Luchtkwaliteitsindex, 20/07/2021 - 03/08/2021
| 20/07 | 21/07 | 22/07 | 23/07 | 24/07 | 25/07 | 26/07 | 27/07 | 28/07 | 29/07 | 30/07 | 31/07 | 01/08 | 02/08 | 03/08 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Agglomeratie | |||||||||||||||
| Brussel | 5 | 6 | 5 | 6 | 5 | 4 | 4 | 5 | 4 | 3 | 4 | 4 | 3 | 4 | 5 |
| Antwerpen | 4 | 5 | 5 | 5 | 4 | 3 | 4 | 4 | 3 | 3 | 3 | 4 | 3 | 4 | 4 |
| Gent | 5 | 6 | 5 | 6 | 5 | 4 | 4 | 4 | 3 | 3 | 3 | 4 | 3 | 4 | 4 |
| Luik | 5 | 6 | 6 | 6 | 4 | 3 | 4 | 4 | 3 | 3 | 4 | 4 | 4 | 4 | 4 |
| Charleroi | 5 | 6 | 6 | 7 | 5 | 4 | 4 | 4 | 3 | 2 | 3 | 3 | 3 | 4 | 4 |
| Regio | |||||||||||||||
| Kust | 5 | 6 | 5 | 4 | 5 | 4 | 5 | 4 | 4 | 3 | 4 | 4 | 3 | 4 | 5 |
| zuid West-Vlaanderen | 5 | 6 | 5 | 5 | 5 | 4 | 4 | 4 | 4 | 3 | 3 | 4 | 3 | 4 | 4 |
| Gentse Kanaalzone | 5 | 6 | 5 | 5 | 4 | 4 | 4 | 4 | 3 | 3 | 3 | 4 | 3 | 4 | 4 |
| zuid Oost-Vlaanderen | 5 | 6 | 5 | 6 | 5 | 4 | 4 | 5 | 4 | 3 | 4 | 4 | 3 | 4 | 5 |
| Antwerps Havengebied | 5 | 6 | 5 | 5 | 4 | 3 | 4 | 4 | 3 | 3 | 3 | 4 | 3 | 4 | 5 |
| Kempen - oost Vlaams-Brabant | 5 | 6 | 5 | 6 | 4 | 3 | 4 | 4 | 4 | 3 | 4 | 4 | 3 | 4 | 5 |
| Limburg | 5 | 6 | 5 | 6 | 4 | 4 | 4 | 4 | 4 | 3 | 4 | 4 | 4 | 4 | 4 |
| Gewest | |||||||||||||||
| Brussel | 5 | 6 | 5 | 6 | 5 | 4 | 4 | 5 | 4 | 3 | 4 | 4 | 3 | 4 | 5 |
| Vlaanderen | 5 | 6 | 5 | 5 | 4 | 4 | 4 | 4 | 3 | 3 | 3 | 4 | 3 | 4 | 4 |
| Wallonië | 5 | 6 | 6 | 6 | 5 | 3 | 4 | 4 | 3 | 3 | 4 | 4 | 3 | 4 | 4 |
| Land | |||||||||||||||
| België | 5 | 6 | 5 | 6 | 4 | 4 | 4 | 4 | 3 | 3 | 3 | 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 |