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Water samples collected from the five wells were highly mineralized, with electric conductivity (Figure 6) ranging from 1,930 μs/cm (P1/July 2011) to 13,900 μS/cm (P3/August 2011). A high conductivity indicates strong mineralization of water (Rodier et al. 1996). According to the Moroccan standards, groundwater is divided into five classes ranging from high class to very bad class (Table 2). The P1, P2, P4 and P5 well waters were classified in the middle class (1,300–2,700 μS/cm), taking into account that 2,500 μS/cm is the value accepted by European standards (Hassoune et al. 2006; WHO 2006; Ranjitsinh & Dipak 2014), whereas P3 was classified in the very bad class. According to local farmers of Attebane, water wells in the region are known for their high salinity. Given that the perimeter studied was only 8 km from the Atlantic coast, it appears that groundwater was contaminated by the intrusion of sea water (Hsissou et al. 2001).
Table 2

Classification of groundwater quality according to the conductivity

Quality classExcellentGoodMediumBadVery bad
Conductivity (μs/cm) <400 400–1,300 1,300–2,700 2,700–3,000 >3,000 
Quality classExcellentGoodMediumBadVery bad
Conductivity (μs/cm) <400 400–1,300 1,300–2,700 2,700–3,000 >3,000 
Figure 6

Monthly variations of electric conductivity in the water sampled in five wells (P1–P5) studied in the province of Tiznit from February 2011 to January 2012.

Figure 6

Monthly variations of electric conductivity in the water sampled in five wells (P1–P5) studied in the province of Tiznit from February 2011 to January 2012.

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