Across Uganda, approximately 25% of the population still lacks access to clean, safe drinking-water . This means that every day, around 9 million people are risking their lives and health by drinking from contaminated water sources. Bio-sand water filters (BSFs) provide a cheap and simple solution and can have dramatic health, economic and social benefits. By passing water through layers of sand and sediment, they are able to remove up to 100% of worms and protozoa, up to 98.5% of bacteria and 70-99% of viruses.
Previous BSF recipients report a reduction in infectious diseases such as cholera, dysentery and diarrhea, fewer work days lost due to illness and caring for the sick, and less time lost in fetching and boiling water. Many previously spent an hour each day on boiling their water (15 days per year), which they can now use more productively on other activities. Mothers have also noticed a positive impact in the area of education – children learn better when they go to school properly hydrated.
Each filter serves approximately five households of five people each . One BSF therefore provides clean water for around 25 people per day and saves the community an estimated $870 in charcoal costs and medical fees. Women with access to a BSF estimated that the reduced need to boil water saved them half a bag of charcoal per month, the equivalent of saving 15 trees per year from being cut down for charcoal production.
A Rocha Uganda has been implementing the bio-sand water filter program since 2008, in both urban and rural communities. Every BSF is carefully monitored on an annual basis, to gather feedback and ensure that they are being correctly used and maintained. World Health Organization, 2011.Water, sanitation and hygiene: Exposure by country [online] [Accessed 26/7/13].
 Uganda National Household Survey Findings 2012/2013