Water treatment facilities in Nigeria face challenges related to cost-effectiveness due to varying environmental conditions and technological advancements. A quasi-experimental design was employed, utilising statistical models for analysis. Uncertainty in findings is considered within a 95% confidence interval. The methodological assessment revealed significant variation in cost-effectiveness metrics across different regions of Nigeria. Quasi-experimental design provided valuable insights into the variability of water treatment facility costs and effectiveness in Nigerian settings. Further research should explore regional-specific factors influencing cost-effectiveness to inform policy decisions. Water Treatment Facilities, Quasi-Experimental Design, Cost-Effectiveness, Nigeria The maintenance outcome was modelled as Y₈ₓ=₀+₁X₈ₓ+uᵢ+₈ₓ, with robustness checked using heteroskedasticity-consistent errors.
Anyadike et al. (Sat,) studied this question.