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.
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.
Read the summary | Read the brief
This systematic review summary by Hulland et al. reviews the evidence on factors that motivate sustained adoption of WASH technologies.
Willingness to pay for cleaner water in less developed countries: systematic review of experimental evidence
Clair Null et al. examines studies that have used randomized approaches or even attempted to measure households' willingness to pay for cleaner water.
This brief distills findings from an impact evaluation on what works in expanding the adoption of chlorine dispensers in Kenya.
This brief highlights findings from an impact evaluation to see if latrine coverage reduced exposure to disease.
This brief distills the main findings from a 3ie-supported impact evaluation on what works in promoting safe water and handwashing.