Solar water treatment is being used a lot in many parts of the world where there is no water treatment available. Simply fill a clear bottle with water and set it in the sun all day. Ol' Sol does the rest.
Home UV water treatment systems do nothing but channel water past a UV bulb. There's nothing elaborate about them.

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“In a time of deceit telling the truth is a revolutionary act.”
― George Orwell

It's not over when you lose. It's over when you quit.