Cisterns.... Keepin' it wet.

Doesn't really matter. If they get sick, they get sick and they're not in the states, drinking tap water any longer.

Yours doesn't come out of a tap?

The only long term ill effects I remember hearing about cistern water was years ago there was a report of older residents who were very mineral deficient because of drinking only rain water for years had depleted the trace elements normally replenished and present in groundwater and a weekly OTC mineral supplemented was recommended.
I personally do take a mineral supplement because of that idea which seemed to be a reasonable theory.

Doesn't really matter. If they get sick, they get sick and they're not in the states, drinking tap water any longer.

Yours doesn't come out of a tap?

You were speaking of stateside tap water not how I get my water.
Why so combative?

Good grief, forgive me for interjecting a little levity. Combative? Crikey, lighten up!

I don't have to lighten up.
You do.

Are you two related? You sound like a couple of siblings fighting over nothing.:D

Almost as much fun as the "Clown Car" politics over here.:P

Please make up - we need your positive input.

I don't have to lighten up.
You do.

I did.

I drank ours for quite a while with no issues but eventually installed some filters by the pump. Im somewhat glad given what i find in those filters when i change them 🙂

On a side note my doctor recommended a prescription floride toothpaste because of the absence of floride in cistern water and because I have children in the house .