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| Meta Title | How is Singapore recycling wastewater to make it drinkable? | World Economic Forum |
| Meta Description | Singapore is recycling wastewater so it’s clean enough to drink. Other countries need water solutions too, as climate change leaves more facing shortages. |
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| Boilerpipe Text | Good enough to drink ... Singapore is recycling its wastewater.
Image: Unsplash/naja_bertolt_jensen
Listen to the article
Singapore is recycling its wastewater so it’s clean enough to drink.
The island state is one of the most water-stressed places in the world.
Climate change is leaving a growing list of countries facing water challenges.
There’s no single solution to this, but the World Bank says smart investment in clean water and sanitation solutions can help.
Singapore is taking the “waste” out of its wastewater by turning sewage into safe, clean drinking water using an advanced filtration and treatment system.
The
Changi Water Reclamation Plant
forms the core of the system, with capacity to treat up to 900 million litres of wastewater daily – roughly equivalent to the water held by 350 Olympic swimming pools.
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Land is in short supply in Singapore, because it is an island state, so much of the treatment system operates below ground. It reaches as far as 25 stories deep in places through an expansive network of tunnels, pipes, tanks, filtration equipment and other infrastructure.
Wastewater from sewers arrives at the plant through 48 kilometres of connected tunnels, where it is filtered and pumped to the surface. Bacteria, viruses and other impurities are then removed, first using a high-tech filtration system, then using ultraviolet rays to disinfect the water. The result is known as
“NEWater”, which is clean, safe and drinkable
.
Once treated, the water is used extensively by industries like the island’s large microchip manufacturing sector, which is heavily water dependent. It’s also put to work in the cooling systems that regulate temperatures in the numerous tall buildings that dominate the skyline –
temperatures in Singapore are rising at twice the rate of the world average
. And some treated water is used to top up reservoirs of drinking water, which can evaporate in the intense heat of the dry season.
Climate change is increasing the number and intensity of extreme weather events like droughts.
Image: REUTERS/Monicah Mwangi
Water stress: A global challenge
Almost a quarter of the global population has no access to safe drinking water.
Image: Our World in Data
More than 25% of the global population already has no access to safely managed drinking water, as defined by the World Health Organization and UNICEF. Think about that percentage for a second – that’s one in every four people.
Water access for all
The threat of water stress differs between regions and national income levels. While 98% of people living in high-income countries have access to a safe, uncontaminated supply of water on tap, this figure drops to 30% in Sub-Saharan Africa. And in low-income countries, almost 6% of people depend solely on surface water to drink – that’s any body of water above ground, including streams, rivers and lakes.
An
estimated 2 billion people – 26% of the global population – live in water-stressed countries
, according to UN Water.
UN Sustainable Development Goal 6 aims to ensure
access to safe drinking water and sanitation for all by 2030
. While progress is being made, more action is needed as the world is not on track to achieve this goal.
It’s important to recognize that there is no single solution to the differing challenges facing water-stressed countries.
Discover
What is the Forum doing to address the global water challenge?
High-tech water treatment systems like the one in Singapore can help in some developed countries, but these methods may not be suitable or affordable for many developing nations. The World Bank says there is a need for
smart investment in clean water and sanitation solutions
to help plug the gaps in global access to these essential resources.
Have you read?
Scaling up water reuse: Why recycling our wastewater makes sense
The US must rethink how it uses and reuses wastewater
These Dutch cities are using the circular economy to conserve water
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Don't miss any update on this topic
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# Singapore is leading the way in recycling wastewater. What can it teach the rest of the world?
Nov 30, 2022

Good enough to drink ... Singapore is recycling its wastewater.
Image: Unsplash/naja\_bertolt\_jensen
##### [Johnny Wood](https://www.weforum.org/stories/authors/johnny-wood/)
Writer, Forum Agenda
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##### Stay up to date:
#### Singapore
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This article is part of: [Centre for Urban Transformation](https://www.weforum.org/centres/centre-for-urban-transformation/)
Listen to the article
- Singapore is recycling its wastewater so it’s clean enough to drink.
- The island state is one of the most water-stressed places in the world.
- Climate change is leaving a growing list of countries facing water challenges.
- There’s no single solution to this, but the World Bank says smart investment in clean water and sanitation solutions can help.
