I'm happy at least you admit it is your assumption.
WHO | FAQs: Japan nuclear concernsCan radioactive contamination be removed from water?
- Standard water treatment procedures may remove significant amounts of radioactive contaminants. Other options to reduce concentrations of radiation contaminants include controlled dilution of contaminated water with non-contaminated water.
- Boiling water will not remove radioactive iodine.
In such serious times, the responsible thing to do is share accurate information.