Microplastics show up in environmental samples worldwide. Here is how they get into water, what research is still settling, and what filters may help.
Microplastics are plastic particles less than 5 mm in size. They have been found in oceans, air, food — and in tap water studies around the world.
Sources include plastic pollution, degradation of larger plastics, synthetic fibers, and industrial discharge. Treatment plants reduce many contaminants but may not eliminate all particles.
Health agencies are still building the evidence base for long-term human risk at low levels. That uncertainty does not mean “ignore everything else” — lead, PFAS, and bacteria are clearer priorities where present.
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