Abstract
Water with high nitrate concentration (NO3 −) is unfit for human consumption, especially when its concentration exceeded the threshold limit (50 mg/l) recommended by the health authorities such as the World Health Organization (WHO). In Jordan, there is a great concern for determination and monitoring organic and inorganic pollutants that may reach groundwater. Nitrate is highly mobile and present in domestic, agricultural and industrial waste in Jordan, and thus this study focused initially on nitrate as both a contaminant of concern and as an indicator of potential groundwater contamination. The present study determined the extent of nitrate contamination in groundwater in the study area and examined the likely sources of NO3 −. A total of 248 groundwater samples were collected from 16 wells in different sites of Al-Hashimiya area, Zerqa Governorate, Jordan, and investigated for NO3 − concentrations. Moreover, measurements of temperature, electrical conductivity and pH were carried out in the field. Analysis was carried out according to the methods described by the American Public Health Association (APHA). Results showed that there was a dramatic increasing in NO3 − concentrations from the year 2001 to 2006 for some selected wells in the present study. NO3 − concentration in 2006 was ranged from 10 to 330 mg/l with an average of 77 mg/l. Overall, groundwater had elevated nitrate concentration with 92% of the samples containing more than 20 mg/l NO3 −, indicating the influence of human activities. This study has shown that there is a strong correlation between the nitrate concentration and the wastewater effluents as a source of pollution.
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Obeidat, M.M., Massadeh, A.M., Al-Ajlouni, A.M. et al. Analysis and evaluation of nitrate levels in groundwater at Al-Hashimiya area, Jordan. Environ Monit Assess 135, 475–486 (2007). https://doi.org/10.1007/s10661-007-9667-5
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DOI: https://doi.org/10.1007/s10661-007-9667-5