Luchtkwaliteitsindex, 22/03/2021 - 05/04/2021
| 22/03 | 23/03 | 24/03 | 25/03 | 26/03 | 27/03 | 28/03 | 29/03 | 30/03 | 31/03 | 01/04 | 02/04 | 03/04 | 04/04 | 05/04 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Agglomeratie | |||||||||||||||
| Brussel | 4 | 4 | 5 | 4 | 4 | 4 | 5 | 5 | 5 | 6 | 5 | 4 | 4 | 5 | 4 |
| Antwerpen | 3 | 5 | 6 | 4 | 4 | 4 | 4 | 5 | 5 | 6 | 5 | 4 | 4 | 4 | 4 |
| Gent | 3 | 5 | 5 | 3 | 4 | 4 | 5 | 5 | 5 | 6 | 7 | 4 | 5 | 4 | 4 |
| Luik | 4 | 4 | 4 | 4 | 4 | 4 | 5 | 5 | 5 | 6 | 5 | 4 | 4 | 5 | 4 |
| Charleroi | 4 | 4 | 5 | 4 | 4 | 4 | 5 | 5 | 6 | 6 | 6 | 4 | 4 | 5 | 4 |
| Regio | |||||||||||||||
| Kust | 4 | 4 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 6 | 5 | 5 | 5 | 5 | 5 |
| zuid West-Vlaanderen | 4 | 5 | 6 | 4 | 4 | 5 | 5 | 5 | 6 | 6 | 6 | 4 | 5 | 5 | 4 |
| Gentse Kanaalzone | 4 | 4 | 6 | 4 | 4 | 5 | 5 | 5 | 5 | 6 | 6 | 4 | 4 | 5 | 4 |
| zuid Oost-Vlaanderen | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| Antwerps Havengebied | 3 | 5 | 6 | 4 | 4 | 4 | 2 | 5 | 6 | 6 | 5 | 4 | 5 | 5 | 5 |
| Kempen - oost Vlaams-Brabant | 4 | 4 | 5 | 4 | 4 | 4 | 4 | 5 | 6 | 6 | 5 | 4 | 4 | 4 | 4 |
| Limburg | 4 | 4 | 5 | 4 | 5 | 4 | 5 | 5 | 5 | 6 | 5 | 4 | 5 | 5 | 4 |
| Gewest | |||||||||||||||
| Brussel | 4 | 4 | 5 | 4 | 4 | 4 | 5 | 5 | 5 | 6 | 5 | 4 | 4 | 5 | 4 |
| Vlaanderen | 4 | 5 | 6 | 4 | 4 | 4 | 5 | 5 | 5 | 6 | 6 | 4 | 5 | 4 | 4 |
| Wallonië | 4 | 4 | 5 | 4 | 4 | 4 | 5 | 5 | 6 | 6 | 5 | 4 | 5 | 5 | 4 |
| Land | |||||||||||||||
| België | 4 | 4 | 5 | 4 | 4 | 4 | 5 | 5 | 5 | 6 | 6 | 4 | 5 | 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 |