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Introduction

Freshwater makes up about 3% of the Earth’s total water, and only about 1% is accessible for human use. Yet, nearly 2–3 billion people face water shortages annually (Source: UN World Water Development Report 2023). Understanding its reasons is essential to addressing the world’s deepening freshwater crisis.

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Reasons behind the declining availability of freshwater resources 

• Overextraction of groundwater: Excessive withdrawal of ground and surface water for agriculture, industry and domestic- use depletes aquifers faster than they recharge.                                                          Eg: India accounts for over 25% of the world’s total groundwater extraction, making it the largest user globally (UNESCO).
• Pollution of freshwater ecosystems: Untreated sewage, industrial waste, and chemical runoff make available water unusable.
  Eg: Over 60% of India’s rivers are polluted (CPCB, 2022).
• Climate change and altered hydrological cycles: Rising temperatures lead to retreating glaciers and irregular rainfall, reducing overall freshwater stocks.                                            
  Eg: The Andes glaciers are melting 35% faster than the global average, as reported by scientists at UNESCO’s first-ever World Day for Glaciers conference.
• Loss of wetlands and natural recharge zones: Urbanisation and changing land use patterns significantly reduce the natural capacity of ecosystems to retain and recharge freshwater sources.
  Eg: Bengaluru has lost 80% of its wetlands, affecting its water sustainability.
• Population growth: Rapid population growth escalates freshwater demand, often surpassing the natural replenishment capacity of available resources.

Factors limiting access to freshwater resources, even where it is available

• Inadequate infrastructure: Poor pipelines, lack of storage capacity, and high leakage hinders supply to end users.
  Eg: Up to 40% of urban water in developing countries is lost in transit (World Bank).
• Pollution and Source Contamination: Untreated sewage, toxic industrial discharges, and agrochemical runoff severely compromise freshwater safety.
  Eg: According to CPCB, over 70% of India’s surface water is now polluted.
• Political and legal hurdles: Water-sharing conflicts, overlapping jurisdictions restrict access even in water-rich regions.
• Social Marginalisation: Marginalised groups often lack access due to affordability or social exclusion.
  Eg: Dalit households in some villages face caste-based denial of access to common water sources.
• Poor water governance and policy gaps: Fragmented authority and lack of integrated planning result in inefficient delivery.
  Eg: India’s water governance spans multiple ministries, weakening coordination.
• Seasonal and temporal mismatch: Monsoonal rains bring surplus water briefly, yet lack of infrastructure to store and regulate flow results in seasonal scarcity.
  Eg: In Chennai, monsoon rains are abundant, yet the city endures regular summer droughts.

Conclusion

With timely investment in sustainable water management, inclusive infrastructure, and transboundary cooperation, the global freshwater crisis can be turned into an opportunity for resilience and equity. Strengthening data-driven policies and community engagement will be key to ensuring water security for future generations.

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