Microplastics in Tap Water
Microplastics are plastic fragments smaller than 5 millimetres (down to microscopic nanoplastics) that shed from packaging, textiles, tyres and the breakdown of larger plastic waste. They are an emerging contaminant: increasingly detected in tap and bottled water, but not yet federally regulated in drinking water.
Also known as plastic particles, nanoplastics
Breakdown of plastic litter, synthetic textile fibres, tyre and road wear, and plastics used in distribution and bottling; they enter source water and can pass through conventional treatment.
- 1Plastic packaging and litter breakdown
- 2Synthetic textile fibres
- 3Tyre and road wear
- 4Plastic distribution and bottling
Most affected: Health effects are still being studied; infants and pregnant people are commonly prioritised in emerging-contaminant guidance as a precaution.
A result is read with its context
Microplastics are not part of standard EPA compliance monitoring, so most public water systems do not report them. Where results exist they come from research studies or state programs (e.g. California), not routine federal data. No number here means it was not measured, not that none is present. PurityMap does not yet publish a per-system measured value for Microplastics; this page is a reference explainer. To learn what is in your own water, check your utility’s Consumer Confidence Report (CCR) or use a certified home test.
- Above reference
- Evidence exceeds a reference level.
- Detected
- This substance was found in the monitoring record. Being present is not the same as being above a reference level, and this signal does not say which.
- Not detected
- Somebody looked and the laboratory reported nothing above its reporting limit. This is a result, and it is not the same as nobody looking.
- Not monitored
- No sampling for this substance has been reported for this system. Nothing is known either way, and an empty row is not a clean one.
No city results or violations published yet
- MeasurementsPendingNo per-system values
PurityMap does not yet publish a measured value for microplastics.
- ViolationsCheckedNone on the federal record
No city in PurityMap’s record has a microplastics violation in EPA SDWIS since 2016.
- CitiesPendingNo detections on record
No city in PurityMap’s record shows microplastics detected.
This fills in as monitoring data is published. Until then, your utility’s Consumer Confidence Report lists its results, or use a certified home test.
What can carry a microplastics reduction claim
- Reverse osmosis
Semi-permeable membrane separation removing dissolved minerals, heavy metals, and persistent fluorinated chemicals down to 0.0001 microns.
- Nanofiltration
- Fine activated-carbon block filtration
Highly porous adsorption media targeting chlorine, disinfection byproducts, volatile organic compounds, and organic chemicals.
Boiling does not remove a dissolved chemical compound and can concentrate it. Many pitcher and refrigerator filters carry no verified claim for a compound like this at all.
A finding establishes the need, the need names the capability, the capability requires a verified certification. No product appears before that sequence completes. Filter Finder →
Frequently asked
Answers cite the same records as the page. How PurityMap analyzes water data
Microplastics are plastic fragments smaller than 5 millimetres (down to microscopic nanoplastics) that shed from packaging, textiles, tyres and the breakdown of larger plastic waste. They are an emerging contaminant: increasingly detected in tap and bottled water, but not yet federally regulated in drinking water.
There is no enforceable federal limit. The record reads: None (not federally regulated in drinking water). PurityMap reads every measurement against its stated benchmark and never sets its own.
Plastic packaging and litter breakdown, Synthetic textile fibres, Tyre and road wear, Plastic distribution and bottling.
Research into the human-health effects of ingested microplastics is still emerging and does not yet support a specific safe or unsafe level. Studies have detected microplastics in human tissue and are investigating possible inflammatory, chemical-carrier and endocrine effects. Because the science is unsettled, PurityMap presents microplastics as an emerging concern rather than a scored finding; we do not imply a health verdict the evidence does not support.
Treatment technologies commonly certified to reduce Microplastics include Reverse osmosis, Nanofiltration, Fine activated-carbon block filtration. Match the exact certified claim to your water before buying. Holding a format is not the same as holding the claim.