I used roof-collected rain water in Comboyne, NSW...filtered out the big bits with a couple of filters used for milk. I was on a dairy farm -- developing 4x5's in trays in a no longer used house, so there were more larva, etc in the tank than down at the main house. I had to stop for awhile after mid-night when a thunderstorm moved through. I was not light-tight enough for lightning flashes! I was developing negatives from 5 months of bike-touring in NZ. I did not want to 'flash' any of them!
I mixed all my chemicals up with the cleaner water from the main house rainwater tank. The farm pumped from the creek for non-potable purposes.
Some of them came out okay...
Truman Cove, 1987
West Coast, South Island, NZ
Tolaga Bay Wharf, 1986
East Cape, North Island, NZ
Both 16x20 silver gelatin prints