There are several reasons for cloudy swimming pool water and too numerous to mention them all here. It could be risky swimming in cloudy swimming pool water because it is an indication that the water is not in appropriate sanitary conditions. Check the link for causes and remedies to correct the situation.
No, that would be dirty water, so no.
Not if it's cloudy from pee pee
No because it might rain or get freezing
Yes but don't open your eyes and try not to drink it
It's not very good to swim in cloudy pool water, not that it's harmless but you don't know what it's cloudy from. Be cautious!!!!