Table 2.
Total occurrence of neonicotinoids in estuarine waters in November 2020 and August 2021 (n = 16).
| Neonicotinoid | Occurrence (%)∗ | Number of sampling site detected | Mean (ng/L) | Max∗∗ (ng/L) | Sampling location for max | Sampling time for max |
|---|---|---|---|---|---|---|
| Imidacloprid | 75.00 | 8/8 | 8.75 | 35.34 | E8 | August 2021 |
| Thiamethoxam | 62.50 | 8/8 | 7.13 | 65.14 | E8 | August 2021 |
| Dinotefuran | 25.00 | 3/8 | 1.99 | 23.12 | E8 | August 2021 |
| Thiacloprid | 18.75 | 3/8 | 1.77 | 16.66 | E8 | August 2021 |
| Clothianidin | 12.50 | 2/8 | 2.01 | 27.57 | E5 | November 2020 |
| Acetamiprid | - | - | - | - | - | - |
| Nitenpyram | - | - | - | - | - | - |
| Total concentration | 75.00 | 8/8 | 21.65 | 140.26 | E8 | August 2021 |
∗
Percentage of detected samples (>LOQ).
∗∗
Maximum concentration value.