Thanks for all the water discussion. Regarding rain; it depends on what is upwind. South central MT is generally very good. We close the collection off if there is smoke in the air or other worries upwind. One thing I found when researching rain was that a blind study was done in the outback of Australia, supplying filters to people who drank rain water. Half got filters with holes in them. Turned out that filtration had no effect on illness. The secret is to keep it in a dark, cool underground tank and to let it settle. I fill at one end and take out at the other of a second tank that gets overflow from the first. I use Doulton ceramic filters that were invented during the black plague. They get most viruses and all bacteria.
I have asked many about using rain for brewing and get a lot of opinions that don't seem to make sense. I will try it one of these days. With most things, I have found that the general consensus is usually wrong. You have to try things for yourself.
The best city water in the country is in Lewistown, MT. They have a huge artesian spring just outside of town. The best oatmeal stout I have ever tried was a seasonal brew in a brewery on Main Street in Lander, WY. It is adjacent to the Cowfish Restaurant. Their city water is also wonderful.
If you tried to pour water on our Calico, you might just lose your hand.
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Bob
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