deleterious to human health along with the high pH, TDS, and TH. Enhanced rock water interaction during post- monsoon could also contribute (to a limited extent) toward the increased values in bicarbonate (Pawar 1993). The range of chlorides in all the locations under inves- tigation is 215.15 (W8) to 4,098.73 (W2) mg/L. The con- centration of chlorides in all locations except W8 exceeds the permissible level described by IS 10500-1991.
Chloride in reasonable concentration is not harmful, but it causes corrosion in concentrations above 250 mg/L, while at about 400 mg/L, it causes a salty taste in water. An excess of chloride in water is usually taken as an index of pollu- tion and considered as tracer for groundwater contamina- tion (Loizidou and Kapetanios 1993).The chloride values in the water samples maybe due to the dissolution of rocks surrounding the aquifer and probably due to the leakage of sewage and anthropogenic pollution (agricultural activi- ties).
High concentration of chloride gives salty taste to water and may result in hypertension, osteoporosis, renal stones, and asthma (McCarthy 2004). The high chloride content in groundwater is from pollution sources such as domestic effluents, fertilizers, septic tanks, and leachates (Mor et al. 2006). Agricultural fertilizers and leachate are the main sources of sulfate in groundwater. The sulfate concentration in groundwater is within BIS and WHO standards for all the collected samples. Similarly,
the nitrate concentration was also within the permissible limit (45 mg/L) in all the sampling locations except location 1 (W1). In general, the major sources for nitrate in ground- water include domestic sewage, runoff from agricultural fields, and leachate from landfill sites (Pawar and Shaikh 1995; Jawad et al. 1998; Lee et al. 2003; Jalali 2005). Higher concentration of NO3- in water causes a disease called ‘‘Methaemoglobinaemia’’ also known as ‘‘Blue-baby
Chloride in reasonable concentration is not harmful, but it causes corrosion in concentrations above 250 mg/L, while at about 400 mg/L, it causes a salty taste in water. An excess of chloride in water is usually taken as an index of pollu- tion and considered as tracer for groundwater contamina- tion (Loizidou and Kapetanios 1993).The chloride values in the water samples maybe due to the dissolution of rocks surrounding the aquifer and probably due to the leakage of sewage and anthropogenic pollution (agricultural activi- ties).
High concentration of chloride gives salty taste to water and may result in hypertension, osteoporosis, renal stones, and asthma (McCarthy 2004). The high chloride content in groundwater is from pollution sources such as domestic effluents, fertilizers, septic tanks, and leachates (Mor et al. 2006). Agricultural fertilizers and leachate are the main sources of sulfate in groundwater. The sulfate concentration in groundwater is within BIS and WHO standards for all the collected samples. Similarly,
the nitrate concentration was also within the permissible limit (45 mg/L) in all the sampling locations except location 1 (W1). In general, the major sources for nitrate in ground- water include domestic sewage, runoff from agricultural fields, and leachate from landfill sites (Pawar and Shaikh 1995; Jawad et al. 1998; Lee et al. 2003; Jalali 2005). Higher concentration of NO3- in water causes a disease called ‘‘Methaemoglobinaemia’’ also known as ‘‘Blue-baby
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