Contaminant · Health
What Microplastics is, where it hides, and what actually removes it.
Found everywhere — but not every filter catches the smallest pieces.
Short answer
Microplastics are tiny polymer fragments found in tap water worldwide. Not all filters capture the smallest fractions, so check the micron rating and certification.
Where it comes from
Found broadly in surface water, groundwater and even bottled water; more common after heavy rain and near urban runoff.
- •Plastic clothing fibers
- •Food packaging breakdown
- •Industrial pellets and dust
Last reviewed September 2026
Health context
What Microplastics does to health
Grouped by who is most affected, with the practical steps that follow from it. This is a plain-language summary, not our own testing.
Evidence still emerging
Research on human health effects is ongoing; regulators are still agreeing on measurement methods.
What to do about it
- •Look for a filter with an NSF 42/53-certified micron rating.
- •Pair carbon with sediment if your city uses old pipes.
- •Do not rely on a single 1 µm carbon block for nano-scale plastic.
Test before you treat
How to actually test for it
DIY strips mislead for many contaminants. Here’s the honest method for finding Microplastics.
Lab microscopy / Raman or FTIR
At-home tests are unreliable; labs use Raman or FTIR particle counting.
Filter guidance
What actually removes it (and what does not)
Certification matters more than a marketing claim. Here’s the ranking.
RO
RO filters rated at 0.001 µm remove the overwhelming majority of microplastics.
Activated carbon
A 1 µm carbon block catches larger microplastics and improves taste.
Composite
Multi-stage systems combine sediment, carbon and sometimes RO for the widest coverage.
Normalized database
Compare certified options
Same contaminants, same columns, real source links. Blanks mean “not stated” — we don’t invent numbers.
We have not curated model-level picks for Microplastics yet. The full filter database lists the NSF/ANSI standards each manufacturer states for its models.
FAQ
Common questions
+Is Microplastics in my tap water?
Only a certified lab test (not a taste test or a strip) answers that reliably.
+Does boiling remove Microplastics?
No. Boiling concentrates most contaminants rather than removing them.
+What's the safest first step?
Test before you treat, then choose a filter type certified for Microplastics.