re: Tap water purification methods for drinking/cooking, etc.

I have 3 of those for emergency/boil-notification times. Few years ago there was a bad ice storm/freeze in Shreveport, parents lost power and we all lost water pressure. Lucky we had gas cooktops so snow was melted, boiled, cooled, then fed through those Sawyers on a camping water bag hung from the pot rack over the kitchen island... Worked well enough to have plenty of drinking/cleaning water without having to go through cases of bottled water.