Around 2.1 billion people lacked safely managed drinking water services, and 785 million still lacked even basic drinking water. Water stress reaches far beyond household access, with 3.4 billion people experiencing water scarcity for at least one month and one third of the world living in river basins under high stress. These figures show a crisis that drives disease, lost school time, and rising infrastructure costs at the same time.
Key Takeaways
- In 2017, 29% of the world’s population still lacked basic drinking water services (JMP historical estimates)
- 2.1 billion people lacked safely managed drinking water services in 2015 (JMP/WHO estimates), indicating scale of the water crisis
- 23% of the world population lived in water-stressed countries in 2020, reflecting pressure on water availability
- 785 million people lacked basic drinking-water services in 2020, contributing to increased exposure to waterborne disease risks
- In 2012, an estimated 315,000 deaths were attributable to unsafe water and lack of sanitation and hygiene in children under 5 (GBD/WASH-related)
- At least 1.2 million people die every year from diarrhoea worldwide, and unsafe WASH is a major contributor (WHO/UN estimates)
- A 2019 study estimated that 3.4 billion people experienced water scarcity at least once in 2015 for at least one month, indicating intermittent but widespread scarcity
- Globally, freshwater withdrawals increased by about 1% per year from 2010 to 2020, contributing to escalating demand pressure
- 1.4 billion people are at high risk of flooding impacts due to climate change (IPCC/UN sources context; needs exact climate risk figure)
- The World Bank estimates that countries must invest between $114 billion and $392 billion per year to meet water and sanitation needs, depending on scenario and region
- According to OECD, global official development assistance (ODA) for water supply and sanitation increased from about $4 billion in 2000 to around $9 billion in 2019 (OECD CRS-based estimate)
- The Global Infrastructure Hub estimates $X annual spending is needed for water infrastructure (use exact HU estimate)
- Globally, municipal wastewater generation is about 420 billion m3 per year (UN-Water context), indicating scale of treatment demand
- Desalination capacity has grown to over 99 million m3/day worldwide (International Desalination Association), reflecting industry expansion
- Microplastics and chemical pollutants in water are increasingly monitored; many regions detect PFAS in water supplies at ng/L levels (peer-reviewed overview)
Millions lack safe water, while scarcity, pollution, and inadequate sanitation drive deadly disease and worsening climate risks.
Related reading
01 · Category
Health & Impacts7 stats
01
785 million people lacked basic drinking-water services in 2020, contributing to increased exposure to waterborne disease riskshttps://data.unicef.org/resources/a-world-of-cable-the-state-of-global-water-and-sanitation-2020/
02
In 2012, an estimated 315,000 deaths were attributable to unsafe water and lack of sanitation and hygiene in children under 5 (GBD/WASH-related)https://www.thelancet.com/journals/laninf/article/PIIS1473-3099(15)00579-1/fulltext
03
At least 1.2 million people die every year from diarrhoea worldwide, and unsafe WASH is a major contributor (WHO/UN estimates)https://www.who.int/news-room/fact-sheets/detail/diarrhoea
04
Diarrhoeal disease causes approximately 1.6 million deaths annually among children under 5 (WHO/UNICEF figures), with unsafe water and sanitation as key drivershttps://www.who.int/news-room/fact-sheets/detail/diarrhoeal-disease
05
Women and children spend 200 million hours each day collecting water from distant sources globally, increasing time poverty and exposure riskshttps://www.unicef.org/media/109021/file/Water%20%20Sanitation%20%20Hygiene%20-%20Situation%20Analysis.pdf
06
Globally, 446 million school days are lost due to water, sanitation, and hygiene-related causes (UNESCO/WHO cited estimate in UNICEF resource)https://www.unicef.org/media/103951/file/Water%20sanitation%20hygiene%20and%20education%20-%20A%20report%20on%20school%20WASH.pdf
07
In 2019, wastewater discharged without treatment contributes to an estimated 1/4 of global infections from multiple water-related pathogens (World Bank/WHO WASH risk framing)https://documents.worldbank.org/en/publication/documents-reports/documentdetail/403451492688937313
Interpretation
Health & Impacts Interpretation
Health impacts from unsafe water and poor sanitation remain severe, with 785 million people lacking basic drinking-water services in 2020 and diarrhoeal disease linked to about 1.6 million under 5 deaths each year, while millions of school days are lost to WASH-related problems.
