Yes, that is correct. But even more to the point, filtering mercury from water is trivial.
“But even more to the point, filtering mercury from water is trivial.”
Effective Filtration Technologies
Reverse Osmosis (RO): Forces water through a semi-permeable membrane. This process removes 95% to 97% of mercury along with other dissolved solids.
Activated Carbon: Uses porous carbon media to trap organic and inorganic mercury compounds. Note: The specific filter model must be explicitly tested and rated for heavy metals, as standard carbon filters only target taste and odor.
KDF (Kinetic Degradation Fluxion): Uses copper-zinc formulations to change mercury into insoluble matter that can be physically strained out.
Distillation: Heats water into steam and re-condenses it into a separate container, leaving the heavy metals behind.
https://www.google.com/search?q=drinking+water+filtering+mercury