Water and Sanitation

Global Handwashing Day: Evidence from WASH policies and programmes

On Global Handwashing Day (15 October), we recommend reading some of our latest studies and research from our high-quality systematic reviews that focus on water, sanitation and hygiene (WASH) interventions.

Evidence on WASH programmes

Water, Sanitation and Hygiene Evidence Gap Map 

This evidence gap map systematically maps the evidence on the effects of WASH interventions in low- and middle-income countries.

View map online


Using a life-cycle approach to target WASH policies and programmes

Our new brief is based on a systematic review on incorporating the life-cycle approach into WASH programmes and policies. This review analyses dominant approaches to targeting populations, the barriers to access and strategies to improve access to WASH services.


Download brief
Download systematic review

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

3ie supported a mixed-method systematic review that examined hygiene and sanitation behaviour change programming. The promoting handwashing and sanitation behaviour change in low- and middle-income countries review shows which promotional approaches are effective in changing behaviour and which implementation factors affect the success or failure of such interventions. Our brief summarises the main findings and recommendations of the review.

Download summary
Download brief


Related publications


Systematic reviews

Impact evaluations


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

Photo © Eddy Mbuyi/ Oxfam

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