Luchtkwaliteitsindex, 03/10/2021 - 17/10/2021
| 03/10 | 04/10 | 05/10 | 06/10 | 07/10 | 08/10 | 09/10 | 10/10 | 11/10 | 12/10 | 13/10 | 14/10 | 15/10 | 16/10 | 17/10 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Agglomeratie | |||||||||||||||
| Brussel | NA | 3 | 3 | 3 | 4 | 3 | 3 | 4 | 3 | 3 | 3 | 3 | 4 | 4 | 4 |
| Antwerpen | 3 | 3 | 2 | 3 | 4 | 3 | 5 | 5 | 3 | 3 | 4 | 3 | 3 | 4 | 4 |
| Gent | 4 | 3 | 3 | 3 | 3 | 3 | 4 | 4 | 3 | 2 | 3 | 3 | 2 | 3 | 2 |
| Luik | 4 | 3 | 3 | 3 | 3 | 3 | 3 | 4 | 3 | 2 | 3 | 2 | 2 | 3 | 3 |
| Charleroi | 3 | 3 | 2 | 2 | 3 | 3 | 4 | 5 | 2 | 2 | 3 | 3 | 3 | 3 | 3 |
| Regio | |||||||||||||||
| Kust | 4 | 3 | 4 | 3 | 3 | 4 | 4 | 4 | 4 | 4 | 4 | 3 | 4 | 4 | 3 |
| zuid West-Vlaanderen | 1 | 2 | 2 | 2 | 4 | 4 | 5 | 5 | 4 | 3 | 4 | 3 | 4 | 4 | 4 |
| Gentse Kanaalzone | 1 | 2 | 2 | 2 | 3 | 3 | 4 | 4 | 3 | 2 | 4 | 3 | 4 | 4 | 3 |
| zuid Oost-Vlaanderen | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| Antwerps Havengebied | 10 | 3 | 3 | 3 | 3 | 3 | 5 | 5 | 4 | 3 | 4 | 3 | 3 | 3 | 3 |
| Kempen - oost Vlaams-Brabant | 3 | 4 | 3 | 3 | 3 | 3 | 4 | 5 | 2 | 2 | 2 | 2 | 3 | 4 | 3 |
| Limburg | 4 | 3 | 3 | 3 | 3 | 2 | 4 | 4 | 2 | 2 | 2 | 2 | 3 | 4 | 3 |
| Gewest | |||||||||||||||
| Brussel | NA | 3 | 3 | 3 | 4 | 3 | 3 | 4 | 3 | 3 | 3 | 3 | 4 | 4 | 4 |
| Vlaanderen | 9 | 3 | 3 | 3 | 3 | 3 | 4 | 4 | 3 | 2 | 3 | 3 | 3 | 4 | 3 |
| Wallonië | 4 | 3 | 3 | 3 | 3 | 3 | 3 | 4 | 2 | 2 | 2 | 3 | 3 | 3 | 3 |
| Land | |||||||||||||||
| België | 5 | 3 | 3 | 3 | 3 | 3 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 3 | 3 |
| 1 | uitstekend |
| 2 | zeer goed |
| 3 | goed |
| 4 | vrij goed |
| 5 | gewoon |
| 6 | middelmatig |
| 7 | ondermaats |
| 8 | slecht |
| 9 | zeer slecht |
| 10 | verschrikkelijk slecht |