The adoption rate of municipal water systems in Kenya has been a subject of interest due to its potential impact on public health and economic development. The methodology involves the application of a fixed-effects model to analyse the impact of socio-economic factors on the adoption rate of municipal water systems across different regions in Kenya. Panel data from eight major cities are utilised for this analysis. A significant proportion (72%) of households reported adopting municipal water systems, with urban areas showing higher adoption rates compared to rural areas. The fixed-effects model provided robust estimates of the factors influencing the adoption rate, offering valuable insights into policy-making and resource allocation for future development initiatives. Policy-makers are encouraged to consider the identified socio-economic determinants when planning municipal water system expansion in Kenya. The empirical specification follows $Y=\beta_0+\beta^\top X+\varepsilon$, and inference is reported with uncertainty-aware statistical criteria.