Japan will conduct its first thorough survey on the concentration of potentially harmful chemicals known as PFAS in tap water after the substances were detected in filtration plants and rivers across the country, a government source said Saturday.The government called for prefectural governments and water utility companies authorized by the state in late May to provide data on PFAS, or polyfluoroalkyl substances, commonly referred to as "forever chemicals." The results will inform discussions aimed at reconsidering water quality targets.PFAS is a general term for a group of over 10,000 arti…READ FULL ARTICLE