Dioxins in Air - Measurement Results of 2017
| Month | Sampling Date | Concentrations | |
|---|---|---|---|
| Central/Western | Tsuen Wan | ||
| January | 21-01-2017 | 0.103 | -- |
| 09-01-2017 | -- | 0.054 | |
| February | 08-02-2017 | 0.041 | -- |
| 20-02-2017 | -- | 0.032 | |
| March | 04-03-2017 | 0.055 | -- |
| 22-03-2017 | -- | 0.026 | |
| April | 21-04-2017 | 0.016 | -- |
| 09-04-2017 | -- | 0.009 | |
| May | 09-05-2017 | 0.017 | -- |
| 21-05-2017 | -- | 0.009 | |
| June | 08-06-2017 | 0.008 | -- |
| 20-06-2017 | -- | 0.009 | |
| July | 20-07-2017 | 0.012 | -- |
| 08-07-2017 | -- | 0.009 | |
| August | 07-08-2017 | 0.009 | -- |
| 25-08-2017 | -- | 0.009 | |
| September | 06-09-2017 | 0.009 | -- |
| 24-09-2017 | -- | 0.009 | |
| October | 24-10-2017 | 0.038 | -- |
| 12-10-2017 | -- | 0.030 | |
| November | 05-11-2017 | 0.047 | -- |
| 23-11-2017 | -- | 0.044 | |
| December | 05-12-2017 | 0.063 | -- |
| 17-12-2017 | -- | 0.066 | |
| Annual Average | 0.035 | 0.025 | |
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.