Organic fluorine compounds, which have been pointed out to be harmful, have been detected one after another in the drainage of the U.S. Navy Yokosuka base in Kanagawa prefecture. It was found that a concentration of organic fluorine compounds was detected.
On the 21st, Kanagawa Prefecture verbally requested the Ministry of Defense to prevent recurrence and thoroughly investigate the impact on the surrounding environment in Japan and the United States.
On the 24th of last month, at the U.S. Naval Base Atsugi, which straddles the cities of Ayase and Yamato in Kanagawa Prefecture, fire extinguishing agents containing organic fluorine compounds, PFOS and PFOA, which have been pointed out to be harmful, were poured into the Tategawa River, which flows through the base. ), the U.S. Navy explained to the Ministry of Defense that it was accidentally released into a reservoir that leads to
When the Ministry of Defense conducted a survey at two locations outside the base in Tatekawa, it detected organic fluorine compounds at a concentration 3.6 times higher than the guideline value indicated by the government in downstream water.
According to Kanagawa Prefecture, the Atsugi base has released the water from the regulating pond where the fire extinguishing agent was released, and has finished collecting and washing the accumulated mud.
On the 21st, Kanagawa Prefecture verbally requested the Ministry of Defense to prevent recurrence and thoroughly investigate the impact on the surrounding environment in Japan and the United States.