Luchtkwaliteitsindex, 31/03/2023 - 14/04/2023
| 31/03 | 01/04 | 02/04 | 03/04 | 04/04 | 05/04 | 06/04 | 07/04 | 08/04 | 09/04 | 10/04 | 11/04 | 12/04 | 13/04 | 14/04 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Agglomeratie | |||||||||||||||
| Brussel | 4 | 4 | 4 | 6 | 7 | 9 | 6 | 6 | 6 | 6 | 4 | 5 | NA | 5 | 6 |
| Antwerpen | 4 | 4 | 4 | 5 | 5 | 9 | 8 | 7 | 6 | 6 | 4 | 5 | 5 | 5 | 6 |
| Gent | 4 | 3 | 5 | 6 | 5 | 7 | 5 | 4 | 6 | 6 | 4 | 5 | 5 | 5 | 4 |
| Luik | 4 | 4 | 5 | 5 | 6 | 7 | 5 | 4 | 6 | 5 | 5 | 5 | 5 | 5 | 5 |
| Charleroi | 3 | 3 | 4 | 5 | 7 | 9 | 5 | 4 | 6 | 6 | 4 | 4 | 4 | 4 | 4 |
| Regio | |||||||||||||||
| Kust | 5 | 4 | 5 | 4 | 5 | 6 | 4 | 5 | 5 | 6 | 5 | 5 | 5 | 5 | 4 |
| zuid West-Vlaanderen | 5 | 4 | 6 | 6 | 6 | 7 | 5 | 4 | 6 | 7 | 5 | 5 | 5 | 5 | 4 |
| Gentse Kanaalzone | 4 | 4 | 5 | 5 | 5 | 7 | 6 | 4 | 6 | 7 | 4 | 5 | 5 | 5 | 5 |
| zuid Oost-Vlaanderen | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| Antwerps Havengebied | 4 | 5 | 5 | 5 | 6 | 10 | 9 | 6 | 6 | 7 | 7 | 5 | 5 | 5 | 5 |
| Kempen - oost Vlaams-Brabant | 4 | 4 | 4 | 5 | 5 | 6 | 5 | 4 | 6 | 6 | 4 | 5 | 5 | 5 | 5 |
| Limburg | 4 | 4 | 3 | 5 | 5 | 6 | 5 | 5 | 6 | 6 | 5 | 5 | 5 | 5 | 5 |
| Gewest | |||||||||||||||
| Brussel | 4 | 4 | 4 | 6 | 7 | 9 | 6 | 6 | 6 | 6 | 4 | 5 | NA | 5 | 6 |
| Vlaanderen | 4 | 4 | 4 | 4 | 5 | 7 | 5 | 4 | 6 | 6 | 4 | 5 | 5 | 5 | 5 |
| Wallonië | 4 | 4 | 4 | 4 | 4 | 5 | 4 | 4 | 6 | 5 | 4 | 5 | 5 | 5 | 5 |
| Land | |||||||||||||||
| België | 4 | 4 | 4 | 4 | 5 | 7 | 5 | 4 | 6 | 6 | 4 | 5 | 5 | 5 | 5 |
| 1 | uitstekend |
| 2 | zeer goed |
| 3 | goed |
| 4 | vrij goed |
| 5 | middelmatig |
| 6 | ondermaats |
| 7 | vrij slecht |
| 8 | slecht |
| 9 | zeer slecht |
| 10 | Uitermate slecht |