Is Poland's tap water really protected by clams?

There's a lot of articles written about how tap water in Warsaw is constantly tested by a small team of clams. It felt like a hoax to me: so I went to find out. ▪  Thanks to MPWiK Warsaw: https://www.mpwik.com.pl/

Producer: Marcin Krasnowolski https://polishfixer.com
Camera: Michał Opala
Editor: Michelle Martin @onthecrux

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