In the teen's defense, where else can you take a piss at 1AM. Everything is closed and hell no I ain't stepping into Waffle House. I don't think they have those up there either.
This excellent column from Slate nearly made me pee from laughter: http://www.slate.com/blogs/the_slatest/2014/04/17/urine_in_portland_reservoir_how_dangerous_is_pee_in_drinking_water.html Basically calculates that the dude would have to pee for 40 straight days until the water even got close to becoming unsafe to drink. LOL.
