You can buy an excellent water filter called Berkey. I bought mine from Lehman.com- the specialize in non-electric home goods. Having lived for two years here in the Litlle f’n House on the f’n Prairie with no utilities, it’s safe to say that general store has seen a lot of my money!
I have the Big Berkey. It will filter about 2 gallons probably twice a day. There are two different types of filters, I only use one. I did not buy the one that maybe might filter out radiation. A lot of NGOs use these filters in 3rd world countries. I would haul water from my son’s house and never got the dysentery (as my mother said I would!).
I was thinking of selling the Berkey (I’m up out of third-world living now, even have a microwave) but I think I’ll just find a place to store it. It would be stupid to get rid of it.
When I was a kid, the government in all their wisdom decided to kill the bad fish in the river. So, they drained the river and dropped poison by helicopter. Of course, the good fish also died so ruined the fishing for years. Draining the river meant people’s water wells went dry and those that didn’t were contaminated. My grandparents were worried about our well so decided to haul water in from elsewhere. Our water happened to be fine but the hauled water was contaminated causing us all to nearly die. We were all so sick and couldn’t help each other. No phone to call for help.