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You get a lot of rainwater in HI I'm sure, depending on where you are. Don't most people have big 1,000 gallon rainwater collection tanks in their backyards on the island?

I'm sure on a lot of places such as country sides but I live on a rental in the crowded city of Honolulu. I do however get filtered water from those vending machines every month for drinking and cooking...20-22gallons. Kinda heavy to lug but it is what it is