Journal
AMERICAN JOURNAL OF TROPICAL MEDICINE AND HYGIENE
Volume 85, Issue 2, Pages 309-317Publisher
AMER SOC TROP MED & HYGIENE
DOI: 10.4269/ajtmh.2011.09-0122
Keywords
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Funding
- American people through the US Agency for International Development (USAID)
- Bonao Rotary Club
- Canadian Embassy of the Dominican Republic
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The biosand filter (BSF) is a promising point of use (POU) technology for water treatment; however there has been little follow-up of initial implementation to assess sustainability. The purpose of this study was to examine continued use, performance, and sustainability of previously implemented concrete BSFs in Bonao, Dominican Republic. Of 328 households visited and interviewed, 90% of BSFs were still in use after approximately 1 year since installation. Water-quality improvement, measured by fecal indicator bacteria reduction, was found to be 84-88%, which is lower than reductions in controlled laboratory studies but similar to other field assessments. In a short prospective cohort study comparing BSF to non-BSF households, odds of reported diarrheal disease in BSF households were 0.39 times the odds of reported diarrheal disease in non-BSF households. These results document high levels of sustained and effective concrete BSF use and associated improvements in water quality and health.
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