Main Article Content
The growing of economics, social and population, the objective of the study is to analyze the investment in term of monetary value and period for waterworks construction in provincial area. This research is based on the case study of the Provincial waterworks authority (PWA). The methodology is to analyze the demand forecast compared with the maximum exiting capacity of provincial waterworks authority. Investment should be concerned in case of exceed demand to reach the usage in the future. As a result, in the period of 2012-2032 the waterworks systems in 206 branches of provincial waterworks authority should be invested to support the increasing demand which is the total amount of 102,706 million baht. The highest investment will be 17,834, 14,082, and 13,930 million baht per year in 2013, 2014, and 2012, respectively.