Roughly 87% of the world’s population now has access to safely managed drinking water, up from 71% in 2018. That still leaves well over a billion people without water that meets the highest safety standard, and progress needs to accelerate sixfold to reach universal coverage by 2030. The picture is more nuanced than a single number, though, because “clean water” means different things depending on how you measure it.
What “Clean Water” Actually Means
Global health organizations track water access on a ladder with distinct levels. At the top, “safely managed” drinking water comes from a protected source, is available on your property whenever you need it, and is free from both bacterial and chemical contamination. This is the gold standard. Below that, “basic” water service means you use a protected source like a borehole or public tap, but the round trip to collect it takes up to 30 minutes, or it doesn’t meet all the contamination or availability requirements.
At the bottom of the ladder sit unimproved sources: unprotected wells, open springs, and surface water collected directly from rivers, lakes, or irrigation canals. People relying on these sources face the greatest health risks. When headlines report that billions lack “clean water,” the number changes dramatically depending on which rung of this ladder they’re measuring. A person with basic service has far better odds than someone drinking untreated river water, but neither meets the safely managed standard.
Where the Gaps Are Largest
The divide between urban and rural communities remains one of the starkest inequalities in global health. Cities benefit from piped infrastructure and centralized treatment systems, while rural areas often depend on wells, springs, or surface water that may or may not be protected. In low-income countries, the population lacking even basic hygiene services has actually grown, rising from 427 million to 502 million people over the past two decades. Lower-middle-income countries have fared better, cutting that number from 1.2 billion to 729 million, but the pace is uneven.
Sub-Saharan Africa and parts of South and Southeast Asia carry the heaviest burden. In many of these regions, women and girls spend hours each day collecting water, time that could otherwise go toward school or income. The 30-minute threshold used to define “basic” service sounds modest, but for hundreds of millions of families it represents a daily reality of walking to a distant well and carrying heavy containers home.
The Health Cost of Unsafe Water
Contaminated water fuels a cycle of disease that hits children hardest. Diarrheal illness alone kills roughly 444,000 children under five and another 51,000 children aged five to nine every year. It is the third leading cause of death in children between one month and five years old. Most of these deaths are preventable with safe drinking water, basic sanitation, and simple hygiene practices like handwashing.
Beyond diarrhea, unsafe water spreads cholera, typhoid, and parasitic infections that stunt growth and impair cognitive development. A child who survives repeated bouts of waterborne illness may still suffer long-term consequences: chronic malnutrition, missed school days, and reduced earning potential as an adult. The burden falls almost entirely on the world’s poorest communities.
Progress So Far
The trajectory is moving in the right direction. Over the past two decades, 2.2 billion people gained access to safely managed drinking water for the first time. Global coverage climbed from 71% in 2018 to a projected 87.3% by 2025, a meaningful jump in a relatively short window. Infrastructure investments, community-led water projects, and policy reforms all contributed to that acceleration.
But the gains haven’t been distributed evenly. Middle-income countries with growing economies have made the fastest progress, extending piped water networks and improving treatment capacity. Low-income countries, particularly those dealing with conflict, political instability, or climate shocks, have struggled to keep pace. In some cases, population growth has outstripped infrastructure development, meaning more people live without safe water even as percentages improve.
Why 2030 Targets Are at Risk
The United Nations Sustainable Development Goal 6 calls for universal access to safe and affordable drinking water by 2030. Current progress would need to increase sixfold to meet that target. At today’s pace, hundreds of millions of people will still lack safely managed water when the deadline arrives.
Water scarcity compounds the challenge. Without changes to consumption and pollution patterns, nearly half the world’s population could face severe water stress by 2030, meaning the physical supply of freshwater won’t meet demand. Climate change is intensifying droughts in some regions and flooding in others, both of which disrupt water infrastructure. A well that served a community for decades can run dry after consecutive drought years, erasing progress overnight.
The Economic Case for Investment
Clean water is not just a health issue. Every dollar invested in sanitation in developing countries returns an estimated $9 to $11 to the economy. Those returns come from reduced healthcare spending, fewer missed workdays, higher school attendance, and increased productivity. For communities where women spend hours collecting water, improved access frees up labor that flows directly into local economies.
The cost of inaction is equally concrete. Countries with high rates of waterborne disease spend more on emergency healthcare, lose productive workers to illness, and see slower economic growth. Children who miss school due to water-related sickness enter the workforce with less education and lower lifetime earnings. These costs accumulate across generations, making water access one of the highest-leverage investments available in global development.