Water and Sanitation

What evidence do we have in the effectiveness of WASH programmes?

Globally, more people have access to clean water, sanitation and hygiene than ever before, but we are a long way away from delivering universal access. We really need to know what works and what does not, for whom, why and at what cost. 

Check out our latest resources and evidence from our recent high quality systematic reviews that focus on water, sanitation and hygiene (WASH) interventions, including the findings from latest mixed method systematic review of hygiene and sanitation behaviour change programme. Our systematic reviews provide information about both the reliability of the existing evidence and the magnitude of changes in different contexts to provide actionable policy recommendations to decision makers and the public.

Evidence on WASH programmes

Snapshot of 3ie’s work in the WASH sector

Hugh Waddington, senior evaluation specialist at 3ie, provides an overview of the state of evidence in the WASH sector. Watch this short video to understand what evidence exists, where are the important gaps and how 3ie in partnership with other organisations is working to make a meaningful contribution to evaluation and evidence in the WASH sector.



Promoting handwashing and sanitation behaviour change in low-and middle-income countries

3ie, in collaboration with the Water Supply & Sanitation Collaborative Council (WSSCC) produced a mixed method systematic review of hygiene and sanitation behaviour change programming. The Promoting handwashing and sanitation behaviour change in low-and middle-income countries review shows which promotion approaches are effective in changing behaviour and which implementation factors affect the success or failure of such interventions.

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