Out of all the fully developed industrial parks in Taiwan, which amounts to over 100 in total, 51 of them have waste water treatment plants (WWTPs) set up, and these plants are managed separately by National Science Council of Executive Yuan, Industrial Development Bureau of Ministry of Economic Affairs, or relevant municipal governments. Based upon the reported fundamental information form individual WWTPs, this year’s “Industrial Parks’ Designated Underground Drainage System Investigation Evaluation Assessment and Management Problem Diagnosis Follow-up Improvement Program” has sorted 40 thousand records in the water pollution database of Environmental Protection Administration. Besides collecting the baseline conditions of these WWTPs, the research team has conducted standard deviation analyses for the original performance indicators and their derived indicators including piping rate, BOD reduction rate, COD reduction rate, SS reduction rate, and effluent water quality. Moreover, in conjugation with sampling points from 50 WWTP effluents and 117 rain water culverts, result detection was conducted in order to integrate basic evaluation information. Telephone and electronic surveys were also implemented to follow up on defect improvement items in 2004. Incorporating the most complete fundamental information from improvement follow-ups of over 500 defect items on the 50 questionnaires, the 2006 evaluation assessment is then able to proceed as planned. In respect of the rain water culverts, the evaluation assessment results show that the unacceptable rate of the 2006 rain water culvert check is 24.7%, which is a great improvement from the 34.5% in 2005. In order to eliminate detoured discharges and illegal dumping, relevant investigation and patrol need to be emphasized and enforced. In regards to piping manufacturers, the current piping rate in each of the industrial parks is between 100% and 85.2%. Some pre-treatment manufacturers of the industrial parks are still not properly operating, or having insufficient facility operation efficiency that results in more severe waste water issues. Relevant authorities should insist on its enforcement. From the beginning of the execution of this program up to now, the WWTP pollution control has had apparent outcomes. For instance, charge/impeachment rate has increased form 2.4% in 2005 to 3.5% due to increased investigation while petition rate has declined from 25.2% to 16.4%. These statistics show that through the enforcement of investigation and patrol by the administrative system, illegal situations have progressively come under regulation control, and petitions from the general public against water pollution in industrial parks have gradually become reflections of subjective experience rather than that of actual pollution issue. Particularly among the achievements of pollution reduction, improvements in Hsinchu Industrial Park Service Center have been the most apparent. Therefore, implementation of this program is certainly beneficial to pollution reduction, though some improvements can not be accomplished overnight; and the Environment Protection Administration should progressively put into practice the relevant control management in the long term in connection with related issues compiled through the evaluation assessment.

wastewater treatment plants；wastewater sewage system；industrial evaluation