@article{oai:nies.repo.nii.ac.jp:02000006, author = {Masahiro, Oguchi and Shin, Okubo and Noboru, Tanikawa and Satoshi, Nakamura}, journal = {環境科学会誌}, month = {May}, note = {This paper discussed the reliability of the reported release and transfer of chemical substances under the Japanese Pollutant Release and Transfer Register (PRTR) in terms of the estimation techniques.Our questionnaire surveys to PRTR-reporting facilities revealed the following. The reported releases/transfer to public water bodies, soil, on-site landfill, and sewage treatment were reported as zero in most cases due to that no releases/transfers were expected at the facilities. Regarding the release to air and the transfer to waste treatment, in half the cases where the reported data estimated based on mass balance (10% of the total reported data), the releases/transfers occupy less than 0.01 of the production/use amounts, suggesting that these data may deviate from the actual amount by one order of magnitude. Half of the reported data estimated using direct monitoring (5% of the total reported data) were not sufficiently reliable because they were based on annual or biannual measurements, even though the emission concentration variations were unknown. Approximately 30-40% of the reported data estimated using emission factors (10% of the total reported data) were based on the factors from literature or unknown sources. The reliability of these releases/transfers depends on the applicability of the factor to individual facility., This is the authors’ provisional translation of the following Japanese original article published in Environmental Science (Kankyo-kagaku-kai-shi) by the Society of Environmental Science, Japan Oguchi, M., Okubo, S., Tanikawa, N., Nakamura, S., 2022.Environmental Science (Kankyo-kagaku-kai-shi), 35(4): 189–198. doi of the Japanese original article: 10.11353/sesj.35.189}, pages = {1--21}, title = {Reliability of the Pollutant Release and Transfer Register Data in Terms of the Employed Estimation Techniques}, year = {2023} }