Poor waste management in the Kathmandu valley has deteriorated the water quality of surface and groundwater sources. The objective of this study was to assess the status of water quality (WQ) in drinking water sources of groundwater and municipal supply (tap water) from the Bagmati river basin in Kathmandu valley. A total of 52 water samples from deep tube-well, tube-well, dug-well, and tap water were collected and analyzed for physical, chemical, and microbiological parameters using standard methods. The results revealed that chloride, total hardness (TH), copper, nitrate, sulfate, and turbidity were within the recommendations of the National Drinking Water Quality Standard (NDWQS). Total coliform (TC) bacteria in 84.6% of the samples exceeded drinking water guidelines. Similarly, the isolates of different enteric bacteria, namely Escherichia coli (21.5%), Citrobacter spp. (20.9%), Klebsiella spp. (19.8%), Proteus spp. (13.9%), Enterobacter spp. (8.72%), Salmonella spp. (5.8%), Shigella spp. (5.2%), and Pseudomonas (4.1%) were identified in the samples collected from the respective sources. Out of the 52 water samples, 7.7% of samples had fecal contamination of somatic coliphage. The groundwater and municipal water supply in the study area are not safe for drinking purposes. Treatment of water is required before its use for household applications.

加德满都谷地的废物管理不善使地表水和地下水源的水质恶化。这项研究的目的是评估加德满都谷地巴格马蒂河流域地下水和市政供水（自来水）饮用水源中的水质状况。收集了来自深管井，管井，挖井和自来水的52个水样，并使用标准方法分析了其物理，化学和微生物参数。结果表明，氯化物，总硬度（TH），铜，硝酸盐，硫酸盐和浊度均在国家饮用水水质标准（NDWQS）的建议之内。84.6％的样本中大肠菌群（TC）细菌超过了饮用水标准。同样，不同肠细菌的分离物，即大肠杆菌（21.5％），柠檬酸杆菌属。（20.9％），克雷伯菌属。（19.8％），Proteus spp。（13.9％），肠杆菌属。（8.72％），沙门氏菌属。（5.8％），志贺氏菌属。分别从各自来源收集的样品中鉴定出（5.2％）和假单胞菌（4.1％）。在52个水样本中，有7.7％的样本被粪便中的细菌性巨噬细胞污染。研究区的地下水和市政供水不能安全饮用。在将水用于家庭用途之前，需要对其进行处理。