Heavy metals are micro likely to cause nuisance even when they are released in very small quantities (toxicity develops through bioaccumulation). Moreover, small amounts are often offset by a volume effect into account the importance of water flow. The industry is responsible for almost all releases of heavy metals in water. In effect, water rivers, streams, canals, the sea has long been "outlet" that allowed to evacuate waste. This work focuses on the analysis and evaluation of metal contamination of raw sewage drained by three main collectors Oued R'dom (Morocco) through the spatio-temporal monitoring of the levels of some metals (Pb, iron, Zn, Cd, Cu and Cr). Sampling was conducted for one year from January to December 2013. Analysis of Fe, Zn, Cd, Pb, Cr and Cu revealed the presence of metal contamination from the Fe exceeded the threshold of acceptability, other metallic trace element exist in quantity accepted, they could be classified in order of abundance in the following manner: Fe> Zn> Cd> Pb> Cu> Cr. The average concentrations of metals Oued R'dom level in water are 3.11 mg / l for Fe, 2.17 mg / l for Zn, 0.046 mg / l for Pb, 0.01 mg / l for Cr, 0.043 mg / l for Cu and 0.083 mg / l for Cd.

Our study is the follow up and spatial analysis of a number of physico-chemical parameters of water wells located at different distances from the city dump Kenitra. The absence of a source of drinking water in the region pushes the population to feed by groundwater sinks. The results show that the majority of the analysed parameters exceed drinking water standards for the discharge of three wells (P1, P2, P3) at said source of water, it is found that the pH (7.8) EC (3.3ms/cm), Ca+ Mg (7.6ms/cm), Ca2+ (186.4mg/L) Mg2 + (80.6 mg/l) , Na+ (43.7 mg/l), K+ (6.6 mg/l) NH4+ (2.7mg/l), Cl (94.5 mg/l), HCO3(287.7mg /l), CO3 (797.5 mg / l), SO4 (26.0 mg / l).
Far exceed the WHO drinking water standards and water standards and Moroccan waters twenty wells in the area Mnasra physicochemical results Ph (7.4) EC (0.8ms/cm), Ca Mg+(3.1ms/cm), Ca2+(106.8mg/l), Mg2+ (11.3 mg/l), Na+(68.5 mg / l), K+(7.4 mg/l) NH4+ (2 mg/l), Cl (94.5mg/l), HCO3(236.4 mg/l), CO3(95.8 mg/l), SO4(86.3 mg/l), Thus, the diagnosis revealed the presence of a very important pollution by leachate wells discharge is compared with the well Mnasra region. As well as the phenomenon of the increase of the water can be generated by processes of erosion, leaching and infiltration of land in the region (phosphate layers, marl and limestone intercalated) caused by the acidity due this pollution.

Environmental concerns require a certain dynamic to basic safeguarding ecosystems against any type of pollution. Studies can guide practice and the development towards better environmental management. This study has considered making a physicochemical characterization of samples collected during one year (11.01.2012 to 7.1 . 2013) at 8h, 10h, ,12h , 14h, 16h and 18h from the collection of effluent hospital revealed the following results:
The temperature varies between 15.75