I have seen a post that said you should not swim with a PH at or below 7.0 and I think I saw that someone posted that its okay to swim in clorine levels below 15 ppm.

Personally, I wouldn't swim in a green/yellow pool for several reasons. As far as cloudy - I think it would depend on why - was it because there were 5 kids in the pool? I would wait for it to clear - because it's probably due to excess biological waste in the pool.