Walmart found to be sourcing bottled water from drought-stricken California

[erronis]

10. What does radon gas in the air have to do with your water?

Please let me know more details since I am in the same circumstances and I don't understand the science behind your claim.

Radon is a gas (quite heavy compared to air N, O2) and tends to accumulate in basements and other not-well ventilated lower spaces. Most radon treatments try to vent this gas to the outside. In our situation radon is produced by granite that is slowly "rotting". This would be on ledge that the house is built upon and also in wells.

However, AFAIK, radon does not dissolve in water and is not a hazard in that case. Of course, I Am Not A Certified Environmental Consultant (IANACEC) so don't take my word for this.

Also, I doubt that any normal commercial whole house filter does anything about radon. My limited chemistry and physics classes, as well as a bit of common sense, would argue against a commercial filter catching an atom like radon.

Are you sure you weren't sold a bill of goods?