 5 | 2 | 0 | 11 | 9 | 8 | 3 | 6 | 5 | 7 | 0 | 3 | |
| 43R221 | Herstal | 2 | 2 | 2 | 1 | 0 | 10 | 5 | 4 | 1 | 2 | 2 | 3 | 0 | 1 | |
| 43R222 | Liège (ISSeP) | 3 | 4 | 4 | 2 | 0 | 12 | 6 | 5 | 2 | 4 | 4 | 6 | 0 | 3 | |
| 43R223 | Jemeppe-sur-Meuse | 4 | 3 | 4 | 2 | 0 | 13 | 7 | 5 | 3 | 5 | 4 | 6 | 1 | 4 | |
| 43R240 | Engis | 3 | 3 | 2 | 1 | 0 | 10 | 10 | 15 | 9 | 7 | 5 | 6 | 1 | 3 | |
| 43R401 | Namur | 2 | 2 | 2 | 1 | 0 | 6 | 5 | 2 | 1 | 2 | 1 | 2 | 0 | 1 | |
| 45R501 | Charleroi | 4 | 5 | 3 | 2 | 0 | 14 | 5 | 6 | 3 | 4 | 3 | 6 | 0 | 3 | |
| 45R502 | Lodelinsart | 2 | 2 | 2 | 2 | 0 | 12 | 4 | 4 | 2 | 3 | 2 | 3 | 0 | 3 | |
| 45R503 | Charleroi - Parc | NA | NA | 2 | 3 | 0 | 12 | 5 | 5 | 3 | 4 | 3 | 4 | 0 | NA | |
| 45R510 | Chatelineau | 2 | 3 | 2 | 2 | 0 | 13 | 5 | 4 | 2 | 3 | 2 | 3 | 0 | 2 | |
| 45R511 | Marcinelle | 4 | NA | 4 | 4 | 1 | 11 | 4 | 6 | 4 | 5 | 3 | 7 | 1 | 4 | |
| 45R512 | Marchienne-Au-Pont | 4 | 4 | 3 | 3 | 1 | 15 | 7 | 7 | 3 | 5 | 4 | 6 | 1 | 4 | |
| 48R215 | Hermalle | 1 | 1 | 0 | 1 | 0 | 7 | NA | NA | 1 | 3 | 2 | 4 | 0 | 1 | |
| 48R235 | Bierset | 1 | 2 | 2 | 1 | 0 | 7 | 6 | NA | NA | NA | NA | NA | NA | NA | |
| 48R237 | Liège (Aéroport 1) | 1 | 1 | 1 | 0 | 0 | 5 | 3 | 2 | 0 | 1 | 1 | 1 | 0 | 0 | |
| 48R515 | Charleroi (Aeroport 1) | 3 | 3 | 2 | 3 | 0 | 10 | 6 | 5 | 3 | 4 | 3 | 5 | 0 | 3 | |
| 48R516 | Charleroi (Aeroport 2) | 2 | 2 | 1 | 2 | 0 | 10 | 5 | 4 | 2 | 3 | 2 | 3 | 0 | 1 | |
| spatial average monitoring sites in : | ||||||||||||||||
| Brussels | 9 | 8 | 8 | 6 | 5 | 14 | 11 | 11 | 8 | 9 | 8 | 9 | NA | 9 | ||
| Flanders | 12 | 13 | 10 | 6 | 4 | 17 | 16 | 14 | 11 | 13 | 9 | 12 | 7 | 12 | ||
| Wallonia | 2 | 2 | 2 | 1 | NA | 9 | 5 | 4 | 2 | 3 | 3 | 4 | NA | 2 | ||
| Belgium | 8 | 9 | 7 | 4 | 3 | 14 | 12 | 11 | 7 | 10 | 6 | 9 | 5 | 9 | ||
| spatial average in : | ||||||||||||||||
| Brussels | 7 | 7 | 6 | 4 | 3 | 12 | 9 | 9 | 6 | 7 | 6 | 8 | 4 | NA | ||
| Flanders | 10 | 10 | 9 | 5 | 3 | 14 | 11 | 12 | 9 | 10 | 7 | 10 | 6 | NA | ||
| Wallonia | 2 | 2 | 2 | 2 | 1 | 6 | 3 | 3 | 2 | 3 | 2 | 3 | 1 | NA | ||
| Belgium | 5 | 5 | 5 | 3 | 2 | 10 | 7 | 7 | 5 | 6 | 4 | 6 | 3 | NA | ||
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