[St_Thomas_Aquinas]

80% urine, 10% water, 5% blood, 2% skin, 1% bandaids, 1% candida, 1% hair. typical public swimming pool contents

And don't forget dead people. A dead body wasn't noticed in the deep end of a Massachusetts state-run swimming pool for days.

[Hardraade]

Well, at least he wasn’t in the drinking water...