• Prahlad Kumar Arya
• Anil Kumar

The Gandak River basin in Bihar is home to millions of people who heavily depend on groundwater for various purposes. As intensive agricultural activities have expanded, urbanization has increased, and demands for domestic uses have grown, both the groundwater quality and quantity degraded rapidly. Geologically, the study area is composed of older and newer alluvium ranging in age from middle Pleistocene time to recent. The present study focuses on the assessment of groundwater quality in the parts of the Gandak River basin. A total of 25 groundwater samples were collected during the pre-monsoon season (May 2022) and post-monsoon season (November, 2021) along the Gandak river flow alignment. The samples have been analyzed for determining the physical and chemical parameters of water quality such as temperature, pH, electric conductivity (EC), Total dissolved solids (TDS) and important ions concentrations of water quality using the 23rd edition of American Public Health Association Standards. The outcome of the analysis was classified as per BIS (2012) and the WHO (2011) standards for knowing the suitability of water for drinking purposes. In most cases, groundwater samples in the study area of the Gandak River basin are found mildly alkaline, with pH ranging from 7.57 to 8.25. In the analysis, it has been found that all the groundwater samples fall under the permissible or acceptable limits set by BIS and WHO. Therefore, the hydrochemical analysis indicates that the groundwater quality in the study area is mostly suitable for drinking and domestic uses.

Hydrochemical analysis, Groundwater quality assessment, Domestic uses.

"ASSESSMENT OF THE GROUNDWATER QUALITY IN PARTS OF THE GANDAK RIVER BASIN, BIHAR", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.11, Issue 6, page no.h47-h57, June-2024, Available :http://www.jetir.org/papers/JETIR2406707.pdf

"ASSESSMENT OF THE GROUNDWATER QUALITY IN PARTS OF THE GANDAK RIVER BASIN, BIHAR", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.11, Issue 6, page no. pph47-h57, June-2024, Available at : http://www.jetir.org/papers/JETIR2406707.pdf