Dioxins in Air - Measurement Results of 2003
| Month | Sampling Date | Concentrations | |
|---|---|---|---|
| Central/Western | Tsuen Wan | ||
| January | 6-1-2003 | 0.123 | 0.114 |
| 18-1-2003 | 0.067 | 0.060 | |
| February | 7-2-2003 | 0.042 | 0.035 |
| 23-2-2003 | 0.140 | -- | |
| March | 1-3-2003 | 0.044 | -- |
| 26-3-2003 | 0.074 | -- | |
| April | 12-4-2003 | 0.036 | -- |
| 24-4-2003 | 0.041 | -- | |
| May | 6-5-2003 | 0.036 | -- |
| 18-5-2003 | 0.098 | -- | |
| June | 11-6-2003 | 0.036 | -- |
| 23-6-2003 | 0.036 | 0.044 | |
| July | 5-7-2003 | 0.036 | 0.037 |
| 17-7-2003 | 0.035 | 0.037 | |
| August | 10-8-2003 | 0.036 | 0.037 |
| 22-8-2003 | 0.051 | 0.047 | |
| September | 3-9-2003 | 0.036 | 0.043 |
| 15-9-2003 | 0.036 | 0.036 | |
| October | 9-10-2003 | 0.062 | 0.061 |
| 21-10-2003 | 0.064 | 0.072 | |
| November | 2-11-2003 | 0.177 | 0.218 |
| 14-11-2003 | 0.088 | 0.085 | |
| December | 8-12-2003 | 0.111 | 0.103 |
| 20-12-2003 | 0.075 |
0.109 |
|
| Annual Average | 0.066 | 0.071 | |
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.