Water and Sanitation
Water has always been central to human survival, health, and progress, but over the past several decades the demands placed on water resources have grown beyond sustainable limits. Rapid population growth, urbanization, industrial expansion, and agricultural intensification have combined with mismanagement to create a crisis of both quantity and quality. Many regions now face acute water stress, where available resources are insufficient to meet the needs of people, ecosystems, and economies. Pollution of rivers, lakes, and groundwater further compounds the challenge, making clean water increasingly scarce and costly to provide. These pressures fall most heavily on the poor and marginalized, for whom access to safe water and adequate sanitation remains uncertain or altogether absent. As the frequency of water-related crises grows—whether from droughts, floods, or contamination—the implications reach far beyond household needs, affecting public health, food and energy security, environmental balance, and economic stability.
The recognition of water as a basic human right and a foundation for development has grown through decades of global debate and action. The 1977 Mar del Plata Conference in Argentina marked a turning point by affirming that all people have the right to access drinking water in sufficient quantity and quality for their basic needs. This principle guided the International Drinking Water Supply and Sanitation Decade from 1981 to 1990, which aimed to mobilize resources and political will for universal water access. By 1992, the urgency of the water issue was reflected in Agenda 21, particularly Chapter 18, adopted at the Rio Earth Summit, and at the International Conference on Water and the Environment in Dublin. These milestones reinforced the idea that water management is not only a technical issue but also one tied to governance, participation, and sustainability. Soon after, the United Nations General Assembly designated World Water Day, observed annually on 22 March, and later World Toilet Day, to raise awareness of the sanitation crisis. These symbolic steps helped keep global attention on water and sanitation as essential to human dignity and environmental stewardship.
The early 2000s added further momentum. The Millennium Development Declaration of 2000 committed the world to halving, by 2015, the proportion of people lacking access to safe drinking water and basic sanitation. This was followed by the International Year of Freshwater in 2003 and the launch of the “Water for Life” Decade from 2005 to 2015, which sought to build cooperation and accelerate progress on water and sanitation goals. Recognizing the need for stronger coordination among international agencies, the United Nations Chief Executives Board established UN-Water in 2003 to bring together entities working on freshwater and sanitation. In 2008, the International Year of Sanitation was declared, further highlighting the urgency of tackling poor hygiene and sanitation as barriers to health and development. A major milestone came in July 2010 when the UN General Assembly passed Resolution 64/292, explicitly recognizing the human right to safe and clean drinking water and sanitation. This recognition underscored that access to these services is not a privilege but a fundamental right that governments must protect and deliver.
The adoption of the 2030 Agenda for Sustainable Development in 2015 brought a comprehensive vision for water through Sustainable Development Goal 6, which aims to ensure availability and sustainable management of water and sanitation for all. SDG 6 does not only call for universal access to drinking water and sanitation, but also includes targets on improving water quality, increasing efficiency of use, promoting integrated water resources management, protecting ecosystems, and strengthening international cooperation. The importance of water also cuts across other global frameworks. The Paris Agreement on climate change highlights the need to address water risks as part of adaptation strategies, while the Sendai Framework for Disaster Risk Reduction emphasizes resilience against water-related hazards such as floods and droughts. The World Economic Forum has repeatedly ranked water crises among the top three global risks, reflecting the severe consequences for economies and societies if these challenges are not managed effectively.
To sustain momentum and build on previous efforts, the UN General Assembly declared 2018–2028 the International Decade for Action on “Water for Sustainable Development.” This decade, launched on World Water Day in March 2018, seeks to accelerate progress on SDG 6 and related goals. The Decade emphasizes the need for integrated management of water resources to balance social, economic, and environmental priorities. It calls for the promotion and implementation of practical programmes and projects that expand access, improve efficiency, and protect water-related ecosystems. Equally important, the Decade seeks to strengthen cooperation and partnerships at all levels—local, national, regional, and global—to ensure that expertise, technology, and financing are shared and used effectively. This approach reflects the understanding that water is a shared resource and a common responsibility, requiring solidarity across borders and sectors.
The Action Plan for the Water Decade highlights several pressing priorities. It urges governments and stakeholders to adopt integrated approaches that link water management with agriculture, energy, health, and the environment, recognizing that water is at the core of sustainable development. It stresses the importance of building capacity, particularly in developing countries, where technical and institutional weaknesses often hinder progress. Greater investment in monitoring, data collection, and knowledge-sharing is also called for, as reliable information is essential for effective policy and planning. Furthermore, the plan encourages stronger involvement of civil society, private sector, and local communities, since sustainable solutions depend on inclusive participation and ownership. The Decade also places strong emphasis on disaster preparedness and climate adaptation, given the growing risks posed by floods, droughts, and extreme weather events that threaten water security worldwide.
Access to safe water and sanitation is far more than a matter of convenience; it is central to human dignity, public health, and the fight against poverty. Lack of safe drinking water leads to preventable diseases such as cholera and diarrhea, which kill thousands of children every day. Poor sanitation undermines nutrition and education, especially for girls who are often forced to miss school during menstruation due to lack of adequate facilities. Communities without reliable water access face obstacles in agriculture, reducing food security, and struggle to attract investment for economic growth. At the same time, ecosystems that sustain water supplies are under strain from pollution, deforestation, and unsustainable withdrawals. Protecting rivers, wetlands, and groundwater systems is therefore critical not only for biodiversity but for the long-term survival of human societies.
Despite these challenges, progress is possible and examples of success can be found worldwide. Countries that have prioritized water and sanitation in national policy agendas, combined with investments in infrastructure and strong community engagement, have seen dramatic improvements in health outcomes and economic resilience. Innovations in water-saving technologies, wastewater treatment, and decentralized sanitation systems are helping communities adapt to limited resources. At the global level, partnerships between governments, international organizations, civil society, and businesses are generating new models for financing and scaling up solutions. These efforts reflect a growing awareness that water security underpins sustainable development and that failing to act will have devastating consequences for generations to come.
The path ahead requires determination and collaboration. The Decade for Action on Water is not only a technical initiative but also a call for solidarity among nations and peoples. Governments must strengthen regulations, invest in infrastructure, and promote equitable access. International partners must provide support in terms of financing, technology, and knowledge. Communities must be empowered to participate in decision-making and to manage resources sustainably at the local level. Achieving Sustainable Development Goal 6—**Ensure availability and sustainable management of water and sanitation for all**—by 2030 will demand innovation, political will, and a recognition that water connects every dimension of life and development. By rethinking how water is valued, managed, and shared, humanity has an opportunity to turn one of the greatest challenges of our time into a foundation for a healthier, fairer, and more sustainable future.