The Royal Kingdom of Cambodia is located in Southeast Asia between latitudes of 10-15°N and longitudes of 102-108°E. The country is composed of one capital city and 24 provinces, with a population density of 82 per km2 (MoP, 2013). In 2015, there were 15.48 million population or 3.06 million households (Provincial Department of Planning, 2016). Cambodia has drastically developed in the last two decades and experienced a fast-growing economy. At average gross domestic product (GDP) growth rate of 7.7%, the country has successfully transformed from a low-income country to a lower-middle-income country as classified by the World Bank in 2015 (World Bank, 2018). However, various environmental issues have occurred alongside economic development, and one of them is solid wast