The Health Impact of Water Filtration
In the year 2006, the Cochrane Collaboration published a systematic review of 38 randomised, controlled trials of various water quality interventions to prevent diarrhoea titled, “Interventions to Improve Water Quality for Preventing Diarrhoea.” These trials covered more than 53,000 subjects from 19 countries over 20 years.
The objective of this review was to assess the effectiveness of interventions to improve water quality for preventing diarrhoea. This review, which covered both point-of-source and point-of-use household-level interventions, found that household interventions were twice as effective in preventing diarrhoea as common source-based interventions (wells, boreholes and communal tap stands).
Among household interventions, filters were consistently the most effective in preventing diarrhoea, with an average 63% reduction.
Filtration vs. other Point-of-Use Interventions1
|Intervention Type (no. of trials)||% Reduction (1-RR) in Diarrhoea||95% Confidence Interval of Estimate*|
|Filtration (6)||63%||0.28 to 0.49|
|Chlorination (16)||37%||0.52 to 0.75|
|Solar Disinfection (2)||31%||0.63 to 0.74|
|Flocculation/Disinfection (7)||52%||0.20 to 1.16|
|Flocculation/Disinfection (ex Doocy)||31%||0.58 to 0.82|
|Improved storage (1)||21%||0.61 to 1.03|
*Estimates outside this range have a likelihood of less than 5%
Of the household level interventions, filtration is the most effective in preventing diarrhoea.
1. Clasen T. et al. 2006. Interventions to improve water quality for preventing diarrhea (A Cochrane Review). The Cochrane Library (3). Oxford: Update Software
Search Vestergaard Frandsen
Buy LifeStraw® in US and Canada
LifeStraw is now available for sale from reputable retailers in the US and Canada for individual customers: http://eartheasy.com/lifestraw-store-locations
LifeStraw® Carbon For Water
More than four million people in Western Province, Kenya now have access to safe and clean drinking water purified up to EPA standards through the LifeStraw® Family. This $30 million public health program, which will last ten years, will be funded by carbon offsets. Learn more at www.carbonforwater.com
See the program in action in award-winning documentary at www.carbonforwaterfilm.com
Like Us on Facebook
Subscribe to News Updates
All LifeStraw® Downloads
Coca-Cola Denmark, Vestergaard Frandsen and nonprofit Water For All distribute 27,000 LifeStraw® to Kenyan community, students, and educators. Read more.