What I understand from solar distillation of water process is that the sun's heat causes water to evaporate, separating the water vapor from salt or impurities. So there's no transfer of contaminants. You can do this on fertilized lawns! The drinking of distilled water has been both advocated and discouraged (because of the lack of beneficial minerals) for health reasons. http://en.wikipedia.org/wiki/Distilled_water I don't understand why we need minerals in our water. We get minerals from food. Why we need them in our water?