Evaluation of the Impact of the Plastic BioSand Filter

A randomized controlled trial of the plastic BioSand filter (BSF) was performed
in rural communities in Tamale (Ghana) to assess reductions in diarrheal disease and
improvements in household drinking water quality. Few studies of household water filters
have been performed in this region, where high drinking water turbidity can be a challenge
for other household water treatment technologies. During the study, the longitudinal
prevalence ratio for diarrhea comparing households that received the plastic BSF to
households that did not receive it was 0.40 (95% confidence interval: 0.05, 0.80),
suggesting an overall diarrheal disease reduction of 60%. The plastic BSF achieved a
geometric mean reduction of 97% and 67% for E. coli and turbidity, respectively.
These results suggest the plastic BSF significantly improved drinking water quality and
reduced diarrheal disease during the short trial in rural Tamale, Ghana. The results are
similar to other trials of household drinking water treatment technologies.

Evaluation of the Impact of the Plastic BioSand Filter on Health and Drinking Water Quality in Rural Tamale, Ghana. C. E. Stauber, B. Kominek, K. R. Liang, M. K. Osman, M. D. Sobsey. 2012. International Journal of Environmental Research and Public Health 9:11, pp. 3806–3823. doi.org/10.3390/ijerph9113806