The net costs and GWP for all four technology during a 1-year adoption period (Figures ) were used to normalize results to their respective median from different adoption periods (Figures ). For POU chlorination, all values were lower with longer-term adoption. In the case of short-term adoption (1 year), the POU chlorination system had a median net cost of 0.42 USD•cap -1 •yr -1 and median net GWP of 0.62 kg CO2 eq•cap -1 •yr -1 . However, for long-term adoption (15 years) the net cost decreased to 9.31% of the 1-year adoption cost. On the other hand, the GWP for 15 years decreased to 6.67% of the 1-year adoption scenario. These reductions in cost and GWP with longer adoption periods are due to the distribution of capital requirements associated with the 20 L jerry can over the extended lifetime of the system. It does appear that both indicators level out at higher adoption periods, which can be attributed to the continuous need for consumables (i.e., NaClO) to run the system. The AgNP CWF system exhibited the lowest GWP and the second lowest costs compared to all other technologies across the entire range of adoption lengths (Figure ). Specifically, for a 1-year adoption term, the estimated net cost was 3.31 USD•cap -1 •yr -1 and the net GWP was 0.33 kg CO2 eq•cap -1 •yr -1 . Both the net cost and GWP significantly decreased as the adoption period increased from 1 to 5 years. At a 15 years adoption term, the estimated net cost and GWP were 9.31% and 7.92% of the 1-year adoption, respectively (Figures ). Therefore, for both short-term and long-term adoption, the AgNP CWF system appears to be a viable option. This system has the potential to be the most sustainable choice, considering both cost and environmental impacts.