Singapore is taking the “waste” out of its wastewater by turning sewage into safe, clean drinking water using an advanced filtration and treatment system.
The [Changi Water Reclamation Plant](https://www.pub.gov.sg/dtss/Pages/ChangiWaterReclamationPlant.aspx) forms the core of the system, with capacity to treat up to 900 million litres of wastewater daily – roughly equivalent to the water held by 350 Olympic swimming pools.
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Land is in short supply in Singapore, because it is an island state, so much of the treatment system operates below ground. It reaches as far as 25 stories deep in places through an expansive network of tunnels, pipes, tanks, filtration equipment and other infrastructure.
Wastewater from sewers arrives at the plant through 48 kilometres of connected tunnels, where it is filtered and pumped to the surface. Bacteria, viruses and other impurities are then removed, first using a high-tech filtration system, then using ultraviolet rays to disinfect the water. The result is known as [“NEWater”, which is clean, safe and drinkable](https://www.livemint.com/science/news/how-singapore-is-turning-sewage-into-ultra-clean-water-11628564552806.html).
Once treated, the water is used extensively by industries like the island’s large microchip manufacturing sector, which is heavily water dependent. It’s also put to work in the cooling systems that regulate temperatures in the numerous tall buildings that dominate the skyline – [temperatures in Singapore are rising at twice the rate of the world average](https://www.bloomberg.com/news/features/2020-02-25/singapore-has-a-100-billion-plan-for-adapting-to-climate-change). And some treated water is used to top up reservoirs of drinking water, which can evaporate in the intense heat of the dry season.
[](https://pictures.reuters.com/CS.aspx?VP3=SearchResult&VBID=2C0FCIQWDFUEP&SMLS=1&RW=1636&RH=891#/SearchResult&VBID=2C0FCIQWDFUEP&SMLS=1&RW=1636&RH=891&POPUPPN=47&POPUPIID=2C0FQEJ8RY2VB)
Climate change is increasing the number and intensity of extreme weather events like droughts. Image: REUTERS/Monicah Mwangi
**Water stress: A global challenge**
Despite being surrounded by seawater, [Singapore is one of the most water-stressed countries in the world](https://eresources.nlb.gov.sg/infopedia/articles/SIP_2020-02-20_192848.html#:~:text=Singapore%20is%20considered%20to%20be,available%20for%20water%20storage%20facilities.) when it comes to drinking water.
With few freshwater resources of its own and limited land for reservoirs, [the government relies heavily on output from desalination plants](https://www.pub.gov.sg/watersupply/fournationaltaps/desalinatedwater#:~:text=Currently%2C%20we%20have%20three%20desalination,future%20water%20needs%20by%202060.) and imported drinking water from neighbouring Malaysia.
Singapore is one of a growing number of countries facing the threat of water stress. The climate crisis is increasing the number and intensity of extreme weather events like droughts. With the [global population also set to hit 9.9 billion by 2050](https://sdg.iisd.org/news/world-population-to-reach-9-9-billion-by-2050/), this is putting unsustainable pressure on the planet’s scarce water resources.
[](https://ourworldindata.org/water-access)
Almost a quarter of the global population has no access to safe drinking water. Image: Our World in Data
More than 25% of the global population already has no access to safely managed drinking water, as defined by the World Health Organization and UNICEF. Think about that percentage for a second – that’s one in every four people.
**Water access for all**
The threat of water stress differs between regions and national income levels. While 98% of people living in high-income countries have access to a safe, uncontaminated supply of water on tap, this figure drops to 30% in Sub-Saharan Africa. And in low-income countries, almost 6% of people depend solely on surface water to drink – that’s any body of water above ground, including streams, rivers and lakes.
An [estimated 2 billion people – 26% of the global population – live in water-stressed countries](https://www.unwater.org/publications/summary-progress-update-2021-sdg-6-water-and-sanitation-all), according to UN Water.
UN Sustainable Development Goal 6 aims to ensure [access to safe drinking water and sanitation for all by 2030](https://www.unwater.org/sites/default/files/app/uploads/2021/12/SDG-6-Summary-Progress-Update-2021_Version-July-2021a.pdf). While progress is being made, more action is needed as the world is not on track to achieve this goal.
