Drinking Water

Hi,

I lived in Okinawa (OIST - which is next to Onna), and was drinking the tap water there for 5 months. Only now do I see all the news about the military chemicals contaminating the drinking water (https://www.okinawatimes.co.jp/articles/-/998284, https://www.stripes.com/news/okinawa-residents-warned-about-pollutants-in-spring-water-outside-kadena-air-base-1.580430), and I'm getting concerned.

Does anybody know if this would have affected the tapwater around Onna? And how concerned should I be? Those chemical concentrations seem pretty high.