I’m my opinion NO !,
You really want to be Filterering your Raw water, Not nessasarily adding stuff to it. If you constantly use Questionable Raw water sources have a UV tube fitted after your filter system in the last tube before the Fresh water tank.
They’re Getting cheaper every year & are very small, easy to fit & apart from checking & Changing the Bulb Maintenance free. (I don’t use UV lamp any more, I just Filter).