Lawrence K Wang 王 抗 曝, Mu-Hao Sung Wang, 宋 慕 浩, Chandler CJ Bien卞 全 忠, Stephen Wu 胡 啟 焕, and Lim Eng Wah 林 永 华 (2023).Treating Unpredictable Potable Water Source With Green Technologies of Aluminum Chlorohydrate (ACH), Streaming Current Monitor SCM), And Dissolved Air Flotation (DAF) . 用 绿 科 技 新 药 ACH, 新 儀 控 SCM, 及 気 浮 水 廠 DAF, 処 理 多 变 性 自 来 水 源. In: “Environmental Science, Technology, Engineering, and Mathematics (STEM)”, Lawrence K. Wang, Mu-Hao Sung Wang, and Yuriy I. Pankivskyi (Editors). 2023 (3B), March 2023; 38 pages. https://doi.org/10.17613/a6x9-qs09 , Lenox Institute Press, MA, USA.  …….. ABSTRACT: Aluminum chlorohydrate (ACH) is a green coagulant highly effective for water treatment especially when the influent water quality is unpredictable, and normally the raw water source is unusable. Stream current monitor (SCM) is a green automatic chemical dosage monitor and controller which is highly useful for treating a trouble water which constantly changes its quality. Dissolved air flotation (DAF) is a green water treatment technology which achieves high effluent quality but cuts detention time (DT), O&M costs all by about 25%. This technical paper (1) introduces the use of 3 green technologies of ACH, SCM and DAF for treating unpredictable water, in turn, for saving raw water resources, O&M costs and improving water quality; and (2) recommends further research & developments of these combined green technologies around the world. Researchers are encouraged to study further and share each other’s research findings. 同时用新药ACH,新儀控SCM 及気浮水廠 (DAF) 可以処理原先無用的多变性水源, 减少25%处理时间(DT), 节省造价及化学药品, 並且大大提高自来水的品质. 所以ACH, SCM 及 DAF 是绿色科技. 本文為作者回憶錄之一, 用以介绍此三种绿色科技的原理及同時應用三者的高效果. 此外也 歡迎共同研究,或商業發展.