pwa wrote:hufty wrote:pwa wrote:And how do these things cope with the potential pollutants from former industrial activity, such as lead and cadmium? Lots of apparently remote and unspoilt places in France have old abandoned mine workings upstream.
A variant of the "there could be a dead sheep lying in the beck higher up" line that someone always trots out whenever you announce that you drink from streams in the Lake District.
There are streams and rivers in the apparently unspoilt centre of Wales that have water that is unfit to drink because of the presence of toxic minerals from abandoned mine workings. Cwm Yswyth is one of the better known examples. The remote areas of France have a lot of abandoned mines. Some used to produce uranium! So it is not a myth. A bottle of apparently clean water could contain something really nasty. The dead sheep thing is easier to deal with. Just find a point where the water emerges from the ground. Never a river. Unless you are desperate.
I am very much in agreement with Gattonero, in that I think a little bit of dirt is good for you, so long as that dirt is only stuff that might give you a bad tummy for a couple of days.
Ooh uranium sounds really scary doesn't it, but unless there was a refinery to extract all the useful isotope out I imagine there won't be a problem with tailing pond leakage and so on. You might not want to start a bottling plant in that part of Wales but a few litres as you pass through is not going to cause a dangerous build-up of toxins in your kidneys.