BioSand Water Filters

Great Barriers to Clean Water in Cambodia

Please enjoy part of an interview with Kanhchana Thoy, CWEF Director in Cambodia: 

  1. How many people in Cambodia do not have clean water? According to the latest available data from 2020, More than 12 million people in Cambodia (72% of the population) lack access to safe water.  Most of them live in rural areas. 
  2. What keeps people in Cambodia from getting clean water? There are multiple factors. The first is that the income people earn is too low to afford better access. The second is a lack of knowledge about the nature and impact of the water they are using as well as lack of knowledge about how to make the water safer.  The third major influence is cultural practices. For example, one group of rural people receiving clean water support from CWEF is the Jerai people. Their habit is to use mountain runoff water directly without boiling it, and they previously did not realize how nearby human waste and animals contaminate their water. But through your support, CWEF has been able to teach and equip the Jerai people with the knowledge, skills, and tools to have clean water on a daily basis.  
  3. How does CWEF choose who to give water filters to? Since the need is greatest in rural areas, we seek to work with low-income communities in rural areas of Cambodia. Also, we look for communities whose leaders are motivated and interested in partnering with us. 
  4. How many water filters did CWEF give out in Cambodia last year? Last year we gave out 30 biosand water filters in Chang Village and 30 biosand water filters to the villages of Deh and Samkanigh in Rattanakiri province.  So far this year, we have distributed 60 biosand water filters in Davealeng village, Deh village, Banlung, and other villages.

Think of each of these individual families – their grandparents, parents, and children – who now not only understand how their drinking water was contaminated and causing illness, but they are now empowered to sustainably access clean water every day!  These families are experiencing greater health and happiness and are spending less money cleaning their water and treating water-borne illnesses because of you and your generosity!  What better way to transform someone’s life?  Thank you so much for your heart for clean water for families in Cambodia!

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CWEF biosand water filter recipient, Yun, drinking a cup of filtered water and standing next to the biosand water filter

Man at Work

Yun’s family kept borrowing money. More and more money, more and more debt. What could he do? Everyday life simply cost too much. He couldn’t afford the things his family needed to survive. 

Yun is a young man of twenty-five years old and lives in Kampong Thom Province in Cambodia. 

He and his whole family kept falling ill over and over again. They returned to the hospital over and over again. Every month they needed medical treatment, and the treatments cost a lot.

More bills, more debt. 

Yun wanted to earn money through his work as a farmer; but he often felt so physically terrible due to sickness that he couldn’t work very much, and he had no other way to earn more money for his family.

Yun standing with his family next to a CWEF biosand water filter

At home, when Yun and his family wanted to cook dinner or wash clothes, they retrieved water from a well. But they knew that the well water was dirty, and they feared what might happen to them if they drank dirty well water. 

So they came up with another idea: collecting rainwater for drinking. The rainwater must be clean, they thought. But still the cycle continued of more illness and less work and more debt. 

Thanks to your generosity, Yun’s family eventually received a biosand water filter through CWEF! Yun watched his family closely in the days and weeks after they began drinking the filtered water, and he happily realized that they came down with sicknesses much less often. He also suddenly discovered that he had more free time.

And on top of that, he had more energy. Enough time and energy to farm and earn more money and, even better, start saving money! Best of all, he received fewer and fewer expensive medical bills. Isn’t it amazing what clean water can do?

Now before he goes out into the fields to farm, Yun brings bottles of water from the the biosand water filter. And he will drink multiple glasses of filtered water before he goes out to the river to catch fish. Yun says, “Now, I am very happy after having received a Biosand Filter from Concordia Welfare & Education Foundation (CWEF) in 2019. All of my family members and I are healthy, and I hope that in the future my family’s living condition will be better.” 

Yun thanks you for your generous donation and for supporting his living situation!   

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Clan John with family members

Down an Impassable Road

John, a farmer from a remote mountain village in Cambodia, along with his wife and children always drank from the village well. Many times a year they would all fall ill with stomach aches and diarrhea as well as frequently experience other health complications like lower back pain and eye problems.

John filling up on clean water from the biosand water filter!

