Abstract: This research used the LMDI method to decompose the influencing factors of domestic water consumption changes into domestic water consumption intensity, the proportion of consumption in GDP, per capita GDP, household size and the number of households, and decompose the change in per capita domestic water consumption into domestic water consumption intensity and consumption in GDP Proportion and GDP per capita. It was found that domestic water consumption intensity and household size were the main and secondary factors inhibiting the increase of domestic water consumption. Per capita GDP and the number of households were the main and secondary factors that promotd the increase in domestic water consumption. The reduction and growth effected of the proportion of consumption in GDP simultaneously exist. Domestic consumption water intensity, per capita GDP, and the proportion of consumption in GDP had the same impact on per capita domestic water consumption as that of domestic water consumption. Therefore, it is necessary to implement high-quality development, form a water-saving lifestyle, improve water use efficiency,develop and implement life water-saving policies around family development,enhance the awareness of water saving, and establish an advanced quota system for domestic water.

Key words: domestic water use, household size, household number