Physicochemical quality of underground water from agricultural influence

Abstract

GGroundwater in rural areas is the only source of supply for consumption and various activities. It is exposed to various pollutants that arrive through the subsoil layers. The objective of this study was to evaluate the quality of water from 15 wells in the municipality of Cotaxtla, through physicochemical variables such as pH, conductivity (EC), salinity and total dissolved solids (TDS), where the results were compared with the regulations according to its use. The samples were collected according to NOM-230-SSA1-2002. The physicochemical variables were determined with the multiparametric Consort C6010. Results ranged from pH 6.71-8.04, EC 228-4500 mS/cm, salinity 0.13-2.42 mg/L, and TDS 132-2250 mg/L. In every case, water is destined for agricultural use, where 52% is used for livestock and 80% for consumption, 60% of the wells are community and supply 612 inhabitants. According to Mexican regulations, the results obtained from EC, 13% of the wells were not suitable for consumption, in relation to the TDS results, 33% were not suitable for consumption and 13% were not suitable for agricultural irrigation. The pH showed values within the norm, however, one showed a pH of 6.71 ± 0.043, while the rest were found between 7.4 ± 0.03-8.1 ± 0.19. In all values, significant differences were shown between the sites analyzed