I was catching and using rain water last year but noticed the chickens were having increasing white, runny urates while using the rain water. As soon as I stopped and went back to well water, the stools changed back to normal. That was rain caught off of an old galvanized tin metal roof.
Since then I worry about using rain catchment water due to heavy metals in the rain(chem trails abound!) and possibly from our roofs, without having the ground strata to properly filter the water for consumption. Now I just use our well water and have a communal watering pan for all animals and this cuts down on waste from emptying the bottom water out of multiple waterers and rinsing before refilling. For chicks who cannot access the communal watering pan, I use nipple buckets, which also decrease waste tremendously by keeping the water clean and only dispensing it in droplets.
My grandmother used to do her dishes in dish pans set down into the sink and washed her dishes in lye soap, then would give the dishwater to the hogs and chickens because it often had food particles in it and she said it "kept them healthier"....and she was right. In researching natural antihelmentics, one listed was soap....as a surfactant, it dissolves the oils that serve to protect the skin of intestinal parasites as they dine in the acidic environment found in the small intestine. Once that protective oily coating is dissolved, the digestive acids can effectively kill the worms and their ovum.
This can increase the value of using grey water for watering livestock if one is careful about the types of soap they use. Salatin uses Basic H, a concentrated soap made from two soy proteins and was first used as a dietary supplement for fattening turkeys and cattle in the UK, but then was discovered to be a very powerful soap/cleanser as well. Using it in the water to provide the antihelmintic affect as well as to improve conditioning of the animals, while getting the cleansing power for one's clothing and dishes would seem to be a win/win/win situation.
I've used Basic H for cows and sheep with good effect....and have even tried it on myself!
Just a couple of the ideas and ways I try to conserve and how they conserved in the past that may tie into attempts to conserve now. Another way is if you are allowed to have an outhouse where you live, it can save you tons on water usage if you utilize it to its fullest.
Great thread, Deb!!
I think this is going to be more and more pertinent as weather patterns become more severe.