Luchtkwaliteitsindex, 20/04/2021 - 04/05/2021
| 20/04 | 21/04 | 22/04 | 23/04 | 24/04 | 25/04 | 26/04 | 27/04 | 28/04 | 29/04 | 30/04 | 01/05 | 02/05 | 03/05 | 04/05 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Agglomeratie | |||||||||||||||
| Brussel | 5 | 5 | 4 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 |
| Antwerpen | 6 | 5 | 4 | 6 | 5 | 5 | 5 | 5 | 5 | 5 | 4 | 5 | 5 | 5 | 5 |
| Gent | 6 | 6 | 5 | 4 | 5 | 5 | 4 | 5 | 6 | 5 | 5 | 5 | 5 | 5 | 5 |
| Luik | 5 | 5 | 4 | 5 | 5 | 5 | 5 | 5 | 6 | 5 | 5 | 5 | 5 | 5 | 5 |
| Charleroi | 6 | 5 | 4 | 5 | 5 | 5 | 5 | 5 | 6 | 5 | 5 | 5 | 5 | 5 | 5 |
| Regio | |||||||||||||||
| Kust | 4 | 5 | 5 | 4 | 5 | 5 | 5 | 4 | 4 | 6 | 5 | 5 | 5 | 5 | 5 |
| zuid West-Vlaanderen | 6 | 5 | 4 | 4 | 5 | 5 | 4 | 4 | 5 | 5 | 5 | 5 | 5 | 5 | 5 |
| Gentse Kanaalzone | 6 | 6 | 4 | 4 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 |
| zuid Oost-Vlaanderen | 5 | 5 | 4 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 |
| Antwerps Havengebied | 6 | 5 | 5 | 5 | 5 | 5 | 5 | 6 | 5 | 5 | 5 | 5 | 5 | 6 | 5 |
| Kempen - oost Vlaams-Brabant | 5 | 5 | 4 | 5 | 5 | 5 | 5 | 5 | 6 | 5 | 5 | 5 | 5 | 5 | 5 |
| Limburg | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 6 | 5 | 5 | 5 | 5 | 5 | 5 |
| Gewest | |||||||||||||||
| Brussel | 5 | 5 | 4 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 |
| Vlaanderen | 6 | 5 | 4 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 |
| Wallonië | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 6 | 5 | 5 | 5 | 5 | 5 | 5 |
| Land | |||||||||||||||
| België | 5 | 5 | 4 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 |
| 1 | uitstekend |
| 2 | zeer goed |
| 3 | goed |
| 4 | vrij goed |
| 5 | gewoon |
| 6 | middelmatig |
| 7 | ondermaats |
| 8 | slecht |
| 9 | zeer slecht |
| 10 | verschrikkelijk slecht |