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