[incontrol]

I believe mussels are now (2025) protecting more cities.

What is cool about Warsaw is the TAWARA-RTM (TAp WAter RAdioactivity Real Time Monitor.

"Warsaw as the first city in the world is protected by a comprehensive system that is capable to monitor in real-time radioactivity of municipal water and by an innovative spectroscopy system capable to identify any detected contaminants"

https://www.ncbj.gov.pl/en/aktualnosci/state-art-system-moni...

[dorfsmay]

Interesting and surprising, to see that they have English versions online.

[Xelbair]

Almost all(i haven't checked them all myself) government sites in Poland have both Polish and English versions.

[extraduder_ire]

It's likely already planned, but testing for radioactivity in wastewater too would likely detect any released radioactive material that didn't impact tap water.