Subject: Conservation & Mitigation

Why in the News?

In a recent study, researchers from WELL Labs in Chennai studied Aralumallige and Doddathumakuru gram panchayats in the Upper Arkavathy watershed near Bengaluru, and found a sharp drop in groundwater levels caused by intensive farming practices.

What drives groundwater depletion in the Deccan Plateau?

• Hard Rock Aquifers with Low Storage Capacity: The Deccan Plateau is underlain by basalt and granite (hard rock aquifers) that have limited porosity. These rely on fractures and weathered zones to store water, making them less efficient in holding groundwater. Eg: In Karnataka, 99% of the area depends on such aquifers, making sustainable storage difficult.

• Deep Borewell Drilling Alters Natural Recharge: Borewells drilled into granite cause microfractures, allowing rainwater to bypass shallow aquifers and flow deep underground. This disrupts the natural recharge cycle and reduces groundwater retention.  

• Water-Intensive Agriculture: Cultivation of vegetables, flowers, and exotic crops for urban markets like Bengaluru demands large volumes of groundwater. These crops are not suited to the dry, hard-rock geology of the region.  

• Encroachment of Traditional Recharge Systems: Lakes and tanks, once used for groundwater recharge, are being encroached upon or neglected. Their discharge channels are blocked, eliminating natural recharge opportunities. Eg: The lake in Aralumallige (Karnataka), once a major recharge source, remained dry in 2022 despite heavy rainfall.

Why is reliance on borewells unsustainable in rural Karnataka?

• Rapid Groundwater Depletion and Borewell Failures: Continuous extraction through deep borewells causes the water table to drop, making it harder to access groundwater over time. Eg: In the Upper Arkavathy watershed, the average borewell depth increased from 183m to 321m in just two decades. Over 70% of drinking water wells failed within 10 years of construction.

• High Financial Burden on Farmers and Panchayats: Drilling deeper borewells costs ₹4–5 lakh, often unaffordable for small farmers, with no guarantee of success. Free electricity for pumping increases electricity consumption and debt for gram panchayats. Eg: Panchayats face mounting electricity bills, diverting funds away from development works to cover power costs.

• Disruption of Natural Recharge and Local Hydrology: Borewells alter subsurface geology, causing rainwater to bypass shallow aquifers, reducing natural recharge. Eg: In Aralumallige and Doddathumakuru, borewell drilling weakened long-term water retention, contributing to chronic scarcity despite seasonal rains.

What is the socio-economic impact on local communities and governance?

• Rising electricity debt: Free power for farmers fuels overuse, pushing gram panchayats into unsustainable debts as they divert development funds to pay power bills.
• Borewell burden on small farmers: Drilling costs ₹4-5 lakh with no assurance of success, leading many farmers to lease land and migrate to cities.

What are the issues related to groundwater in Indian?

• Overexploitation and Depletion: Unregulated extraction of groundwater for agriculture and urban use has led to rapid depletion of water tables. Eg: In parts of Punjab, Haryana, and Karnataka (like Aralumallige), water tables have fallen by over 100 meters in two decades due to borewell dependence.

• Poor Groundwater Quality: Contamination by nitrates, fluoride, and arsenic poses serious health risks, especially in rural areas. Eg: In Bihar and West Bengal, arsenic contamination affects drinking water; in Karnataka, nitrate levels often exceed safe limits (50 mg/l).

• Inadequate Data and Poor Management: Lack of real-time monitoring, insufficient local-level data, and fragmented water governance hinder sustainable planning. Eg: Despite groundwater overuse, local panchayats often lack predictive tools to estimate borewell failure or manage recharge zones effectively.

What are the steps taken by the Indian Government? Jal Shakti Abhiyan (JSA): A nationwide water conservation campaign launched in 2019 to promote rainwater harvesting, recharge structures, and sustainable water use. Eg: In water-stressed blocks of states like Maharashtra and Rajasthan, the JSA promoted check dams and contour trenches to boost groundwater recharge. Atal Bhujal Yojana (Atal Jal): A World Bank-assisted scheme launched in 2019 for sustainable groundwater management in 7 states. It focuses on community participation, water budgeting, and crop water use efficiency. Eg: In Gujarat and Madhya Pradesh, water user associations have helped monitor and reduce groundwater extraction. Groundwater Regulation by Central Groundwater Authority (CGWA): The CGWA regulates groundwater usage in over-exploited areas by mandating No Objection Certificates (NOCs) for industries and commercial users.

Way forward: 

• Promote Sustainable Farming Practices: Shift from water-intensive crops (like paddy, sugarcane) to less water-demanding crops suited to agro-climatic conditions.
• Strengthen Local Water Governance: Empower Gram Panchayats to manage groundwater through community water budgeting, real-time monitoring, and local recharge efforts.

