Up to present, there are disadvantages that are high installation cost and high spatial occupation of the common used water quality monitor instruments. Hence, these are not suitable for widespread installation. Recently, based on the improvement of the technology on on-line water sampling and quality analysis, as well as the big data and wireless transmission technology, developing a durable, small volume-occupied, easy-operation and low cost water quality monitor IoT interactive information system becomes a possible route. The achievements in this project are as follows, 1) completed the development of the miniaturized water quality monitor element using optical and electrochemical technologies for heavy metal, chemical oxygen demand, suspension solid, pH, conductivity and temperature monitoring and accomplished the verification of monitoring element for real wastewater detection as well as the corresponding system of Quality Assurance, Quality Inspection and Quality Control; 2) finished the miniaturized water quality monitoring system prototype design, including pretreatment module, communication module and water quality sensing module, and also completed five repeating tests of standard and three real wastewater samples from different application scenarios; 3) accomplished the polluted farmland IoT integrated system report by the comparison of the results between real samplings and data collecting from the water quality sensors in thirty locations in Tao-Yuan and Tai-Chung; 4) established the operation mode of water quality monitoring IoT platform, including “early-warning model ”and “pollution source analysis module”; and 5) proposed two academic papers and three patents applications.

water quality monitoring, multi-in-one water quality sensor, internet of things