Heavy metals (mg/L) | Seasons | USEPA (2000)a | Law 48/1982b | FAO (2017)c | |||
---|---|---|---|---|---|---|---|
Autumn | Winter | Spring | Summer | ||||
Hg | 0.196 | 2.56 | 5.35 | 0.28 | Â | 0.001 | Â |
Cd | N. D | 0.11 | N. D | 0.17 | 0.005 | 0.01 | 0.01 |
Fe | 10.456 | 13.35 | 6.57 | 9.09 | 0.01 | < 1 | 5 |
Pb | 0.66 | N. D | N. D | 1.12 | 0.02 | 0.05 | 5 |
Zn | 4.797 | 5.759 | 9.29 | 7.40 | 0.005 | < 1 | 2 |
As | 0.966 | N. D | 0.216 | N. D | 0.05 | - | - |
Cu | N. D | 1.57 | 3.32 | 0.194 | 0.03 | 1 | 0.2 |