| Areas | Sites | Annual Mean N02 ug/m3 |
||||
2004 |
2005 |
2006 |
2007 |
2008 |
||
| Wesleyan Chapel | - |
- |
- |
24 |
24 |
|
| Arran Road | - |
- |
- |
17 |
17 |
|
| Cross Lane | - |
- |
- |
19 |
17 |
|
The above figures are bias adjusted.