(b)
| Mean (×10−5 μg/m³) | Median (×10−5 μg/m³) | Interquartile range (×10−5 μg/m³) | Days of operation | |||
|---|---|---|---|---|---|---|
| Crymlyn Burrows | ||||||
| 2003 | 51.5 | 4.25 | 31.7 | 33 | ||
| 2005 | 2.61 | 2.10 | 1.59 | 150 | ||
| 2006 | 29.1 | 23.6 | 17.1 | 204 | ||
| 2007 | 61.2 | 51.1 | 33.6 | 264 | ||
| 2008 | 52.7 | 42.6 | 32.6 | 227 | ||
| 2009 | 23.1 | 18.8 | 13.8 | 225 | ||
| 2010 | 13.3 | 10.6 | 7.77 | 188 | ||
|
| ||||||
| Flue 1 | Flue 2 | Either one or both flues in operation | ||||
|
| ||||||
| Marchwood | ||||||
| 2006 | 207.3 | 140.9 | 154.3 | 308 | 240 | 334 |
| 2007 | 290.6 | 204.1 | 221.5 | 325 | 327 | 344 |
| 2008 | 338.1 | 212.7 | 262.7 | 340 | 325 | 358 |
| 2009 | 96.9 | 72.5 | 72.0 | 296 | 192 | 357 |
| 2010 | 91.7 | 69.8 | 59.1 | 323 | 104 | 356 |