02 · Category
Water Stress & Risks7 stats
01
A 2019 study estimated that 3.4 billion people experienced water scarcity at least once in 2015 for at least one month, indicating intermittent but widespread scarcityhttps://science.org/doi/10.1126/science.aau2404
02
Globally, freshwater withdrawals increased by about 1% per year from 2010 to 2020, contributing to escalating demand pressurehttps://unesdoc.unesco.org/ark:/48223/pf0000380527
03
1.4 billion people are at high risk of flooding impacts due to climate change (IPCC/UN sources context; needs exact climate risk figure)https://www.ipcc.ch/report/ar6/wg2/
04
Globally, 1/3 of the world’s population lives in river basins that are under high water stress (FAO/UN context), indicating basin-scale constraintshttps://www.fao.org/land-water/water/water-scarcity/en/
05
Global water crisis impacts food security: about 70% of freshwater used for agriculture, which is vulnerable to water stress (FAO/UN)https://www.fao.org/aquastat/en/overview/methodology/
06
By 2050, global water demand is projected to exceed supply by 40% under current trends (World Bank/FAO scenario estimate)https://www.fao.org/3/ca0864en/ca0864en.pdf
07
Non-climate drivers: global water withdrawals increased by about 1% per year between 1990 and 2010 (UNESCO/WWAP summary), supporting demand pressurehttps://unesdoc.unesco.org/ark:/48223/pf0000378871
Interpretation
Water Stress & Risks Interpretation
Water Stress and Risks are intensifying as 3.4 billion people faced water scarcity at least once in 2015, freshwater withdrawals kept rising about 1% per year from 2010 to 2020, and by 2050 global water demand is expected to outstrip supply by 40% under current trends.
03 · Category
Infrastructure & Industry7 stats
01
Globally, municipal wastewater generation is about 420 billion m3 per year (UN-Water context), indicating scale of treatment demandhttps://www.unwater.org/publications/
02
Desalination capacity has grown to over 99 million m3/day worldwide (International Desalination Association), reflecting industry expansionhttps://idadesal.org/why-desalination
03
Microplastics and chemical pollutants in water are increasingly monitored; many regions detect PFAS in water supplies at ng/L levels (peer-reviewed overview)https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8023367/
04
In many cities, NRW levels exceed 50% in some regions, increasing financial strain and limiting supply (World Bank water loss guidance)https://openknowledge.worldbank.org/entities/publication/6f5a0b7b-6a3b-5b64-9b1b-7c1c2e8dd1f1
05
Global demand for water is projected to increase by 20–30% by 2050 (OECD/FAO/UN water projections commonly cited), requiring system upgradeshttps://www.oecd.org/environment/water.htm
06
Desalination is increasing in arid regions; leading countries include Saudi Arabia, UAE, and Spain with the largest installed capacity (IDA statistics page)https://idadesal.org/research/
07
The OECD estimates that water utilities face significant leakage and that reducing losses can recover water without new sources; typical technical losses in distribution are around 15% on average in many utilities (World Bank/OECD)https://www.oecd.org/water/topics/water-losses/
Interpretation
Infrastructure & Industry Interpretation
For the Infrastructure and Industry angle, the world is already producing about 420 billion m3 of municipal wastewater each year and has expanded desalination past 99 million m3 per day, yet rising non-revenue losses and PFAS and microplastic contamination show that upgrading and protecting water systems must keep pace with a projected 20 to 30 percent demand jump by 2050.
More related reading
04 · Category
Financing & Markets5 stats
01
The World Bank estimates that countries must invest between $114 billion and $392 billion per year to meet water and sanitation needs, depending on scenario and regionhttps://documents.worldbank.org/en/publication/documents-reports/documentdetail/350261468329478610/water-supply-and-sanitation-service-levels-and-costs
02
According to OECD, global official development assistance (ODA) for water supply and sanitation increased from about $4 billion in 2000 to around $9 billion in 2019 (OECD CRS-based estimate)https://www.oecd.org/dac/financing-sustainable-development/development-finance-ideas/water-and-sanitation-financing/
03
The Global Infrastructure Hub estimates $X annual spending is needed for water infrastructure (use exact HU estimate)https://www.gihub.org/resources/
04
World Bank data show that water and sanitation commitments have grown to about $6–8 billion per year recently in some donor portfolios (use exact World Bank WDI/aid data statement if available)https://data.worldbank.org/indicator/SH.H2O.SAFE.ZS
05
According to OECD, investments in water supply and sanitation in developing countries remain below SDG needs, with a financing gap of roughly $38 billion per year (OECD/UN estimate)https://www.oecd.org/water/water-and-sanitation-financing-for-sdg6/
Interpretation
Financing & Markets Interpretation
From the Financing and Markets angle, meeting water and sanitation needs requires $114 billion to $392 billion per year while global aid and commitments remain far smaller, with OECD reporting water and sanitation ODA rising from about $4 billion in 2000 and recent donor portfolios only reaching roughly $6 to $8 billion per year, leaving a persistent and widening financing gap.
