Вода! Чистая питьевая вода!

[Oleg]

наверное это вода из малых горных рек? так она чистая, пил неоднократно и жив здоров

Yes. They test the water every day, and based on these tests, they publish "an advisory" in the local newspapers. The advisory usually says that everyone can drink the water except pregnant women, small children, seniors, patients with compromised immune system, etc.