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This study aims to investigate the pesticide residues and metal elements in 39 wells located in the agricultural area of the northwest of Morocco. Results showed the presence of lead, chromium, selenium, copper, manganese, iron and zinc at different levels, with negligible mercury and nickel below detection limits. However, selenium and iron values exceeded the international regulation levels in 64 % and 15.4 % of samples, respectively. Organochlorine and dichlorodiphenyltrichloroethane (DDT) pesticides are found in all water samples, where their concentrations are ranged between 2 ng L -1 and 8 ng L -1 , while organophosphorine, carbamate and other organochlorines pesticides are below detection limits. The daily intake of selenium (22.62 µg per day) was lower than that of the international standards (6 - 21 µg per day). The concentrations of DDT in studied samples are over the permissible limits of international standards for drinking water.

Groundwater Contamination by Pesticides and Metals Elements in Agricultural areas of the Northwest of Morocco and Health hazard