Countries with the Least Access to Clean Water (2025 Ranked)

Access to safe drinking water is the most fundamental of all development indicators — without it, health outcomes, education, economic productivity, and gender equality all deteriorate. The WHO/UNICEF Joint Monitoring Programme (JMP) tracks progress on water, sanitation, and hygiene (WASH) globally.

The JMP distinguishes between "basic" access (improved source, collection time under 30 minutes) and "safely managed" access (on premises, available when needed, free from contamination). The latter is the meaningful standard for health outcomes.

Key takeaways

• 2.2 billion people lack access to safely managed drinking water; 3.5 billion lack safely managed sanitation.
• Papua New Guinea, Ethiopia, Niger, and DR Congo have the lowest proportions of population with even basic water access (under 50%).
• Waterborne diseases (primarily diarrhoea, cholera, typhoid) kill approximately 1.5 million people annually — mostly children under 5.
• Every $1 invested in water and sanitation returns approximately $4–5 in economic benefits through reduced healthcare costs and productivity gains.
• Climate change is making water security worse — more frequent droughts and floods contaminate or reduce water sources.

Countries by access to basic drinking water

(% of population with access to at least basic drinking water, JMP 2022)

Rank	Country	Basic water access	Safely managed	Notes
1	Papua New Guinea	36%	13%	Most limited in Pacific
2	Equatorial Guinea	48%	18%
3	Chad	47%	10%	Conflict + drought
4	Niger	48%	12%
5	DR Congo	49%	15%	102M people; massive gap
6	Madagascar	53%	17%
7	Central African Republic	53%	16%
8	Ethiopia	57%	21%	Largest in absolute terms
9	Nigeria	60%	13%	220M people; huge absolute gap
10	South Sudan	59%	12%	World's newest country
11	Somalia	50%	14%
12	Mozambique	61%	19%
13	Guinea-Bissau	62%	21%
14	Burkina Faso	65%	18%
15	Sierra Leone	67%	14%
—	United States	99%	97%	—
—	UK	100%	100%	—
—	Germany	100%	100%	—

Source: WHO/UNICEF Joint Monitoring Programme (JMP) Progress on Drinking-Water, Sanitation and Hygiene (2022), World Bank water access data.

Where This Data Comes From

Water access data come from the WHO/UNICEF Joint Monitoring Programme (JMP), which conducts surveys in every country approximately every two years, drawing on Demographic and Health Surveys (DHS), MICS surveys, and national census data. The JMP defines "basic" water access as improved water source within 30 minutes' collection time; "safely managed" requires water on premises, available when needed, and free from E. coli and faecal contamination (verified by water testing). The distinction is critical: a village may have a protected well (basic) but no testing (not safely managed). The figures reported here are from the 2022 JMP round, the most recent comprehensive assessment. Data is collected via household surveys asking about water collection methods, time, and costs; waterborne disease data come from WHO mortality databases and disease surveillance systems in reporting countries. Important limitation: data collection methods and survey sampling vary by country, so figures are estimates; countries with weak health information systems may underreport disease burden.

What Water Access Patterns Reveal About Development Stage and Governance

The water access ranking exposes a harsh reality: safe water correlates more strongly with governance quality and historical development stage than with geography or climate. The DRC, sitting atop vast freshwater reserves (the Congo River basin), ranks among the world's lowest in access — a governance failure, not water scarcity. Papua New Guinea's 36% reflects not tropical climate impossibility (Fiji and other tropical island nations achieve 90%+) but uneven infrastructure investment and extremely dispersed population. By contrast, Ethiopia's 57% and Nigeria's 60% represent millions of people living without safe water not because technology doesn't exist but because governments and donors have not prioritised it relative to other spending. Sub-Saharan Africa accounts for 60% of the global population without basic water access, not because it lacks water geographically but because historical colonial underinvestment in infrastructure was never fully remedied post-independence. Water access is thus as much a political economy problem as a technical one — it requires sustained government budgets, maintenance systems, and accountability that remain insufficient in most low-income countries.

The scale of the problem

The numbers require contextualisation to understand their human meaning:

2.2 billion people without safely managed water: To have "safely managed" water, it must be on your premises (not a shared well 200m away), available whenever you need it, and free from faecal contamination. These seem like low bars — but meeting all three requirements for rural households in Sub-Saharan Africa and South Asia requires infrastructure investment that governments and donors have not prioritised.

The diarrhoea burden: Diarrhoeal diseases kill approximately 1.5 million people per year — 88% attributable to unsafe water, inadequate sanitation, and poor hygiene. A child dies every two minutes. These deaths are almost entirely preventable with water treatment, handwashing facilities, and sanitation. Unlike AIDS or malaria — which require pharmaceutical interventions — diarrhoeal disease prevention requires infrastructure and behaviour change.

The time burden on women: In households without piped water, water collection falls almost entirely on women and girls. The UN estimates women globally spend 200 million hours per day collecting water. This time cost reduces girls' school attendance and limits women's economic activity — water access is a gender equality issue.