John is descended from an ancient Cambodian ethnic group. Because he lives in the remote mountains, it is very difficult to travel outside of his own village. John attended school until fifth grade and can speak two languages: Khmer and Jarai. In 1998 during the Pol Pot regime, he married his wife in Vietnam near the Khmer border. They had six children together; but sadly, in 2001, one of their daughters died from leukemia.

Now John owns 10 hectares of land where he works hard morning until evening six days a week with his wife to farm cassava and cashews. Despite all of their faithful hard work, for a long time John and his wife could not afford enough food or medical care for their family.

In 2010, a CWEF team – together with a partner organization – visited John’s village. They shared the gospel with John and his family and also taught them how to eat healthy, how to wash their hands with proper technique, and how to boil water in order to make it safe for drinking. After CWEF’s first visit, John began to serve his local church, study the Bible outside of his village, and share the gospel with other people in his own community. Because he speaks both languages, John also assists with translating the Bible from the Khmer language into the Jarai language so that people in his community can better understand God’s Word.

In 2014, a few years after CWEF’s first visit, John requested a biosand water filter from CWEF. Unfortunately, the materials for the filter could not be transported over the terrible village roads. But recently with improved roads, CWEF was finally able to fulfill John’s request and delivered thirty biosand water filters to John’s community! In 2023, with your generous support, we plan to provide clean and safe drinking water via biosand water filters to many more in John’s community and the surrounding area.

John with his children and a few nieces/nephews.

Today John says:

“My community is so blessed by God through receiving Biosand Filters from the CWEF organization. Now we do not spend a lot of time boiling drinking water, and we feel comfortable after we get safe drinking water at home. Thank you CWEF for continuing to work in my community and encouraging us so much in the name of God.”

John and his wife have also now achieved better production on their farm and are able to provide enough food and medical care for their family.

Thank you for your generous support of the HEAL (Health Education, Advocacy, and Literacy) program, facilitate by CWEF! You make it possible for families like John’s to not only hear about the goodness and generosity of God, but also to experience it through clean water, health education, and improved sanitation. Your generosity is transforming lives!

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This story was written by Kanhchana, CWEF Director of Cambodia, and edited by April Chiasson, CWEF Communications Manager. This story was translated into Mandarin by Qian Qian, CWEF Volunteer.

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Project Success Leads to New Work in Tboung Khmum

Since 2011, CWEF has collaborated with local churches and government partners in Cambodia’s Kampong Thom province to improve health through holistic development projects. A pillar of CWEF’s work in Kampong Thom has been the Biosand Water Filter project supported by your generous gifts, which have provided local families with convenient access to clean and safe water in their homes, reducing the impact of water-borne illnesses. Additional work in this area over the past decade has included an Animal Gift project, which has provided sustainable income for 44 low-income families, along with eight new water wells in four villages.

“When a family receives a Biosand Filter, they also participate in health education training related to safe drinking water, how to use the Biosand Filter, and instructions related to installation and maintenance,” shares Kanhchana Thoy, CWEF Cambodia Health Programs Director. CWEF works in partnership with local pastors and village leaders throughout the length of the project, providing these remote communities with life-changing health provisions.

In total, 310 Biosand Water Filters have impacted a total of 2320 people in the Sandan and Chheu Tile communes, serving both families and primary schools. From time to time, the filters need to be renewed and repaired, and this project also restores broken Biosand Filters as needed. We are thankful to share that because your generous gifts, the most acute needs of this remote area have been provided for.


CWEF’s Kanhchana Thoy expresses our gratitude to Pastor Koy Thea in Kampong Thom
Visiting families with Pastor Sareun in Tboung Khmum

Now, our CWEF team in Cambodia is shifting its focus to a new area, again working closely with local church and village leaders. Tboung Khmum province is the location for a newly launched HEAL (“Health Education, Advocacy and Literacy”) project, which includes holistic health education and infrastructure like water wells and Biosand Water Filters.

This community development work will help the “large population of older women, who are taking care of their grandchildren and receiving remittances from their adult children (especially daughters) working in urban areas,” shares Kanhchana. In this area, the average income is between $3 and $4 a day. The health education program, coupled with reliable water wells and Biosand Water Filters, will help “communities live better lives by reducing sickness.”



