I'm not very familiar with how it "should" be in a 'normal' sample but surely that is not right. The whole situation, with these fibres being put into the water supply and escaping through even the most popular water filters is highly ominous.
I would be willing to send a sample of my skin (im in ireland) if you wish to have a sample for comparison. I'm pretty sure we do not have this .. 'thing' in our water supply, but i do not have a microscope to confirm, although at this stage im quite willing to invest.
What country are you situated in?