10. Water Contamination: Evaluating Technologies for Fluoride Removal in India

The Union Government has commissioned a targeted research project to reassess and map fluoride contamination across India. This initiative aims to evaluate the efficacy of current treatment technologies— ranging from large-scale community plants to household purifiers—to address the persistent public health crisis of fluorosis. With NITI Aayog estimating 200,000 deaths annually due to inadequate safe water access, the move signals a shift toward modernizing aging standards like the Nalgonda technique to align with contemporary technological advancements. Key Summary Points • Technological Reassessment: The project focuses on evaluating the effectiveness of existing fluoride removal systems in at least 10 urban and rural locations, aiming to upgrade the Bureau of Indian Standards (BIS) protocols (IS 12742:1989). • Geographical Hotspots: Fluoride contamination is primarily geogenic (natural mineral leaching), concentrated in states including Rajasthan, Telangana, Andhra Pradesh, Karnataka, Gujarat, Uttar Pradesh, and Bihar. • Public Health Impact: Prolonged consumption of highfluoride water leads to Dental Fluorosis (tooth discoloration) and progresses to Skeletal Fluorosis, causing bone deformities, joint stiffness, and permanent mobility issues. • Limitations of the Nalgonda Technique: While historically significant as a low-cost method using alum and lime, this technique is being scrutinized for its inability to meet modern safety and operational standards in the field. • Monitoring Gaps: Recent contamination-linked deaths in cities like Indore highlight a critical need for better monitoring, maintenance, and operational standards for water treatment plants. • Vulnerability Factor: Rural and low-income populations remain the most at risk due to a heavy dependence on untreated groundwater and a lack of decentralized, high-efficiency purification systems. Key Definitions • Fluorosis: A chronic condition caused by excessive intake of fluorine compounds, marked by mottling of teeth and, in severe cases, calcification of ligaments and skeletal deformities. • Nalgonda Technique: A method developed in India involving the addition of Aluminium salts (Alum), Lime, and Bleaching powder to water, followed by rapid mixing, flocculation, and sedimentation to remove fluoride. • Geogenic Contamination: Contamination that results from natural geological processes, such as the weathering of rocks and minerals, rather than human activity (anthropogenic). Constitutional & Legal Provisions • Article 21: The Right to Life includes the right to clean and safe drinking water as a fundamental necessity for human survival and dignity. • Article 47: A Directive Principle mandating the State to improve public health and raise the level of nutrition as a primary duty. • The Water (Prevention and Control of Pollution) Act, 1974: Provides the legal framework for maintaining or restoring the wholesomeness of water and preventing its contamination. • Jal Jeevan Mission (JJM): A central flagship program aiming to provide Functional Household Tap Connections (FHTC) to every rural household by 2024, with a specific component for treating contaminated water in \'Quality Affected\' habitations. Conclusion The government\'s decision to evaluate and map fluoride treatment technologies is a vital step toward ensuring water security. However, technology alone cannot solve the crisis; it must be coupled with rigorous localized monitoring, community-level maintenance training, and a shift from the aging Nalgonda process to more efficient membrane-based or adsorption technologies. Addressing the geogenic roots of this contamination is essential to prevent a long-term public health catastrophe that disproportionately affects India\'s rural poor. UPSC Relevance • GS Paper II: Government policies and interventions for development in various sectors; Issues relating to development and management of Social Sector/Services relating to Health and Water. • GS Paper III: Environmental pollution and degradation; Science and Technology- developments and their applications in everyday life (Water purification tech). • Prelims Focus: Nalgonda Technique, types of Fluorosis, states with high groundwater contamination, and NITI Aayog\'s Composite Water Management Index (CWMI).