It’s important to recognize that there is no single solution to the differing challenges facing water-stressed countries.
Discover
What is the Forum doing to address the global water challenge?
Show more
Water security – both sustainable supply and clean quality – is a critical aspect in ensuring healthy communities. Yet, our world’s water resources are being compromised.
Today, 80% of our wastewater flows untreated back into the environment, while 780 million people still do not have access to an improved water source. By 2030, we may face a 40% global gap between water supply and demand.
The World Economic Forum’s Water Possible Platform is supporting innovative ideas to address the global water challenge.
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Accept cookies
The Forum supports innovative multi-stakeholder partnerships including the [2030 Water Resources Group](https://www.2030wrg.org/), which helps [close the gap between global water demand and supply by 2030](https://youtu.be/qb9SNneoN_I) and has since helped facilitate \$1Billion of investments into water.
Other emerging partnerships include the [50L Home Coalition](https://50lhome.org/), which aims to [solve the urban water crisis](https://www.wbcsd.org/Programs/Food-and-Nature/Water/Resources/50L-Home-Coalition), tackling both water security and climate change; and the [Mobilizing Hand Hygiene for All Initiative](https://www.weforum.org/platforms/covid-action-platform/projects/mobilizing-hand-hygiene-for-all-initiative), formed in response to close the 40% gap of the global population not having access to handwashing services during COVID-19.
Want to join our mission to address the global water challenge? Read more in our [impact story](https://www.weforum.org/our-impact/closing-the-water-gap).
High-tech water treatment systems like the one in Singapore can help in some developed countries, but these methods may not be suitable or affordable for many developing nations. The World Bank says there is a need for [smart investment in clean water and sanitation solutions](https://www.worldbank.org/en/topic/water/overview) to help plug the gaps in global access to these essential resources.
##### Have you read?
- ##### [Scaling up water reuse: Why recycling our wastewater makes sense](https://www.weforum.org/stories/2021/09/scaling-up-water-reuse-recycling-wastewater/)
- ##### [The US must rethink how it uses and reuses wastewater](https://www.weforum.org/stories/2022/04/wastewater-us-circular-rethink/)
- ##### [These Dutch cities are using the circular economy to conserve water](https://www.weforum.org/stories/2021/08/water-sustainability-circular-economy-water-stressed-wastewater/)
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Accept cookies
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The views expressed in this article are those of the author alone and not the World Economic Forum.
##### Related topics:
[Climate Action and Waste Reduction](https://www.weforum.org/stories/climate-action/)
[Urban Transformation](https://www.weforum.org/stories/urban-transformation/)
##### Share:

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| Readable Markdown | 
Good enough to drink ... Singapore is recycling its wastewater.
Image: Unsplash/naja\_bertolt\_jensen
Listen to the article
- Singapore is recycling its wastewater so it’s clean enough to drink.
- The island state is one of the most water-stressed places in the world.
- Climate change is leaving a growing list of countries facing water challenges.
- There’s no single solution to this, but the World Bank says smart investment in clean water and sanitation solutions can help.
Singapore is taking the “waste” out of its wastewater by turning sewage into safe, clean drinking water using an advanced filtration and treatment system.
The [Changi Water Reclamation Plant](https://www.pub.gov.sg/dtss/Pages/ChangiWaterReclamationPlant.aspx) forms the core of the system, with capacity to treat up to 900 million litres of wastewater daily – roughly equivalent to the water held by 350 Olympic swimming pools.
0 seconds of 3 minutes, 4 secondsVolume 90%
Press shift question mark to access a list of keyboard shortcuts
00:00
00:00
03:04
Land is in short supply in Singapore, because it is an island state, so much of the treatment system operates below ground. It reaches as far as 25 stories deep in places through an expansive network of tunnels, pipes, tanks, filtration equipment and other infrastructure.
Wastewater from sewers arrives at the plant through 48 kilometres of connected tunnels, where it is filtered and pumped to the surface. Bacteria, viruses and other impurities are then removed, first using a high-tech filtration system, then using ultraviolet rays to disinfect the water. The result is known as [“NEWater”, which is clean, safe and drinkable](https://www.livemint.com/science/news/how-singapore-is-turning-sewage-into-ultra-clean-water-11628564552806.html).
