Good point! Interestingly there is evidence that at least some life forms appear to benefit from 'highly radioactive' water.

https://hal.science/hal-03025146v1/file/Petit%20et%20al%2020...

"Direct Meta-Analyses Reveal Unexpected Microbial Life in the Highly Radioactive Water of an Operating Nuclear Reactor Core"

https://journals.asm.org/doi/pdf/10.1128/spectrum.01995-22

"Culturomics of Bacteria from Radon-Saturated Water of the World’s Oldest Radium Mine"