Luchtkwaliteitsindex, 28/04/2011 - 12/05/2011
| 28/04 | 29/04 | 30/04 | 01/05 | 02/05 | 03/05 | 04/05 | 05/05 | 06/05 | 07/05 | 08/05 | 09/05 | 10/05 | 11/05 | 12/05 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Agglomeratie | |||||||||||||||
| Brussel | 4 | 5 | 6 | 6 | 5 | 5 | 5 | 5 | 6 | 6 | 6 | 5 | 5 | 4 | 5 |
| Antwerpen | 4 | 5 | 6 | 6 | 5 | 5 | 5 | 5 | 6 | 6 | 6 | 4 | 5 | 4 | 5 |
| Gent | 5 | 6 | 6 | 6 | 5 | 5 | 5 | 6 | 6 | 6 | 6 | 5 | 4 | 5 | 5 |
| Luik | 4 | 5 | 5 | 5 | 5 | 4 | 5 | 6 | 7 | 7 | 7 | 5 | 6 | 5 | 5 |
| Charleroi | 5 | 6 | 6 | 6 | 5 | 4 | 5 | 6 | 7 | 6 | 6 | 4 | 6 | 4 | 4 |
| Regio | |||||||||||||||
| Kust | 5 | 6 | 6 | 5 | 5 | 5 | 5 | 6 | 7 | 6 | 5 | 5 | 5 | 4 | 5 |
| zuid West-Vlaanderen | 5 | 6 | 6 | 6 | 5 | 4 | 4 | 5 | 6 | 6 | 5 | 5 | 4 | 5 | 5 |
| Gentse Kanaalzone | 7 | 6 | NA | NA | 5 | 5 | 5 | 5 | 7 | 6 | 6 | 5 | 4 | 4 | 5 |
| zuid Oost-Vlaanderen | 4 | 6 | 6 | 6 | 5 | 5 | 5 | 6 | 7 | 6 | 6 | 5 | 5 | 5 | 5 |
| Antwerps Havengebied | 4 | 6 | 6 | 6 | 5 | 5 | 5 | 5 | 6 | 6 | 6 | 4 | 5 | 5 | 4 |
| Kempen - oost Vlaams-Brabant | 4 | 6 | 6 | 6 | 5 | 5 | 5 | 6 | 7 | 7 | 6 | 5 | 6 | 5 | 5 |
| Limburg | 5 | 6 | 6 | 6 | 5 | 4 | 5 | 6 | 7 | 7 | 7 | 5 | 7 | 6 | 5 |
| Gewest | |||||||||||||||
| Brussel | 4 | 5 | 6 | 6 | 5 | 5 | 5 | 5 | 6 | 6 | 6 | 5 | 5 | 4 | 5 |
| Vlaanderen | 5 | 5 | 6 | 6 | 5 | 5 | 5 | 6 | 6 | 7 | 6 | 4 | 5 | 5 | 5 |
| Wallonië | 4 | 6 | 6 | 6 | 5 | 5 | 5 | 6 | 7 | 7 | 6 | 5 | 5 | 5 | 5 |
| Land | |||||||||||||||
| België | 5 | 5 | 6 | 6 | 5 | 5 | 5 | 6 | 6 | 7 | 6 | 4 | 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 |