The purpose of this project was to determine the quality of a total of twenty-four water sources samples for the packaged and containerized drinking water in the administrative areas of Yeelan County, Hsinchu County, Miaoli County, Changhua County, Nantou County, Yunlin County, Kaohsiung County, Pingtung County, Taitung County, Hualien County, and Kinmen County. The respective governing agencies use the data collected from the inspection to verify if the water quality meets the drinking water regulations. All samples analyzed in this project were collected by the respective local Environmental Protection Bureaus according to a preset schedule. Samples were either delivered by the sampling crew or shipped to the Cenpro Technology Corporation. The analytical results indicated that all quality control analyses of the target analytes met the quality assurance criteria of the project. The scheduled and non-scheduled performance evaluation sample analysis results were all within the acceptable limits as well. The quality assurance of sample analysis data of this project was made more significant by the above measures, where the analyses were performed. Forty-two analytes in the water quality standards for drinking water sources were analyzed. The analytical results indicated that in the twenty-four samples, all samples met the water quality standards for drinking water sources.