Nitrate Pollution of Groundwater Based on GIS in the City of Daloa, West-central Cote d Ivoire

Abstract

Doubt about the quality of tap water, due to its color, taste and unpleasant odors, forces a large part of the population of the city of Daloa (west-central of Cote d�Ivoire) to turn to spring and traditional wells waters whose quality is unknown. This study aims to assess the level of nitrate pollution of these shallow aquifers through 29 points including 9 spring and 20 traditional wells spread all over the city. Nitrate concentrations range from 2.5 mg/L to 301.1 mg/L, with 30% of the wells containing an excess of nitrate, beyond the WHO drinking standard (50 mg/L). The map of levels of nitrate concentrations in the city�s wells and springs shows the exposure of the populations of the old downtown neighborhoods to a high health risk due to the high pollution potential of nitrate in the water.

Mineralization of Natural Spring Water in the City of Daloa (West-Central Côte d’Ivoire)

“…Thus, due to their piezometric level close to the soil surface, these waters are exposed to anthropogenic pollution. The upward trend in nitrate concentrations in most groundwater has been noted by many authors (Graveline et al, 2009;Ahoussi et al, 2013;Eblin et al, 2019). The impact of anthropogenic activities on the quality of groundwater is a major global problem and is the subject of several studies (Bricha et al, 2007;Shahbazi & Esmaeili-sari, 2009).…”

Assessment of Vulnerability to Groundwater Pollution in the Lobo Watershed at Nibéhibé (Central-West, Côte d’Ivoire)

“…They are exploited to meet the drinking water needs of populations in large urban centers such as Daloa. Or, the water of the Lobo River, which is treated to supply the population of Daloa township in water, is very rich in organic matter, micro-pollutants and other toxic substances that are poorly controlled, giving it unpleasant organoleptic and physical aspects [6]. Face with this unpleasant situation, the population of Daloa township has turned to groundwater for their drinking water supply.…”

Surface Water Quality Assessment from a Mining Area. Case study, Groapa Burlacu lake, Targu Ocna, Romania

“…What leads to the decrease of the quality of the water both the surface and the underground are the different mining activities, industrial and municipal, the wastewater discharge, the improper storage of the different categories of waste. For a more efficient management of water quality it is necessary to monitor it regularly [1][2][3][4][5][6][7][8][9][10].…”