Between 2017 and 2022, marginalized communities, as well as Brahmin and Chhetri communities, witnessed a significant increase in the prevalence of access to appropriate drinking water treatment. However, the rate of improvement was higher among the Brahmin and Chhetri communities, showing a remarkable 20 percentage point increase compared to the marginalized communities, which had a 15 percentage point increase. Consequently, the gaps between these two groups have widened.

All three agro-ecological zones have shown significant progress in increasing the prevalence of appropriate treatment of drinking water in households. The hill region exhibited the most substantial improvement, with a remarkable 21 percentage point increase, while the terai region had the lowest improvement at 9 percentage points. Moreover, the mountain region experienced a higher rate of increase compared to the terai region.