Evaluation method for underground formation of mineral water and contamination of surface water （J)

Abstract

The mineral water that naturally springs up to a hardness of 70 to 130 due to the elution of mineral components after the rainwater that fell on the mountaintop 100 to 1000 years ago penetrates the bedrock, has been a civilized city in Rome and the world for about 2000 years. In Japan, there is a culture of evaluation that it is good for health as a bathing hot spring and drinking water. Further, mineral water includes weakly acidic hypochlorous acid water having a pH of 6.3 to 6.8, which contains salt and has bactericidal properties. These spring up only in a limited area, and it is difficult to distinguish them from the well water of general surface water. This study is a study on the criteria for distinguishing between surface water and mineral water. As a result of research, substances that exist in surface water but not in deep mineral water includes organic substances (chemical substances) and bacteria. It was clarified that substances existing in deep mineral water but not in geological water are mineral components that elute over a long period of time.