For some reason, the maintenance team has chosen to leave the water in it. Stagnant water is scary these days, that's how West Nile Virus is spread (if you believe the news).
If nothing else, it just looks scary.
|Broken hot tub near my apartment at Ridgepointe
I am not sure what is floating on top... tree debris, white goo, bug carcasses, snot?
There could be a dead body at the bottom and no one would know.