Luchtkwaliteitsindex, 31/12/2021 - 14/01/2022
| 31/12 | 01/01 | 02/01 | 03/01 | 04/01 | 05/01 | 06/01 | 07/01 | 08/01 | 09/01 | 10/01 | 11/01 | 12/01 | 13/01 | 14/01 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Agglomeratie | |||||||||||||||
| Brussel | NA | 4 | 3 | 4 | 5 | 6 | 6 | 5 | NA | 6 | 8 | 8 | 9 | 9 | 10 |
| Antwerpen | NA | 4 | 3 | 4 | 5 | 5 | 7 | 6 | 5 | 6 | 9 | 9 | 10 | 9 | 10 |
| Gent | NA | 4 | 4 | 4 | 4 | 4 | 6 | 5 | 4 | 5 | 7 | 6 | 9 | 9 | 10 |
| Luik | NA | 2 | 3 | 4 | 5 | 4 | 6 | 3 | 3 | 4 | 5 | 8 | 8 | 7 | 9 |
| Charleroi | NA | 3 | 3 | 3 | 5 | 5 | 6 | 4 | 3 | 5 | 5 | 8 | 9 | 9 | 10 |
| Regio | |||||||||||||||
| Kust | NA | 4 | 4 | 5 | 4 | 3 | 4 | 3 | 4 | 4 | 6 | 6 | 6 | 6 | 7 |
| zuid West-Vlaanderen | NA | 5 | 4 | 4 | 4 | 3 | 4 | 3 | 3 | 5 | 8 | 6 | 7 | 9 | 10 |
| Gentse Kanaalzone | NA | 5 | 4 | 4 | 3 | 3 | 5 | 4 | 4 | 4 | 7 | 6 | 8 | 9 | 9 |
| zuid Oost-Vlaanderen | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| Antwerps Havengebied | NA | 6 | 5 | 5 | 6 | 6 | 7 | 6 | 5 | 6 | 9 | 8 | 9 | 9 | 10 |
| Kempen - oost Vlaams-Brabant | NA | 3 | 3 | 4 | 4 | 3 | 4 | 3 | 3 | 4 | 5 | 5 | 6 | 8 | 9 |
| Limburg | NA | 3 | 3 | 4 | 4 | 3 | 5 | 3 | 3 | 4 | 6 | 7 | 6 | 7 | 9 |
| Gewest | |||||||||||||||
| Brussel | NA | 4 | 3 | 4 | 5 | 6 | 6 | 5 | NA | 6 | 8 | 8 | 9 | 9 | 10 |
| Vlaanderen | NA | 4 | 3 | 4 | 4 | 4 | 5 | 4 | 4 | 5 | 7 | 7 | 8 | 9 | 9 |
| Wallonië | NA | 2 | 3 | 4 | 3 | 3 | 4 | 3 | 3 | 3 | 4 | 6 | 6 | 6 | 7 |
| Land | |||||||||||||||
| België | NA | 3 | 3 | 4 | 4 | 4 | 5 | 4 | 3 | 4 | 7 | 7 | 8 | 8 | 9 |
| 1 | uitstekend |
| 2 | zeer goed |
| 3 | goed |
| 4 | vrij goed |
| 5 | middelmatig |
| 6 | ondermaats |
| 7 | vrij slecht |
| 8 | slecht |
| 9 | zeer slecht |
| 10 | Uitermate slecht |