Comparative Field Trial of Water Treatment Systems in Ghana: Methodological Evaluation and Adoption Metrics (2000–2026)

"background": "Universal access to potable water remains a critical challenge in sub-Saharan Africa. While numerous water treatment technologies have been deployed, systematic comparative data on long-term adoption and performance under real-world conditions is scarce, hindering evidence-based policy and engineering design. ", "purpose and objectives": "This study aimed to methodologically evaluate and compare the sustained adoption rates and operational efficacy of three prevalent community-scale water treatment systems—biosand filters, ceramic pot filters, and chlorination dispensers—through a longitudinal randomised field trial. ", "methodology": "A cluster-randomised controlled trial was implemented across 120 rural communities. Adoption was modelled using a mixed-effects logistic regression: \ (p{ij) = \0 + \1 Tij + \2 Xij + uj, where pij is the probability of adoption for household i in cluster j, Tij represents treatment technology, Xij a vector of household covariates, and uⱼ a cluster random effect. Primary metrics included verified usage rates and functional status, assessed via quarterly surveys and technical audits. ", "findings": "Ceramic pot filters demonstrated a significantly higher sustained adoption rate (68%, 95% CI 62, 74) compared to biosand filters (52%, CI 46, 58) and chlorination (41%, CI 35, 47). The odds ratio for adoption of ceramic filters versus chlorination was 3. 05 (p<0. 001). Key determinants of adoption included maintenance accessibility and perceived taste improvement. ", "conclusion": "The choice of water treatment technology significantly influences long-term community adoption, with household-level ceramic filters showing superior sustained uptake under the trial conditions. Technological reliability and user experience are as critical as initial efficacy. ", "recommendations": "Engineering design and implementation policy should prioritise technologies with low recurrent maintenance burdens and positive user sensory feedback. Programmes should integrate robust, longitudinal adoption