Mains PYQ:

[UPSC 2019] Enumerate the indirect taxes which have been subsumed in the goods and services tax (GST) in India. Also, comment on the revenue implications of the GST introduced in India since July 2017.

Linkage: The article talks about the GST replaced many older taxes like VAT and excise duty, helping create a single national market. Although GST collections have steadily grown—reaching ₹22.08 lakh crore in 2024–25—the revenue from tobacco (about ₹551 billion a year) is much less than the huge cost of tobacco-related health problems, which is ₹2,340 billion every year.

Why in the News?

It’s shocking that 2 billion people around the world still don’t have access to safe drinking water, even though 95% of the global population uses what are called “improved water sources”. This reveals a hidden but serious public health problem.

What defines ‘safe drinking water’? Safe drinking water refers to water that is free from harmful contaminants such as bacteria, viruses, and chemicals. It must be located on the premises, readily available when needed, and safe to consume without causing health issues.

How does access vary across populations?

• Majority Have Access, but Not Always at Home: While nearly 6 billion people have access to drinking water, around 2 billion still lack safe water at home.  Just 156 million people (around 1.4% of the global population) still collect water from unsafe sources like rivers or lakes.  

• Disparities Exist Across Income and Geography: People in low-income or rural areas are more likely to lack access to safe, on-premises water. In most parts of Sub-Saharan Africa and South Asia, people still get their water from open sources such as rivers and lakes.

How does a lack of safe water impact public health in poor countries?

• Spread of Waterborne Diseases: Unsafe water is a major source of diarrhoeal diseases like cholera, dysentery, polio, and hepatitis A. Over 800,000 deaths annually are attributed to waterborne illnesses, especially in low-income nations with inadequate sanitation.

• Child Mortality and Malnutrition: Contaminated water contributes to malnutrition, as diarrhoeal diseases hinder nutrient absorption in children. In India, nearly 21% of children under five suffer from wasting (NFHS-5), with poor water and sanitation as key contributors. 

• Healthcare Burden and Economic Loss: Frequent illness from unsafe water overwhelms fragile public health systems and reduces workforce productivity. In India, poor access to safe water and sanitation leads to an annual GDP loss of over 4% due to health and productivity issues (Ministry of Jal Shakti, 2021). 

SDG Goal 6 (Clean Water): Progress and challenges since its adoption  Progress in Access to Improved Water Sources: As of recent estimates, 95% of the global population uses an improved water source like piped water, borewells, and springs, even in many low-income countries. Challenge of Household-Level Accessibility: Despite improvements, safe water is often not available at home, requiring people—mostly women—to travel long distances. Around 1.5 billion people still lack on-premise access, which limits reliability and increases the risk of contamination during transport. Polluted water at the point of use: Water may be clean at the source, but it becomes contaminated during collection, storage, or transport.

What are the alternative technologies which can solve this crisis?

• Desalination Technology: Converts seawater into freshwater by removing salts and impurities using methods like reverse osmosis. Israel’s Sorek Desalination Plant provides 20% of the country’s water supply.

• Solar Water Disinfection (SODIS): Uses UV rays from sunlight to kill bacteria and viruses in water stored in transparent bottles. It is widely used in rural Africa and India by households.

• Atmospheric Water Generators (AWG): Extracts moisture from humid air and condenses it into clean drinking water. It was deployed in Rajasthan and UAE for areas with limited water but high humidity.

What are the steps taken by the Government? Jal Jeevan Mission (JJM): Aims to provide functional household tap connections (FHTCs) with safe and adequate drinking water to all rural households by 2024. Eg: As of 2024, over 13 crore rural households have been provided with tap water connections under JJM. Swachh Bharat Mission and Water Quality Monitoring: Focuses on reducing open defecation and water contamination by improving sanitation infrastructure and promoting hygiene.   Atal Mission for Rejuvenation and Urban Transformation (AMRUT): Ensures universal water supply coverage in urban areas, with a focus on poor and underserved households. Under AMRUT, cities like Surat and Nagpur have significantly improved their 24×7 piped water supply networks.

Way forward

• Strengthen Last-Mile Delivery through Infrastructure Expansion: Focus on household-level water connections, especially in rural and remote regions, by upgrading existing water supply networks and ensuring regular quality checks.
• Promote Community-Based Water Management and Awareness: Encourage local governance (Panchayats, SHGs) and water user groups to manage water resources and promote safe water handling practices.

Mains PYQ:

[UPSC 2024] The world is facing an acute shortage of clean and safe freshwater. What are the alternative technologies which can solve this crisis? Briefly discuss any three such technologies, citing their key merits and demerits.

Linkage: The artice talks about the emphasizes that for water to be considered “safe drinking water,” it must be “free from contamination, located at home, and available whenever needed. This question directly addresses the global issue of an “acute shortage of clean and safe freshwater”. This directly aligns with the core problem presented in the article , which states that “two billion people” still do not have safe drinking water in their homes.