In this study, sustainable utilization plans were proposed by reviewing the current status and problems of water infrastructure, focusing on water supply and sewage system in Chungcheongnam-do. Due to the regional characteristics of the rural areas in Chungcheongnam-do which has a very low urbanization rate, there is a difference in the level of water welfare services between local governments. Compared to other governments, there are relatively many small water facilities, resulting in a service imbalance in terms of tap water safety. In addition, Chungcheongnam-do has a structure that is very vulnerable to water security to cope with climate change and drought due to its high dependence on wide-area water supply. Therefore, it should be considered in consideration of population reduction and local extinction due to low birth rate and aging population. Rural areas should clearly establish marginal areas for the supply of water and sewage, and implement regional customized water and sewage projects in consideration of local extinction. Water supply projects should be implemented in a distributed water supply method using various water sources. In order to respond to climate change and establish water security, a distributed water supply system should be established through a multi-source water loop system using various water sources. Sewage projects should be establish public sewage treatment facilities in consideration of the priorities of each local government, focusing on local governments with low sewage treatment population rates. In consideration of regional characteristics, it is necessary to consider the installation of private sewage treatment facilities or nature-friendly treatment facilities such as soil infiltration and artificial wetlands. An integrated management system using Internet of Things(IOT) or Information and Communications Technology(ICT) should be established and operated to improve the operation and management efficiency of small-scale water supply and sewage facilities.

The results of the survey on water utilization status, the wasted water factor, the awareness, and the education and promotional activities of water saving in Daejeon City are as follows: The percentage of using tap valve with a closure was 66% when showering. 74% of water was used with closing the tap valve when washing faces with no water needed, it was still considered that there existed a wasting water. The most wasting reasons of water were found to be shower, bath, and laundry in order. In the awareness of practicing tap water saving, 9.1% of respondents acted actively, 53.4% of them were trying to practice it, and more than 63% had a positive awareness. In the contents of practicing saving water, locking water when soaping while showering, non-laundry of small quantity, and using cups when brushing teeth were top priorities. About 50% of the reasons for saving water was to practice purely saving water, when saving for economic help was excluded. The level of water saving awareness was not high when considering that the ratio of usage without water saving equipment and installation, and using method was relatively high when moving in. In order to make usage of water saving equipment more common, it was deemed necessary to provide information on the purchase of water saving equipment and to promote and educate the efficiency of saving of related products. More than about 90% of the respondents responded that water saving education or promotional activities had an effect of improving water saving awareness. The most effective method of education and promotional activities was found to be 40.4% by mass media activities, and 21.7% by promotions through mobile devices.