It seems that PFAS levels up to 200 times the national standard have been detected in wells around Ichihara. Japan’s provisional standard is set at 50 ng/L, while in the U.S., it’s 4 ng/L. Based on U.S. standards, that’s 5,000 times the limit. It’s also been detected around Kashiwa City in Chiba, which is concerning. I’m using a BRITA filter and plan to install a water purifier soon, both of which claim to remove over 80% of PFAS, so I can feel reassured for now.
