Groundwater quality and public health risks in rural North Eastern Romania: An in-situ assessment and comparative analysis

Abstract

The current study assessed the physicochemical quality of groundwater from wells in a rural region of northeastern Romania, where local communities depend exclusively on this resource for drinking water. Eighty wells were analyzed in situ for total dissolved solids (TDS), dissolved oxygen, oxygen saturation, salinity, con-ductivity, redox potential (ORP), and pH. For comparative purposes, similar measurements were conducted on urban water supplies in the cities of Iași and Botoșani, as well as on 14 commercial bottled water brands. The findings revealed critical water quality issues in rural wells, including frequent exceedances of microbiological and chemical thresholds, particularly for nitrates and coliform bacteria. Spatial mapping showed strong variation across parameters, with elevated salinity and low oxygenation most prominent in lowland areas. Bottled water analysis showed a wide range of mineral compositions, influencing their appropriateness for daily consumption. Still waters such as Aqua Carpatica Still and Wonder Still displayed low sodium, calcium, and magnesium concentrations, making them suitable for specific dietary needs. In contrast, highly mineralized waters like Aqua Carpatica Sparkling exceeded World Health Organization (WHO) recommended limits for TDS and salinity. The study also highlighted the insufficient monitoring by local authorities and the lack of comprehensive labelling on bottled water, both of which hinder informed decision-making by consumers. The results emphasize the urgent need for standardized groundwater surveillance, public health initiatives, and improved transparency in bottled water labelling. These findings provide a foundation for future policy actions targeting safe and equitable access to drinking water in rural communities.