A representative of the Ministry of Defense visited the Yokosuka City Hall on the 17th in response to the high concentration of PFAS, an organic fluorine compound that has been pointed out to be harmful in the wastewater discharged from the U.S. Navy Yokosuka base in Kanagawa Prefecture. He explained that the concentration in the wastewater fell below the national guideline value after the pollution control measures were taken by the company.

Since May last year, PFAS, which has been pointed out to be harmful, has been detected in the wastewater from the wastewater treatment facility of the U.S. Navy Yokosuka Base in Yokosuka City, at a concentration exceeding the national guideline value. Up to 258 times the guideline value.



Regarding this, the person in charge of the Ministry of Defense visited Yokosuka City Hall on the 17th and conveyed an explanation from the American side to Mayor Katsuaki Uechi.



In November last year, after installing a filter that adsorbs PFAS in the wastewater treatment facility, three surveys conducted by the U.S. side found that "PFAS" in the wastewater that passed through the filter was 7.3 per liter at the highest. nanograms and the national guideline value of 50 nanograms per liter.



On the other hand, before passing through the filter, it still exceeds the national guideline value, and the US side says that the cause is under investigation.



In addition, the request by the Japanese side to disclose the results of investigations on sludge from wastewater treatment facilities was refused.



Mayor Kamiji said, "Since there are citizens who work at the base, I want the cause to be investigated as soon as possible."