Luchtkwaliteitsindex, 04/02/2021 - 18/02/2021
| 04/02 | 05/02 | 06/02 | 07/02 | 08/02 | 09/02 | 10/02 | 11/02 | 12/02 | 13/02 | 14/02 | 15/02 | 16/02 | 17/02 | 18/02 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Agglomeratie | |||||||||||||||
| Brussel | 3 | 3 | 2 | 2 | 3 | 3 | 3 | 4 | 3 | 4 | 4 | 3 | 3 | 3 | 3 |
| Antwerpen | 4 | 4 | 3 | 3 | 3 | 3 | 3 | 4 | 3 | 3 | 3 | 3 | 4 | 3 | 3 |
| Gent | 3 | 3 | 3 | 3 | 3 | 3 | 4 | 4 | 4 | 4 | 4 | 4 | 3 | 4 | 4 |
| Luik | 4 | 3 | 2 | 2 | 3 | 3 | 3 | 4 | NA | 4 | 4 | 4 | 3 | 4 | 4 |
| Charleroi | 3 | 3 | 2 | 3 | 4 | 3 | 3 | 4 | NA | 4 | 4 | 3 | 3 | 3 | 3 |
| Regio | |||||||||||||||
| Kust | 4 | 3 | 3 | 3 | 3 | 4 | 3 | 3 | 4 | 4 | 3 | 3 | 4 | 4 | 4 |
| zuid West-Vlaanderen | 3 | 4 | 3 | 3 | 3 | 3 | 4 | 4 | 3 | 4 | 4 | 3 | 3 | 4 | 4 |
| Gentse Kanaalzone | 3 | 3 | 4 | 3 | 4 | 4 | 3 | 4 | 4 | 4 | 4 | 4 | 3 | 4 | 4 |
| zuid Oost-Vlaanderen | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| Antwerps Havengebied | 3 | 4 | 3 | 3 | 4 | 4 | 3 | 4 | 4 | 4 | 4 | 3 | 3 | 3 | 3 |
| Kempen - oost Vlaams-Brabant | 3 | 3 | 3 | 3 | 3 | 4 | 4 | 3 | 4 | 4 | 4 | 4 | 3 | 4 | 4 |
| Limburg | 4 | 2 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 4 | 4 | 3 | 3 | 4 | 4 |
| Gewest | |||||||||||||||
| Brussel | 3 | 3 | 2 | 2 | 3 | 3 | 3 | 4 | 3 | 4 | 4 | 3 | 3 | 3 | 3 |
| Vlaanderen | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 4 | 4 | 3 | 3 | 4 | 4 |
| Wallonië | 4 | 2 | 2 | 2 | 3 | 3 | 3 | 3 | NA | 4 | 4 | 4 | 3 | 4 | 4 |
| Land | |||||||||||||||
| België | 3 | 2 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 4 | 4 | 4 | 3 | 4 | 4 |
| 1 | uitstekend |
| 2 | zeer goed |
| 3 | goed |
| 4 | vrij goed |
| 5 | gewoon |
| 6 | middelmatig |
| 7 | ondermaats |
| 8 | slecht |
| 9 | zeer slecht |
| 10 | verschrikkelijk slecht |