In this work, we investigate the hydrochimy of surface water of the Senegal River (the Mauritanian delta of the city of Rosso). After several years of domestic exploitation: agricultural and industrial one, besides the climate changes in the area, it is interesting to make sure of the quality of water. With this intention, we tried to carry out a physicochemical evaluation, to have an idea on the probabilities of pollution and the effect of the seasonal variation of the climate on water of this river. For that a sampling was carried out during every season of 2015 at the five stations on the axis of the river at the city of Rosso. The followed physicochemical parameters are : T°C, pH, C.E, the total hardness (TH), Ca2+, Mg2+ , Na+, K+ , NH4+, CL-, NO2-, NO3-, HCO3-, CO2, SO4--,TA, TAC and suspended matter. These measures comprise volumetric analysis, spectroscopic, Potentiometric. Statistical exploitation of the results and their comparison with the European standards of potability of water has shown that there is a true deterioration of the quality of water of the Senegal River. The content of nitrite varies between 0.13 mg/l and 1.6 mg/l with an average about 0,55mg/l which exceeds the standard (0.1 mg/l).The content of bicarbonate varies between 18 mg/l and 61 mg/l with average value36, 14mg/L exceeds the standard (30 mg/l).The content of carbon dioxide varies between 6.94 mg/l and 28.45 mg/l with average value 17.26 mg/l exceeds the standard (10 mg/l). A quality control of water of the Senegal River must be required and updated in particular the reduction of the domestic and industrial effluent of the factories located at the shore of this river.

In order to assess the degree of pollution of wastewater from the city of M'rirt, we conducted during 2014; a study of physical and chemical characteristics of the waters of reference collector L6-Sp. it collects almost all wastewater from the city and is located right on the road to Meknes. The results showed that liquid waste is loaded into mineral matter in terms of electrical conductivity (Avg. = 3055,25?S / cm

In Morocco, like in all developing countries, sanitation and sewage treatment are one of the biggest environmental problems. The lack of public network for waste water treatment, the absence of control and of environmental sensitivity contribute to spreading diseases, degrading landscapes and contaminating surface as well as underground water. Wastewater is considered their main polluting factor.
In Morocco, the treatment of wastewater by the natural lagoon is probably the most efficient solution both in economic terms and in terms of performance. The objective of this work is to study the physical, chemical and bacteriological parameters of raw and treated water from the station.
For this, we opted carried out a series of measures: For the physicochemical parameters as temperature, pH, salinity, turbidity, the redox potential, electrical conductivity (EC), biochemical oxygen demand BOD5, chemical oxygen demand (COD), suspended solids SS, and O2 dissolved oxygen and bacteriological parameters as fecal coliforms (FC) and total coliforms (CT). Data analysis showed that the treatment efficiency of the station reached respectively 15,86%, 55,34%, 55,58% of the SS, COD and BOD5 which does not meet the discharge standards. The bacteriological analysis showed faecal pollution of human origin and performance of abatement of fecal germs can be deduced that the treatment adopted by facultative ponds far beyond the values required by Moroccan or European standards.

Environmental concern assumes some basic dynamism to safeguarding ecosystems against all types of pollution and better management of the environment.
The objective of this work is to determine the degree of pollution of wastewater Azilal, based on the results obtained by physicochemical analyzes of samples taken from a collector of the city during the period between the months spread August 2013 and May 2014.
The temperature varies between 12.9

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.

The impact of industrial effluents on environment is an obvious reality and a serious threat in the medium term for the quality of surface water and ground water as well. The impact on the water environment surrounding the paper mill (CDM) in Sidi Yahia Gharb is mainly due to the use of water in the manufacturing of pulp using the Kraft process and the discharge of waste effluents in: the Ma

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