Household Water Treatment System Chlorine Doser

Organisation: MSR Global Health

Location: Seattle, WA USA. Field testing sites TBC

Type of grant: WASH

Status: Ongoing

  • MSR Global Health Keeps a Focal Point on Needs of Families

  • MSR Global Health's Water Research Lab in Seattle, WA

  • MSR's Award-Winning MiniWorks Ceramic Water Filter

  • MSR's Microbiology Lab

  • Open Source Concept Improves Choices for Families

  • MSR Household Water Treatment System Prototype

  • The capsule housing the chlorine tablet is engineered with an automatic shutoff feature, altering the user that the tablet needs to be replaced.


MSR Global Health is developing a low cost single-pass household water treatment system (HWTS) incorporating a hardy, fast-flowing, cleanable ceramic membrane and large capacity treatment media to achieve reduction of protozoa, bacteria, and virus while providing residual protection.

What is the humaniarian need?

Diarrheal disease is still the second leading cause of death in children under five, killing 525,000 each year. Globally there are more than 1.7 billion cases of childhood diarrheal annually (WHO). A significant portion of these can be prevented through safe-drinking water however, access to safe drinking water continues to be limited. Often, available treatment options are not effective against all causative agents, too expensive, too low capacity, or not suitable for all environments. For this reason, there is a need to improve on HWTS options.

What is the innovative solution?

The successful development would provide a complete drinking water treatment system for end users at a household scale. The design is intuitive and simple, removing challenges associated with training, language barriers, and improper use/set-up. With technology capable of addressing helminths, protozoa, bacteria, and virus, it will have a significant impact on diarrheal disease from any water source. A household purifier capable of treating up to 10,000 L of drinking water without any resupply will also reduce burdens on both end users and humanitarian agencies. In addition to this, the disinfection cartridge will add a small residual to protect against recontamination.

What are the expected outcomes?

Upon completion of this project, it is anticipated that multiple iterations of the design will have been completed, tested, and reviewed from perspectives of both end users and manufacturing engineers. At each stage of iteration, the design will be evaluated against the key performance indicators of cost, usability, performance, and manufacturability. This will position the HWTS device in a beta stage of development, which would allow MSR Global Health to pursue additional funding for larger scale field-testing, and user evaluations before beginning initial production. Any learnings from this effort will be shared with the greater community to further aid in progress towards bringing sustainable access to safe drinking water to the world.


Elrha is a registered charity in England and Wales (1177110).

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