Once treated, the water is used extensively by industries like the island’s large microchip manufacturing sector, which is heavily water dependent. It’s also put to work in the cooling systems that regulate temperatures in the numerous tall buildings that dominate the skyline – [temperatures in Singapore are rising at twice the rate of the world average](https://www.bloomberg.com/news/features/2020-02-25/singapore-has-a-100-billion-plan-for-adapting-to-climate-change). And some treated water is used to top up reservoirs of drinking water, which can evaporate in the intense heat of the dry season.
[](https://pictures.reuters.com/CS.aspx?VP3=SearchResult&VBID=2C0FCIQWDFUEP&SMLS=1&RW=1636&RH=891#/SearchResult&VBID=2C0FCIQWDFUEP&SMLS=1&RW=1636&RH=891&POPUPPN=47&POPUPIID=2C0FQEJ8RY2VB)
Climate change is increasing the number and intensity of extreme weather events like droughts. Image: REUTERS/Monicah Mwangi
**Water stress: A global challenge**
[](https://ourworldindata.org/water-access)
Almost a quarter of the global population has no access to safe drinking water. Image: Our World in Data
More than 25% of the global population already has no access to safely managed drinking water, as defined by the World Health Organization and UNICEF. Think about that percentage for a second – that’s one in every four people.
**Water access for all**
The threat of water stress differs between regions and national income levels. While 98% of people living in high-income countries have access to a safe, uncontaminated supply of water on tap, this figure drops to 30% in Sub-Saharan Africa. And in low-income countries, almost 6% of people depend solely on surface water to drink – that’s any body of water above ground, including streams, rivers and lakes.
An [estimated 2 billion people – 26% of the global population – live in water-stressed countries](https://www.unwater.org/publications/summary-progress-update-2021-sdg-6-water-and-sanitation-all), according to UN Water.
UN Sustainable Development Goal 6 aims to ensure [access to safe drinking water and sanitation for all by 2030](https://www.unwater.org/sites/default/files/app/uploads/2021/12/SDG-6-Summary-Progress-Update-2021_Version-July-2021a.pdf). While progress is being made, more action is needed as the world is not on track to achieve this goal.
It’s important to recognize that there is no single solution to the differing challenges facing water-stressed countries.
Discover
What is the Forum doing to address the global water challenge?
High-tech water treatment systems like the one in Singapore can help in some developed countries, but these methods may not be suitable or affordable for many developing nations. The World Bank says there is a need for [smart investment in clean water and sanitation solutions](https://www.worldbank.org/en/topic/water/overview) to help plug the gaps in global access to these essential resources.
##### Have you read?
- ##### [Scaling up water reuse: Why recycling our wastewater makes sense](https://www.weforum.org/stories/2021/09/scaling-up-water-reuse-recycling-wastewater/)
- ##### [The US must rethink how it uses and reuses wastewater](https://www.weforum.org/stories/2022/04/wastewater-us-circular-rethink/)
- ##### [These Dutch cities are using the circular economy to conserve water](https://www.weforum.org/stories/2021/08/water-sustainability-circular-economy-water-stressed-wastewater/)
Accept our marketing cookies to access this content.
These cookies are currently disabled in your browser.
##### Don't miss any update on this topic
Create a free account and access your personalized content collection with our latest publications and analyses.
[Sign up for free](https://www.weforum.org/join-us/individuals)
License and Republishing
World Economic Forum articles may be republished in accordance with the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Public License, and in accordance with our Terms of Use.
The views expressed in this article are those of the author alone and not the World Economic Forum.

## Forum Stories newsletter
Bringing you weekly curated insights and analysis on the global issues that matter.
### More on Climate Action and Waste Reduction [See all](https://www.weforum.org/stories/climate-action/)
[](https://www.weforum.org/stories/2025/11/planet-technologies-helping-restore-balance-frontier-tech/)
Jeremy Jurgens
November 13, 2025
Min HU
November 13, 2025
Nov 13, 2025
Alejandra Castro, Cassio Ferreira, Ana Gonzalez Pelaez and Nathanial Matthews
November 11, 2025
Sha Song, Wee Kean Fong and Laia Barbarà
November 11, 2025 |
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| Unparsed URL | org,weforum!www,/stories/2022/11/singapore-wastewater-recycling-water-stressed/ s443 |