| Areas | Sites | Annual Mean N02 ug/m3 |
|||
2004 |
2005 |
2006 |
2007 |
||
| Earl Marshall Youth Centre | 26 |
27 |
32 |
28 |
|
| Firth Park Road | 35 |
- |
28 |
- |
|
| Owler Lane 1 | 40 |
42 |
38 |
37 |
|
| Owler Lane 2 | 34 |
34 |
36 |
31 |
|
| Barnsley Road | 42 |
41 |
36 |
38 |
|
The above figures are bias adjusted.