4. Concentration of DEET in Surface Water in Individual Locations and Months.
| Bohumín - Odra (river) | Bohumín - Záblatí (pond) | Bohuslavice - Bohuslavický potok (stream) | Opava - Kateřinský potok (stream) | Ostrava - Opava (river) | Potštát - Harta (pond) | Potštát - Rybník u hřiště (pond) | |
|---|---|---|---|---|---|---|---|
| month of sampling | c (μg L–1) | c (μg L–1) | c (μg L–1) | c (μg L–1) | c (μg L–1) | c (μg L–1) | c (μg L–1) |
| 9/2023 | <LOQ | 0.005 | 0.81 | 2.56 | 0.41 | <LOQ | <LOQ |
| 10/2023 | 2.85 | <LOQ | 1.37 | 0.71 | 2.16 | 1.65 | 2.24 |
| 11/2023 | 0.70 | 1.03 | 1.92 | 0.21 | 0.67 | 0.60 | 0.58 |
| 12/2023 | 1.64 | <LOQ | 2.14 | <LOQ | <LOQ | 1.97 | 1.05 |
| 1/2024 | <LOQ | <LOQ | 0.85 | <LOQ | <LOQ | <LOQ | <LOQ |
| 2/2024 | <LOQ | <LOQ | <LOQ | <LOQ | <LOQ | 0.32 | 0.23 |
| 3/2024 | 19.50 | 6.23 | 2.55 | 4.92 | 1.60 | 1.05 | 1.33 |
| 4/2024 | 5.07 | 2.36 | 1.69 | 0.70 | 2.02 | 0.53 | 0.59 |
| 5/2024 | <LOQ | 0.11 | 0.19 | <LOQ | 0.19 | 0.14 | 0.11 |
| 6/2024 | 5.21 | <LOQ | 28.83 | <LOQ | 1.82 | 4.33 | 9.39 |
| 7/2024 | 3.50 | 1.23 | 4.79 | 0.36 | 5.39 | 1.20 | 0.71 |
| 8/2024 | 4.59 | 0.51 | 2.62 | 0.43 | 2.17 | 1.22 | 0.80 |
| 9/2024 | <LOQ | <LOQ | <LOQ | <LOQ | 32.18 | <LOQ | <LOQ |
| 10/2024 | <LOQ | <LOQ | <LOQ | 0.06 | <LOQ | 0.11 | <LOQ |