Like in many developing countries, over 70 percent of the population in Nepal rely on Non Sewered Sanitation (NSS) services such as pit latrines and septic tanks (Source: Central Bureau of Statistics (2011), Government of Nepal). As the number of municipalities has now increased to 293 (2017) from 58 (2014) with many of the small and emerging towns also being classified as municipalities, the percentage of households connected to septic tanks has further increased.