\\r\\nOuargla, one of the main oases inthe Algerian Sahara. In this region, the date palm tree is the most dominant cultivated plant. Theobjective of ourresearch is to study the effects of the agricultural reuse of treated wastewater on the phoenicicultural environment in Ouargla by diagnosingof the variations on the halomorphic phenomenon in soil, groundwater and foliar of palm tree. For this purpose, nine differentstations werechosen within three are phoenicicultural perimeters irrigated by treated wastewater, three perimetersirrigated by water well and three uncultivated stations used as controlsfor soil and groundwaterquality. To achieve our objectives, we adopted the agropedological approach combined by the installation of piezometers in each station toidentifysome physico-chemical soil, groundwater and date palm leaflets parameters. Our results indicate that the soils at our study sites are naturally salty (3.81±1.2 mS/cm). At the same time, irrigation generally has positive effects on reducing soil salinity rates by leaching saltsto the groundwater table. Soil concentrations of bicarbonates and total nitrogen are low (successively 378±92mg/Land 0.56±0.01%). On the other hand, groundwater is too salty, it is excessively salty (128±58mS/cm), and charged with chloride Cl-(5141±203mg/L) and sodium Na+(2772±900mg/L).Alternatively, irrigation with treated water has positive effects on leaf nitrogen enrichment (0.26±0.1%), whereas the effect of salt stress on Na+(466±80mg/L and Cl-(342±24 mg/L) accumulation in palm leaves is not yet significant, but requires long-termcontrol due to their potentially toxic impacts on plants

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