Sub-Saharan Africa: the core challenge

Sub-Saharan Africa accounts for approximately 60% of the global population without basic water access:

Ethiopia: Despite 57% basic water access nationally, Ethiopia's 125 million people mean approximately 54 million Ethiopians lack even basic access. Ethiopia's government and international donors have invested heavily in water infrastructure — the headline numbers have improved from ~40% in 2000. But the pace required to serve a rapidly growing population is extraordinary.

Nigeria: Nigeria's 60% basic access figure conceals massive urban-rural variation. Lagos, Abuja, and Port Harcourt have reasonable formal water systems (though unreliable and often requiring supplementary private water vendors). Rural northern Nigeria, Borno state, and parts of the Middle Belt have severely limited access.

The DRC paradox: The Democratic Republic of Congo contains more than 50% of Africa's surface freshwater — the Congo River basin is the world's second-largest river by flow volume. Yet less than 50% of Congolese have basic water access. This illustrates that water scarcity per se is not the problem in DRC — governance, conflict, and infrastructure investment failures are.

Pacific Islands: the forgotten crisis

Papua New Guinea's 36% basic water access is the lowest figure of any country in the Pacific and lower than many Sub-Saharan African nations:

Geography challenges: PNG's rugged terrain — over 600 islands, highland valleys isolated by mountain ranges — makes centralised water infrastructure prohibitively expensive. Villages in the highlands and remote islands have effectively no piped water.

Cholera: PNG has experienced cholera outbreaks repeatedly — cholera is endemic in areas without water treatment. The 2023–2024 outbreak affected over 100,000 people. Cholera has been eliminated from wealthy countries through water treatment; it persists where investment hasn't occurred.

The urban-rural split: Port Moresby and Lae have formal water systems — imperfect but present. Rural PNG (where 85% of the population lives) overwhelmingly relies on rivers, springs, and rainwater collection without treatment.

The climate change dimension

Water access is increasingly threatened by climate change:

Groundwater depletion: Over-extraction of groundwater — for irrigation and urban supply — is depleting aquifers that took thousands of years to fill. The Ogallala Aquifer (central US), North China Plain, and Northwest India are among the world's most important agricultural aquifers, all facing depletion within decades. When aquifers are exhausted, the water is simply gone.

Glacial retreat: The Himalayas and Andes provide dry-season water to hundreds of millions of people through glacial meltwater. As glaciers retreat due to warming, dry-season river flows are initially increasing (as glaciers melt faster) then will decline as glaciers disappear. Pakistan, India, Peru, and Bolivia are most at risk.

Extreme events: Droughts reduce surface and groundwater availability; floods contaminate water sources with faecal material and toxins. Both extremes are becoming more frequent with climate change. The 2022 Pakistan floods contaminated drinking water sources across the Indus Valley, triggering cholera, typhoid, and hepatitis A outbreaks.

Frequently asked questions

How much water does a person need per day?

The WHO minimum recommendation is 20 litres per day for basic needs (drinking, cooking, hygiene). The average American uses approximately 380 litres per day (including domestic uses); the average Ethiopian has access to approximately 15–20 litres. The difference in lifestyle quality this represents — no running water for washing, no reliable supply for cooking, vulnerability to waterborne disease — is difficult to overstate from a wealthy country perspective.

Why isn't private sector investment solving the water crisis?

Water supply in rural, low-income communities is not commercially viable — the population cannot afford prices that would cover infrastructure and operating costs. This is why water is universally treated as a public good requiring government provision or subsidy, even in market economies. Private sector involvement in urban water systems (concessions, public-private partnerships) has a mixed record — sometimes improving efficiency, sometimes prioritising wealthier paying customers over the poor.

What works to improve water access?

Evidence-backed approaches: community-managed rural water systems (with proper training and maintenance budgets), point-of-use water treatment (chlorination tablets, solar disinfection, household filters), construction and maintenance of protected springs and wells, and piped water systems in cities (requiring utility management reform in many countries). The key is not technology — cheap effective solutions exist — but sustained maintenance financing and community engagement.

The bottom line

2.2 billion people without safely managed water in a world that has the technology and the aggregate wealth to provide it is a choice — the choice to underfund water infrastructure globally. The DRC has more freshwater than it could ever use; its 49% basic access rate is a governance failure. Nigeria's oil wealth and 60% access rate reflect decades of infrastructure investment prioritised toward petroleum extraction rather than population services. Climate change is adding pressure to a system already failing hundreds of millions. The economic case for water investment — $4–5 return per $1 invested — is overwhelming. The political case — a child dying every two minutes from preventable waterborne disease — should be overwhelming. It isn't, primarily because the political systems in high-income countries that control most of the world's development finance don't feel the deaths of children in rural Chad or the time costs of women in rural Ethiopia.

Related Reading

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• Countries with the Largest Freshwater Reserves
• Countries with the Most Hunger
• Countries with the Best Tap Water
• Countries with the Most Natural Disasters