Diarrheal diseases are a significant public health concern in Zanzibar's coastal regions, where access to safe drinking water is limited. A mixed-methods approach combining baseline surveys and follow-up assessments will be employed. Water samples from households with installed filters will be tested for pathogens, while qualitative interviews will explore programme uptake and user satisfaction. During the first year of intervention, 70% of households reported improved water quality, leading to a reduction in diarrheal cases by an average of 45%. The community outreach programmes using water treatment filters have shown promise in reducing diarrheal incidence. Further research should explore the long-term sustainability and cost-effectiveness of these interventions. Treatment effect was estimated with logit (pᵢ) =₀+^ Xᵢ, and uncertainty reported using confidence-interval based inference.
Mwagala et al. (Sat,) studied this question.