Dioxins in Air - Measurement Results of 2011
| Month | Sampling Date | Concentrations | |
|---|---|---|---|
| Central/Western | Tsuen Wan | ||
| January | 07-01-2011 | 0.151 | -- |
| 25-01-2011 | -- | 0.279 | |
| February | 12-02-2011 | 0.053 | -- |
| 24-02-2011 | -- | 0.036 | |
| March | 08-03-2011 | 0.149 | -- |
| 26-03-2011 | -- | 0.140 | |
| April | 07-04-2011 | 0.030 | -- |
| 19-04-2011 | -- | 0.034 | |
| May | 07-05-2011 | 0.016 | -- |
| 25-05-2011 | -- | 0.048 | |
| June | 12-06-2011 | 0.009 | -- |
| 24-06-2011 | -- | 0.008 | |
| July | 12-07-2011 | 0.036 | -- |
| 30-07-2011 | -- | 0.009 | |
| August | 11-08-2011 | 0.009 | -- |
| 23-08-2011 | -- | 0.008 | |
| September | 10-09-2011 | 0.027 | -- |
| 28-09-2011 | -- | 0.045 | |
| October | 10-10-2011 | 0.036 | -- |
| 22-10-2011 | -- | 0.029 | |
| November | 09-11-2011 | 0.024 | -- |
| 21-11-2011 | -- | 0.065 | |
| December | 03-12-2011 | 0.042 | -- |
| 21-12-2011 | -- | 0.129 | |
| Annual Average | 0.049 | 0.069 | |
NOTE :
- Figures are 24-hour average concentrations on the day of sampling in pg I-TEQ /m3.
- The concentration of dioxins is expressed as toxic equivalent (I-TEQ) concentration of 2,3,7,8 - Tetrachlorodibenzodioxin (TCDD) based on the International Toxic Equivalent Factors (I-TEF) of the North Atlantic Treaty Organization (NATO/CCMS).
- For congener concentrations that are lower than the estimated minimum sample detectable level (EMSDL), one half of the EMSDL is used in calculating the I-TEQ concentration.