Abstract
Recently, ODA evaluation is recognized as important and necessary for securing accountability and improving the quality of ODA. This study is aimed at proposing an evaluation method for ODA projects in the water supply sector in terms of water quality. Achievement Grade (AG) and Risk Level of contamination were proposed for indicators of evaluating impact as potability. To demonstrate the evaluation results, field surveys were conducted in Nepal, Philippines, Vietnam and Indonesia. In addition to water quality analysis, the following surveys were conducted for multiple understanding of the actual situation: interview with those concerned with the projects, facility study and questionnaire survey to the beneficiaries.
