GLOBAL WATER CRISIS THREATENS CRITICAL MINERAL MINING

Why In News?

The International Council on Mining and Metals (ICMM) releases the Global Mining and Metals Water Report.

What is the Global Mining and Metals Water Report?

It is the first comprehensive study that maps how different physical water risks affect the entire mining sector worldwide

The report collects and analyzes data from 12,000 mining and processing facilities across 148 countries and regions

What are the Key Findings of the Report?

High Exposure to Water Risks

• Widespread Danger: About 66% of all facilities face at least one major physical water risk.

• High Water Stress: 38% of facilities operate in areas that already suffer from high water stress or arid conditions.

• Droughts: Extreme drought is the second biggest risk, hitting 27% of global sites.

• Floods: About 14% of facilities face high flood risks, particularly steel and alumina plants.

Global Water-Risk Hotspots

• Multiple Risks Together: 5% of global facilities face three or more water risks at the exact same time.

• Key Risk Zones: Compound risk hotspots include Chile, Peru, Southern Africa, Northern China, Central India, and Western Australia.

• Unpredictable Rain: In Oceania, 74% of facilities suffer from highly unpredictable water supply from year to year.

Why Water Risk is a Major Concern for Mining?

Critical Mineral Supply: Extreme drought threatens 74% of Platinum Group Elements (PGE) facilities, primarily concentrated in South Africa.

Compound Risk Exposure: Mining operations for clean energy metals like manganese, copper, and chromite face double the global average of compound water risks.

Energy Transition Bottlenecks: Water shortages disrupt the supply of essential transition minerals like copper, lithium, nickel, and rare earths, slowing down the production of solar panels, wind turbines, and electric vehicle (EV) batteries.

Escalating Operational Costs: Deeper mining for lower-grade ores requires more water for mineral processing. Unmanaged water risks trigger regulatory fines and force companies to secure expensive alternative water sources.

Supply Chain Disruptions: Geopolitical conflicts, such as the Middle East crisis, disrupt sulphur trade routes and spike the cost of sulphuric acid, a critical chemical for processing water-intensive minerals.

Social Conflicts: Mining in arid regions forces companies to compete directly with local farmers and rural communities for fresh water, sparking social unrest, road blockades, and the loss of a company's "social license to operate".

Major Challenges in Mining Water Management?

Climate Change & Water Scarcity: Rising temperatures, erratic rainfall and prolonged droughts are reducing freshwater availability. About 81% of mining facilities in Africa and the Middle East face high drought risks, increasing operational and environmental challenges.

Competing Water Demand: Mining requires large quantities of water for ore processing, dust suppression, slurry transport, mineral concentration and cooling, creating competition with agriculture, drinking water and ecosystem needs.

Groundwater Depletion: Continuous mine dewatering lowers groundwater tables, depletes aquifers and reduces water availability for nearby communities and ecosystems.

Water Pollution: Acid mine drainage, untreated effluents and leakage from tailings dams release heavy metals and toxic chemicals into rivers and groundwater, threatening biodiversity and public health.

Environmental Degradation: Open-pit mining, deforestation and excavation alter natural drainage patterns, increase soil erosion, sedimentation and flood risks.

Sustainable Critical Mineral Extraction: More than 50% of global lithium and copper production is located in high water-stress regions, making sustainable extraction increasingly difficult.

Weak Governance & Monitoring: Inadequate enforcement of environmental regulations, limited transparency and poor compliance with water-quality standards hinder sustainable water management.

Growing Demand for Critical Minerals: The clean-energy transition is increasing demand for lithium, copper, cobalt and rare earths, placing additional pressure on already stressed water resources.

Measures to Strengthen Water Security in Mining

Integrated Water Resource Management (IWRM): Adopt basin-level water governance involving governments, mining companies, farmers and local communities for equitable water allocation.

Water Recycling & Reuse: Expand closed-loop water systems, treated wastewater use and desalinated seawater. Projects such as Quellaveco (Peru) recycle about 85% of process water, while other major mines have achieved over 78% recycling through recirculation systems.

Water-Efficient Technologies: Promote dry-stack tailings, filtered tailings, thickened tailings, dry ore processing and high-efficiency water recovery systems to reduce freshwater consumption.

Catchment-Based Planning: Establish science-based water allocation limits and environmental flow requirements before approving mining projects in water-stressed basins.

Strengthen Tailings Management: Implement the Global Industry Standard on Tailings Management (GISTM), regular inspections and independent safety audits to minimise pollution risks.

Real-Time Digital Monitoring: Use cloud-based platforms, IoT sensors, satellite monitoring and digital twins (e.g., MIKE Mine) for continuous monitoring of water quantity and quality.

Climate Risk Integration: Incorporate long-term climate projections into mine planning, water balance modelling and infrastructure design.

Artificial Intelligence (AI): Deploy AI for predictive water management, leak detection, process optimisation and reducing water and energy intensity.

Shared Water Infrastructure: Develop common desalination plants, wastewater treatment facilities and regional water pipelines to reduce costs and environmental impacts.

Mine Water Treatment & Reuse: Treat acid mine drainage using advanced technologies such as membrane filtration, reverse osmosis and constructed wetlands before reuse or discharge.

Circular Mining Economy: Recover valuable minerals from mine tailings and waste, reducing pollution while improving resource efficiency. Mining generates around 100 billion tonnes of waste annually, making tailings reprocessing an important sustainability strategy.

Conclusion

To secure the critical minerals required for the clean energy transition, the mining sector must move beyond site-level water management and adopt rigorous, catchment-based water stewardship that protects vulnerable communities, ecosystems and long-term water security.  

Source: DOWNTOEARTH