Bio-Sand Filters

Return to Sustainable Resources

A Single Drop for Safe Water


Centre for Affordable Water & Sanitation Technology

Centre for Affordable Water & Sanitation Technology FAQ

International Aid HydrAid


Life Water International

Manz Water Information


Thirst Relief International

Turn on the Tap (Samaritan’s Purse Canada)

Turn on the Tap (Samaritan’s Purse UK)

WHO Water Sanitation & Health

World Water Development Report



The mission of A Single Drop is to seek and offer simple creative solutions to promote social action specifically around water issues and encourage environmental water stewardship to cultivate peace and equality.

Go to Top presents facts and information offering comprehensive and informative web resource on this technology, including updates on academic research. They encourage sharing experiences of the filter through a discussion group that provides an environment where practitioners can meet colleagues implementing similar projects in other countries; where field staff have the opportunity to consult experts; and where policy makers can meet those wanting to ensure safe drinking water for their own family.

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CAWST, the Centre for Affordable Water and Sanitation Technology, is a Canadian humanitarian not-for-profit organization providing education, training and technical consulting in water and sanitation to organizations working with the poor in developing countries. To date, CAWST has provided services in 53 countries, and has catalyzed a network of 135 organizations implementing independent water programs that have impacted 1,625,000 people with improved water. CAWST also actively engages youth and communities to get involved in the cause, encouraging grassroots actions to conserve water and raise awareness locally and globally.

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This page is the CAWST Biosand Filter FAQ.

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International Aid’s eight-pound, HydrAid filter dramatically reduces the leading causes of death and disease in the developing world. HydrAid removes 100 percent of parasites and up to 90 percent of bacteria and viruses from contaminated drinking water. The lightweight plastic HydrAid filter is designed to be easily transported in rough and remote terrain without risk of breaking. It is a non-electric device with no moving or replacement parts and can provide clean, safe water at the rapid rate of 47 liters per hour—meeting all of a family’s water needs including drinking, bathing and washing clothes. International Aid’s HydrAid filter incorporates proven Bio-Sand technology currently in use in more than 200,000 concrete filtration systems in more than 70 countries worldwide.

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The web site is a clearinghouse for low-cost water security technologies for developing countries. This page focuses on bio-sand filters, providing information on descriptions, performance, benefits and drawbacks, costs, and other details.

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Compelled by God’s call and the global water and sanitation crisis, Lifewater International equips partner organizations and works with them to empower communities in developing countries to gain safe water, adequate sanitation, effective hygiene, and the knowledge of Jesus’ love. This page focuses on their bio-sand filter program.

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The objective of this web site, by the founder of the bio-sand filter (BSF), is to provide as much useful guidance as possible to all of the organizations and individuals involved with or interested in implementing BSF projects, using the BSF technology, evaluating BSF technology and its implementation, research and development of the BSF technology (at least as it pertains to humanitarian applications), funding BSF activities, regulatory bodies concerned with certifying BSF technology and any other activity pertaining to the successful use of the BSF technology worldwide.

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This link on the Tearfund web site provides information on bio-sand filters which purify dirty water so that it becomes safe to drink. They are very useful, both in rural and urban areas which lack safe piped water.

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Thirst Relief International is a water development organization working to improve access to safe water in seven countries worldwide. Thirst Relief works with its implementing partners to launch and sustain water projects in impoverished rural areas and urban slum communities. By providing infrastructure development, training, and financial and technical resources to our partners, they are helping thousands of people each year improve their health through safe drinking water.

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Through Samaritan’s Purse Bio-Sand Water Filter projects, they are providing communities access to safe drinking water through household Bio-Sand water filters. Since 1998, their teams and local partners have installed more than 95,000 filters in homes, communities, schools, and clinics, bringing improved water to an estimated 760,000 individuals worldwide. Recipients of the filters are trained in how to use and maintain the filters, as well as basic health and hygiene practices.

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Samaritan’s Purse got their water and sanitation work underway in 2005 after identifying some of the places in the world where the need is greatest and where there were local partners—churches or charities—who shared their passion. Since then, they’ve gone on to provide access to safe water and sanitation for over 140,000 individuals in communities across Ethiopia, Liberia, Niger, Mozambique and Uganda.

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At the end of the International Drinking Water Supply and Sanitation Decade (1981-1990), WHO and UNICEF established a Joint Monitoring Program for Water Supply and Sanitation (JMP). The overall aim of the JMP is to report globally on the status of water supply and sanitation sector, and to support countries in improving their monitoring performance to enable better planning and management at the country level.

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This article is entitled The 2nd UN World Water Development Report: ‘Water, a shared responsibility’ and is provided by the United Nations Conference on Environment and Development.

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CompassionLink is a ministry of Assemblies of God World Missions

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