Luchtkwaliteitsindex, 18/10/2021 - 01/11/2021
| 18/10 | 19/10 | 20/10 | 21/10 | 22/10 | 23/10 | 24/10 | 25/10 | 26/10 | 27/10 | 28/10 | 29/10 | 30/10 | 31/10 | 01/11 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Agglomeratie | |||||||||||||||
| Brussel | 3 | 3 | 3 | 4 | 3 | 3 | 3 | 2 | 3 | 3 | 3 | 3 | 3 | 3 | 3 |
| Antwerpen | 3 | 2 | 2 | 2 | 3 | 3 | 3 | 3 | 3 | 2 | 3 | 3 | 2 | 3 | 3 |
| Gent | 3 | 2 | 2 | 3 | 3 | 3 | 3 | 3 | 3 | 2 | 3 | 3 | 3 | 3 | 4 |
| Luik | 2 | 3 | 3 | 4 | 3 | 2 | 3 | 2 | 3 | 3 | 3 | 4 | 4 | 3 | 4 |
| Charleroi | 2 | 2 | 3 | 3 | 2 | 2 | 3 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 3 |
| Regio | |||||||||||||||
| Kust | 3 | 2 | 4 | 4 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 3 | 4 | 4 | 4 |
| zuid West-Vlaanderen | 4 | 3 | 3 | 4 | 4 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 4 | 4 |
| Gentse Kanaalzone | 3 | 3 | 3 | 4 | 3 | 3 | 3 | 3 | 2 | 2 | 2 | 3 | 3 | 3 | 4 |
| zuid Oost-Vlaanderen | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| Antwerps Havengebied | 4 | 3 | 3 | 2 | 2 | 3 | 2 | 3 | 3 | 3 | 3 | 3 | 2 | 3 | 3 |
| Kempen - oost Vlaams-Brabant | 3 | 2 | 3 | 4 | 3 | 2 | 3 | 2 | 3 | 3 | 3 | 4 | 4 | 3 | 4 |
| Limburg | 3 | 3 | 3 | 4 | 4 | 3 | 3 | 2 | 3 | 3 | 3 | 4 | 4 | 3 | 4 |
| Gewest | |||||||||||||||
| Brussel | 3 | 3 | 3 | 4 | 3 | 3 | 3 | 2 | 3 | 3 | 3 | 3 | 3 | 3 | 3 |
| Vlaanderen | 3 | 2 | 3 | 4 | 3 | 3 | 3 | 3 | 3 | 3 | 2 | 3 | 3 | 3 | 4 |
| Wallonië | 3 | 3 | 3 | 4 | 3 | 2 | 3 | 2 | 3 | 3 | 2 | 4 | 4 | 3 | 4 |
| Land | |||||||||||||||
| België | 3 | 3 | 3 | 4 | 3 | 2 | 3 | 2 | 3 | 3 | 2 | 4 | 3 | 3 | 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 |