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Document

What is the evidence that HWTS is effective?

This white paper summarizes the evidence on the effectiveness of household water treatment and safe storage (HWTS). It compiles findings from systematic reviews, meta-analyses, randomized controlled trials, and global monitoring data to examine the impact of HWTS on diarrhoeal disease, drinking water quality, and child stunting.

The document highlights how different HWTS technologies—such as filtration, chlorination, and solar disinfection—contribute to reducing health risks, and compares their effectiveness with other WASH interventions. It also explores the gap between laboratory performance and real-world use, emphasizing the importance of correct and consistent use, safe storage, and prevention of recontamination.

This resource is intended for practitioners, researchers, and decision-makers seeking an evidence-based overview of HWTS and its role in improving drinking water safety within broader WASH programs.

  • Language:

    English

  • Format:

    Adobe PDF

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About CAWST

CAWST is a Canadian charity and licensed engineering firm. We address the global need for safe drinking water and sanitation by building local knowledge and skills on household solutions people can implement themselves.