I think the posts mentioning legionella are confusing the types of A/C. Legionella can be found in evaporative type A/C systems, where the water is generally warm - on a compressor
type A/C the water that condenses is cold, from contact with the cold evaporator (which is why it condenses) .
I think I would still probably only use the water for washing
etc though, unless I had run out of other water.
Years ago some German friends of ours managed to get their rented Landcruiser bogged near Lake Eyre, it took them about a week to dig themselves out, and lucky for them the cruiser had A/C, and Marc was smart enough to collect the water, because they likely would have died there without it. (yes there was water on the ground there, which is why they got bogged, but it is extremely salt)