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River Confluence Tainted: Arsenic Poses Health Risks
9 Mar
Summary
- Arsenic levels exceeded WHO limits, posing non-carcinogenic health risks.
- Children face higher neurological, reproductive, and developmental risks.
- Contaminants stem from upstream loading and human activities.
Scientific assessments conducted over the past year at the Betwa-Yamuna river confluence in Hamirpur district have uncovered elevated concentrations of arsenic and other heavy metals. These findings, originating from the Birbal Sahni Institute of Palaeosciences in Lucknow, indicate potential health risks, particularly for children.
The study, which spanned from June 2023 to May 2024, analyzed monthly water samples. Results showed arsenic levels frequently surpassing World Health Organisation guidelines, while lead occasionally exceeded prescribed values. Total Dissolved Solids also peaked during pre-monsoon months, signaling increased solute content.
Analysis indicated that median Hazard Quotient values suggest non-carcinogenic health risks, including neurological, reproductive, and developmental effects from arsenic exposure. The research highlighted that children are at a higher risk compared to adults.
Contaminant levels were found to be amplified at the confluence due to cumulative upstream loading and the mixing of distinct river systems. Sources include natural sediment mobilization and human inputs such as agricultural runoff and industrial effluents.
Researchers stressed the critical need for controlling heavy metal sources, implementing seasonal monitoring, and establishing community-level drinking water treatment systems. Recommendations include prioritized control of heavy metals, institutionalized seasonal monitoring, and the installation of community-scale treatment units.
