Environmental degradation and systemic inequality are leaving billions of people without access to safe drinking water and sanitation, according to a United Nations policy brief that underscores the growing intersection between climate pressures, public health risks, and human rights obligations.

The brief, prepared by the Office of the UN High Commissioner for Human Rights on behalf of UN-Water, estimates that around 2.1 billion people globally lack access to safely managed drinking water, while 3.4 billion do not have access to safely managed sanitation services.

The findings are intended to guide policymakers and government authorities in designing laws and strategies that address water scarcity and environmental stress through a human rights-based framework.Under international human rights law, states are required to ensure that water and sanitation services are available, accessible, affordable, acceptable, and of adequate quality.

These obligations are central to maintaining public health, supporting livelihoods, and ensuring a basic standard of dignity.Despite these commitments, the report highlights persistent and widespread gaps in service delivery. More than 1,000 children under the age of five die each day from diseases linked to unsafe water, poor sanitation, and inadequate hygiene.

The burden of water access also falls disproportionately on women and girls, who collectively spend an estimated 250 million hours daily collecting water, often under conditions that expose them to physical risk and limit opportunities for education and employment.

The report identifies chronic underinvestment in the water and sanitation sector as a major constraint, noting that funding levels remain insufficient relative to the scale of the challenge. This underinvestment comes despite the sector’s critical role in climate resilience, economic development, and disease prevention.

According to the brief, environmental degradation is compounding existing inequalities and disproportionately affecting marginalized populations. Groups identified as particularly vulnerable include women and girls, children, older persons, persons with disabilities, Indigenous communities, people living in poverty, and those displaced by conflict or environmental stress.

“For many, the denial of access to safe drinking water and sanitation is a result, not of scarcity alone, but of exclusion and inaccessibility woven into institutions and infrastructure,” the report states, highlighting structural barriers that limit equitable access.The document also draws attention to emerging and conflict-related threats to water security.

It notes that water infrastructure has increasingly been targeted in armed conflicts, in violation of international humanitarian law. In Gaza, the destruction of desalination facilities and damage to water systems has forced civilians to rely on contaminated supplies. In Sudan, attacks on water and electricity infrastructure have disrupted access for millions, while in Yemen, sanitation facilities supported by international organizations have been struck by airstrikes.

In addition to conflict-related risks, the brief identifies new pressures linked to technological and industrial expansion. The rapid growth of data centres, for example, is emerging as a significant but often overlooked source of water consumption. A single one-megawatt data centre can require more than 25 million litres of water annually for cooling, an amount roughly equivalent to the daily consumption needs of 300,000 people.

Amid these challenges, the report outlines examples of policy interventions that integrate human rights principles into water governance. Case studies from multiple countries illustrate how targeted reforms can improve access, affordability, and sustainability.In Bangladesh, a community-led initiative enabled residents in coastal areas to co-finance a climate-resilient water facility, with women trained to manage operations.

The program contributed to a reduction in waterborne diseases and improved school attendance among girls, and has since been replicated across hundreds of administrative wards.In Costa Rica, a water tariff reform introduced progressive pricing, charging higher rates for heavy users while offering subsidized rates for low-income households. The approach improved affordability for vulnerable populations while encouraging conservation, demonstrating how economic regulation can align with human rights objectives.

The brief emphasizes that such initiatives are most effective when supported by strong governance frameworks. It calls for greater transparency, public participation, and access to information, alongside legal mechanisms that allow individuals to seek redress when rights are violated.States are also urged to integrate water and sanitation priorities into broader policy frameworks, including climate adaptation plans, biodiversity strategies, and disaster risk reduction efforts.

The report highlights the need for financing models that are predictable, accessible, and aligned with human rights standards, as well as the importance of strengthening local governance capacities.Gender considerations are identified as a critical component of effective policy design.

The report calls for measures to address structural inequalities, including gender-responsive budgeting, increased representation of women in decision-making, and protections against gender-based violence linked to water access.The role of the private sector is also addressed, with the report referencing the UN Guiding Principles on Business and Human Rights. Companies are expected to conduct due diligence, disclose environmental and social impacts, and provide remedies where harm occurs.

Governments, in turn, are tasked with regulating corporate activity to prevent abuses affecting water and sanitation systems.UN High Commissioner for Human Rights Volker Türk said that addressing water and sanitation challenges requires sustained political and financial commitment. “Investment in water is an investment in dignity, equality, public health, and sustainable development,” he said in a statement marking World Water Day 2026.

The findings highlight the scale and complexity of the global water crisis, with environmental degradation, population pressures, and governance gaps continuing to strain already fragile systems.