Question

water coming from ac is useful or not ?​

Answer 1

Answer : Well, it's not wastewater. It's condensate.

While water condensed from the air is distilled, the collection leaves a lot to be desired. The coils where it condenses and the drip pans that catch it are not kept clean and is a breeding ground for various molds and bacteria.

If you have a typical years old house the A/C drain pan and plumbing gets dusted once a year and sterilized… never.

I would strongly advise not drinking it.

I know for a fact that if I don't dump a cup of bleach into the condenser pan every few months the the black slime mold will clog up the drain and cause an overflow and leak. Same black slime you get on the nozzles of ice and soda machines at restaurants if they don't keep it clean.