Thanks Doug. I have been watching for some time and have only posted 3 or 4 times so far. Thinking of going to greens in about 6 weeks. Just that I noticed the sign on the tap at the dump site said not for drinking. So I asked the question.
I have seen that type of sign on plenty of taps near a dump point, while other taps nearby have a sign saying drinking water, or words to that effect
Perhaps it is because the tap is too close to dump point, and there is a high chance of contamination, as a lot of people use the hose connected, to rinse out their cassette
If the water was not potable, there would usually be a sign near the sink, inside the ablution block