"1.67–2.08 ug/ml" is incorrect. Your link states "1.67–2.08 ug/L". In other words, the paper is about the effects of nanoplastic concentrations which are 10,000x greater than in tap water.
Many nasty chemicals are attracted to plastic particles. As bad as the plastics are, they may be carrying something nastier.
Get some nice PCBs stuck to plastic particles and they may not trip contamination sensors, but get deposited in your body where the PCBs become mobile again and end up in your system.
