I though I would post an image from Lauterbrunnen (again) showing how clean the water was there. There was a stream out front of the office at the place we stayed.
I asked the lady behind the front desk, "can I drink that water?".
She responded, "You can drink from any source of water here in the valley. Well all except the toilets!".
This small river was super clean. I have never had fresher water. Poland Springs has got nothing on Lauterbrunnen!