Luchtkwaliteitsindex, 21/01/2021 - 04/02/2021
| 21/01 | 22/01 | 23/01 | 24/01 | 25/01 | 26/01 | 27/01 | 28/01 | 29/01 | 30/01 | 31/01 | 01/02 | 02/02 | 03/02 | 04/02 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Agglomeratie | |||||||||||||||
| Brussel | 4 | 4 | 3 | 3 | 3 | 3 | 3 | 2 | 4 | 3 | 2 | 3 | 3 | 4 | 3 |
| Antwerpen | 4 | 4 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 2 | 2 | 3 | 3 | 4 | 4 |
| Gent | 4 | 4 | 3 | 3 | 3 | 3 | 3 | 3 | 4 | 3 | 2 | 3 | 3 | 4 | 3 |
| Luik | 4 | 4 | 3 | 3 | 3 | 3 | 3 | 2 | 3 | 3 | 2 | 2 | 3 | 4 | 4 |
| Charleroi | 4 | 4 | 3 | 3 | 3 | 2 | 3 | 2 | 3 | 3 | 2 | 2 | 2 | 3 | 3 |
| Regio | |||||||||||||||
| Kust | 4 | 4 | 4 | 4 | 4 | 3 | 4 | 4 | 4 | 3 | 3 | 2 | 4 | 4 | 4 |
| zuid West-Vlaanderen | 4 | 4 | 3 | 3 | 3 | 3 | 3 | 3 | 4 | 3 | 3 | 3 | 4 | 4 | 3 |
| Gentse Kanaalzone | 4 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 4 | 3 | 3 | 3 | 3 | 3 | 3 |
| zuid Oost-Vlaanderen | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| Antwerps Havengebied | 4 | 3 | 3 | 3 | 3 | 3 | 4 | 3 | 4 | 2 | 2 | 3 | 3 | 4 | 3 |
| Kempen - oost Vlaams-Brabant | 4 | 4 | 3 | 3 | 3 | 3 | 3 | 3 | 4 | 3 | 2 | 3 | 3 | 4 | 3 |
| Limburg | 4 | 4 | 3 | 3 | 3 | 3 | 3 | 3 | 4 | 3 | 2 | 2 | 4 | 4 | 4 |
| Gewest | |||||||||||||||
| Brussel | 4 | 4 | 3 | 3 | 3 | 3 | 3 | 2 | 4 | 3 | 2 | 3 | 3 | 4 | 3 |
| Vlaanderen | 4 | 4 | 3 | 3 | 3 | 3 | 3 | 3 | 4 | 3 | 3 | 3 | 3 | 3 | 3 |
| Wallonië | 4 | 4 | 3 | 3 | 3 | 3 | 3 | 3 | 4 | 3 | 2 | 2 | 3 | 4 | 4 |
| Land | |||||||||||||||
| België | 4 | 4 | 3 | 3 | 3 | 3 | 3 | 3 | 4 | 3 | 2 | 2 | 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 |