Don’t count on using swimming pool water as a potable source. Its not safe to drink due to all the chemicals that put into swimming pools.
Safe for cleaning and other things besides food.
You didn’t see the part where I said “non-potable” reserves”? ;)
The chlorine in a pool, if not left do dissipate, will harm your kidneys.
Sunlight will break down chlorine to safe levels, eventually, but then you’ve got other stuff to worry about by then.