So i have a large pond on a farm. If anything happens id like to be able to go down, get some water and purify for use in home.
Have well water now, the spring feeds the pond. I mention the farm thing bc of fertilizers and other potential runoff. We dont drink our home water rn but use it for brushing teeth and ice cubes. Its been tested and isnt bad but has some turbidity so its not aesthetically appealing.
We made our own biosand filter 7 years ago and use it for all our drinking and cooking water. It has required zero maintenance so far and will only likely ever need a simple cleaning in the future. Simple, cheap, silent and no consumable purchases ever needed.
https://www.cawst.org/services/expertise/biosand-filter/more-information