Luchtkwaliteitsindex, 26/06/2021 - 10/07/2021
| 26/06 | 27/06 | 28/06 | 29/06 | 30/06 | 01/07 | 02/07 | 03/07 | 04/07 | 05/07 | 06/07 | 07/07 | 08/07 | 09/07 | 10/07 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Agglomeratie | |||||||||||||||
| Brussel | 4 | 5 | 4 | 4 | 3 | 4 | 5 | 4 | 3 | 3 | 3 | 3 | 4 | 4 | 4 |
| Antwerpen | 4 | 4 | 4 | 4 | 3 | 3 | 5 | 3 | 2 | 2 | 3 | 3 | 3 | 4 | 3 |
| Gent | 4 | 4 | 3 | 4 | 3 | 4 | 5 | 4 | 2 | 3 | 4 | 3 | 3 | 4 | 3 |
| Luik | 5 | 5 | 4 | 4 | 3 | 4 | 5 | 4 | 3 | 2 | 4 | 3 | 3 | 4 | 4 |
| Charleroi | 4 | 4 | 3 | 4 | 2 | 4 | 4 | 3 | 3 | 2 | 3 | 3 | 4 | 3 | 3 |
| Regio | |||||||||||||||
| Kust | 3 | 4 | 4 | 3 | 4 | 5 | 6 | 4 | 3 | 3 | 4 | 4 | 4 | 3 | 3 |
| zuid West-Vlaanderen | 3 | 4 | 4 | 3 | 4 | 4 | 5 | 4 | 3 | 3 | 4 | 4 | 4 | 4 | 3 |
| Gentse Kanaalzone | 4 | 4 | 4 | 5 | 3 | 4 | 5 | 4 | 3 | 3 | 3 | 3 | 3 | 4 | 3 |
| zuid Oost-Vlaanderen | 4 | 5 | 4 | 4 | 3 | 4 | 5 | 4 | 3 | 3 | 4 | 3 | 4 | 4 | 3 |
| Antwerps Havengebied | 4 | 5 | 4 | 4 | 4 | 4 | 5 | 4 | 2 | 3 | 4 | 3 | 4 | 4 | 3 |
| Kempen - oost Vlaams-Brabant | 5 | 5 | 3 | 4 | 3 | 3 | 5 | 4 | 3 | 3 | 3 | 3 | 4 | 4 | 4 |
| Limburg | 6 | 5 | 4 | 5 | 4 | 4 | 6 | 4 | 3 | 3 | 4 | 3 | 4 | 4 | 4 |
| Gewest | |||||||||||||||
| Brussel | 4 | 5 | 4 | 4 | 3 | 4 | 5 | 4 | 3 | 3 | 3 | 3 | 4 | 4 | 4 |
| Vlaanderen | 4 | 4 | 3 | 4 | 3 | 4 | 5 | 4 | 3 | 3 | 3 | 3 | 4 | 4 | 3 |
| Wallonië | 4 | 4 | 4 | 4 | 3 | 4 | 5 | 4 | 3 | 2 | 3 | 3 | 3 | 4 | 4 |
| Land | |||||||||||||||
| België | 4 | 4 | 4 | 4 | 3 | 4 | 5 | 4 | 3 | 3 | 3 | 3 | 4 | 4 | 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 |