Luchtkwaliteitsindex, 13/04/2011 - 27/04/2011
| 13/04 | 14/04 | 15/04 | 16/04 | 17/04 | 18/04 | 19/04 | 20/04 | 21/04 | 22/04 | 23/04 | 24/04 | 25/04 | 26/04 | 27/04 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Agglomeratie | |||||||||||||||
| Brussel | 4 | 5 | 6 | 5 | 6 | 6 | 6 | 7 | 6 | 7 | 7 | 7 | 7 | 6 | 5 |
| Antwerpen | 5 | 5 | 5 | 6 | 6 | 6 | 6 | 7 | 7 | 7 | 7 | 8 | 7 | 6 | 5 |
| Gent | 4 | 4 | 6 | 6 | 6 | 6 | 7 | 7 | 7 | 8 | 7 | 8 | 7 | 6 | 5 |
| Luik | 4 | 6 | 5 | 5 | 5 | 6 | 7 | 7 | 7 | 7 | 6 | 8 | 7 | 6 | 5 |
| Charleroi | 4 | 5 | 6 | 5 | 6 | 6 | 7 | 7 | 7 | 7 | 7 | 8 | 7 | 7 | 5 |
| Regio | |||||||||||||||
| Kust | 4 | 4 | 7 | 7 | 5 | 6 | 6 | 7 | 7 | 7 | 7 | 7 | 7 | 6 | 5 |
| zuid West-Vlaanderen | 4 | 4 | 7 | 7 | 6 | 6 | 6 | 7 | 7 | 5 | 6 | 6 | 7 | 6 | 6 |
| Gentse Kanaalzone | 4 | 4 | 6 | 6 | 6 | 6 | 6 | 7 | 7 | 8 | 7 | 7 | 6 | 7 | 6 |
| zuid Oost-Vlaanderen | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| Antwerps Havengebied | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| Kempen - oost Vlaams-Brabant | 5 | 5 | 5 | 5 | 6 | 6 | 7 | 8 | 7 | 7 | 7 | 8 | 7 | 7 | 6 |
| Limburg | 4 | 4 | 5 | 5 | 5 | 6 | 7 | 7 | 7 | 7 | 7 | 8 | 7 | 7 | 6 |
| Gewest | |||||||||||||||
| Brussel | 4 | 5 | 6 | 5 | 6 | 6 | 6 | 7 | 6 | 7 | 7 | 7 | 7 | 6 | 5 |
| Vlaanderen | 4 | 4 | 6 | 6 | 6 | 6 | 6 | 7 | 7 | 7 | 7 | 7 | 7 | 6 | 5 |
| Wallonië | 5 | 5 | 5 | 5 | 5 | 6 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 6 | 5 |
| Land | |||||||||||||||
| België | 4 | 5 | 5 | 5 | 6 | 6 | 6 | 7 | 7 | 7 | 7 | 7 | 7 | 6 | 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 |