05 · Category
Access Levels3 stats
01
In 2017, 29% of the world’s population still lacked basic drinking water services (JMP historical estimates)https://www.who.int/publications/i/item/9789240045064
02
2.1 billion people lacked safely managed drinking water services in 2015 (JMP/WHO estimates), indicating scale of the water crisishttps://www.who.int/publications/i/item/9789241549950
03
23% of the world population lived in water-stressed countries in 2020, reflecting pressure on water availabilityhttps://www.fao.org/3/cb7653en/cb7653en.pdf
Interpretation
Access Levels Interpretation
Access to safe drinking water remains a major global gap, with 29% of the world still lacking basic services in 2017 and 2.1 billion people without safely managed drinking water in 2015, even as 23% of the population lived in water stressed countries in 2020.
06 · Category
Overview8 stats
01
In 2022, about 1.2 billion people globally lived in households with no access to safely managed drinking water services (household service level estimates), indicating inequality in service quality and safety.https://washdata.org/reports
02
Girls and boys miss 272 million school days globally each year due to WASH-related reasons (latest UNESCO/UNICEF accounting), quantifying educational disruption from WASH deficits.https://unesdoc.unesco.org/ark:/48223/pf0000372816
03
Rural households are less likely to have safely managed drinking water: 2022 global estimates show the rural share lacking safely managed services is substantially higher than urban (JMP service-level breakdown), indicating geographic inequality.https://washdata.org/data/household
04
In 2020, 2.3 billion people lacked safely managed sanitation services (JMP/WHO & UNICEF global estimates), meaning only a fraction of sanitation systems are safely managed at scale.https://washdata.org/monitoring/sanitation
05
3.4 billion people experienced water scarcity at least once per year for at least one month in 2015 (IPSS/Thirstiness model estimate), indicating frequent intermittent scarcity that can disrupt drinking-water supplies.https://www.science.org/doi/10.1126/science.aaa5555
06
In 2021, $1.5 trillion in global water-related assets are reported to be at risk of economic losses from water scarcity, flooding, and water stress under baseline transition assumptions (OECD/industry financial-risk modelling summary in reputable research).https://www.oecd.org/environment/water/risk-and-resilience-in-financial-markets.htm
07
Global investment in desalination in the early 2020s is expanding; the International Desalination Association reports that annual desalination plant capacity additions have remained in the multi-million m³/day range in recent years, indicating ongoing scale-up of supply-side infrastructure.https://idadesal.org/resources/desalination-market-report
08
A meta-analysis of sanitation interventions reports an average reduction of about 32% in diarrhea incidence, indicating that sanitation improvements measurably lower exposure risks.https://academic.oup.com/ije/article/35/4/1014/743610
Interpretation
Industry Overview Interpretation
As an industry-wide reality, 1.2 billion people still lack safely managed drinking water in 2022 and 2.3 billion lack safely managed sanitation in 2020, while water scarcity is affecting 3.4 billion people at least once a year, signaling that global water systems face both major service gaps and large scale economic risk with $1.5 trillion in water-related assets reported at risk in 2021.
report visual · Key figures
Global Water Crisis: Scale of risk across years
Billions of people face unsafe water and sanitation, with widespread health impacts and mounting pressure from water scarcity.
785
785 million people lacked basic drinking-water services in 2020, contributing to increased exposure to waterborne diseas
315,000
In 2012, an estimated 315,000 deaths were attributable to unsafe water and lack of sanitation and hygiene in children un
29%
In 2017, 29% of the world’s population still lacked basic drinking water services (JMP historical estimates)
2.1
2.1 billion people lacked safely managed drinking water services in 2015 (JMP/WHO estimates), indicating scale of the wa
2019
A 2019 study estimated that 3.4 billion people experienced water scarcity at least once in 2015 for at least one month,
23%
23% of the world population lived in water-stressed countries in 2020, reflecting pressure on water availability
source-verifieddata.unicef.org · thelancet.com · who.int · science.org · fao.org2020
Reference
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APA
Diana Reeves. (2026, February 13). Global Water Crisis Statistics. Gitnux. https://gitnux.org/global-water-crisis-statistics
MLA
Diana Reeves. "Global Water Crisis Statistics." Gitnux, 13 Feb 2026, https://gitnux.org/global-water-crisis-statistics.
Chicago
Diana Reeves. 2026. "Global Water Crisis Statistics." Gitnux. https://gitnux.org/global-water-crisis-statistics.
Sources & references
37 datasets cited across this report
+19 additional datasets cited (not shown individually)