CWEF anticipates a process of 3-5 years to implement a holistic approach as we equip local health advocates and local families in Tboung Khmum with training and infrastructure.

“This project will have a sustainable impact on many families in Tboung Khmum as we equip them with new knowledge and skills they can use to develop their own communities,” shares Kahnchana.

Thank you! Your support continues to help bring a life-changing renewal of health and hope to families in rural Cambodia.

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Health is Priceless

The rising costs of health care is a common concern in the West. People often take for granted the infrastructures and systems that automatically provide sanitary conditions and safe drinking water. Imagine what life is like for people, without health insurance, who are ill on a regular basis by simply drinking (unsafe) water.

Sambo and his wife, Ku, are 25-year-old farmers in the Sandan District of Kampong Thom Province in Cambodia. With a 7th grade education, Sambo makes a living by working the land on farms owned by others. But frequent diarrhea and abdominal pains not only kept Sambo from working; his chronic illness also incurred many medical bills for treatment. The whole family was ill and needed to borrow money just to cover their daily living expenses. The burden was very heavy on Sambo—how to provide for his family and pay the bills? Plus, all the while, they and their young son were struggling with poor health.

Using water from a well and collecting rainwater met their daily needs for washing clothes, cooking, and drinking. Ku believed that the rainwater was clean and was safe to use. However, the family was actually suffering from water-borne illnesses. In 2019, their lives dramatically improved after they decided to participate in a Biosand Water Filter and health training program facilitated by the local church and made possible by your generous donations to CWEF.

Sambo shares, “I regularly bottle the water from the filter and take it to the fields when I work, and I drink a lot of water before I go fishing on the river. All of my family members and I got healthier, and I hope that in the future my family’s living condition will continue to get better.”

Sambo now has enough time and energy to farm and provide for his family’s expenses. Not only are they healthy now—without abdominal pains and diarrhea—but they no longer need to spend so much money on medical treatments. Sambo and Ku can even begin to save money for their family’s future.

Here’s Sambo’s final word to you:

“Now, I am very happy after getting a Biosand Filter from Concordia Welfare & Education Foundation. Thank you for your donations to support my family’s living situation!”


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Sustained Health and Hope for Sarer

Sarer was a young wife and mother when she was widowed in 1994 in rural Cambodia. Her husband died of malaria, a common malady for farmers in tropical areas. Sarer lives in a multi-generational home with her elderly mother, along with her daughter and son-in-law. She works hard to provide daily necessities for her family.


“As a widow, without a good education, I don’t have any opportunity to work in higher-paying jobs. I work as a farmer, raising chickens, and I grow some veggies,” shares Sarer. “I remember a few years ago, my mom got sick with typhoid and stomach pains, while my daughter’s health was also weak. It required so much money that I took some loans to solve these problems. I thought that sickness is a part of [normal] life … so I didn’t fight to get anything better.”

Through a CWEF Animal Gift project, Sarer’s livelihood started to improve. She received animal husbandry training and five chickens. Her brood of chickens now numbers around 80! With the money from her chicken business, Sarer purchased a rice mill machine. She sells organic rice and uses the rice bran to feed her animals.



Later, CWEF introduced health training and made biosand water filters available to Sarer’s village. “I learned more about the bad effects of using unclean water.” She discovered that the cause of many diseases that her family and neighboring villagers experienced were from unclean water, such as abdominal pain, typhoid fever, and diarrhea. Sarer was very interested in using a biosand water filter. “I thought that I need to protect myself and take care my family from now on.”

Sarer’s health improved dramatically once she received a biosand water filter in 2018. She no longer needs to search for firewood needed to boil and purify her drinking water. “I trust the biosand filter!” she shares. “I use the water for cooking, drinking, and showering. I am now healthier than in the past. I have more strength to work and take care of my family.”

CWEF’s vision is a “world of thriving communities, serving and inspiring hope in others.” Through CWEF projects, Sarer and her family are now thriving. In her own words, she reflects:

“My life is better than five to six years ago. Thank you so much for bringing the development projects – both Animal Gift and Biosand Filter projects – to my community.”



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