Researchers find microplastics in water run through common household appliances
-
In testing by Water Filter Guru, a drip coffee machine sample contained about 453 plastic particles per liter, versus about 131 per liter from a high-power blender.
-
Even simpleuse appliances like drip coffee machines and blenders were found to shed microplastics into the water processed.
-
The study did not identify plastic types or link exposure levels to health limits (none currently exist), so the numbers show presence, not risk thresholds.
We tend to worry about plastic bottles, takeaway cups, and visible packaging when it comes to plastic exposure. But what if the appliances in your own kitchen are quietly contributing to your plastic burden?
Thats the idea explored by Water Filter Guru in a recent experiment. They asked: could a common drip coffee machine or a high-powered blender actually be introducing microplastic particles into the water you drink or the beverage you blend?
The findings suggest that yes, they canand that the level of exposure may vary more than many expect.
How the test was done
Researchers at Water Filter Guru used distilled water for their experiment to minimize pre-existing contaminants. They focused on the study on two appliances: one standard drip coffee machine, and one high-power blender.
After running water through each machine (or blending it), they collected samples in clean containers and sent them to a certified lab via the Tap Score Microplastics Water Test kit.
The lab then used fluorescence microscopy to count microplastics across size ranges:
Results were converted into particles per liter for easier comparison.
Important limitations: the test did not determine the polymer type (what kind of plastic), it did not establish safe or regulatory limits (because none exist for microplastics in drinking water), and the smallest size category (
The results
Heres a look at the key findings:
-
The drip coffee machine sample had about 453 particles per liter, compared to about 131 particles per liter for the blender.
-
Put in simpler terms, thats roughly 30 plastic particles in an 8-ounce cup from the coffee machine, versus about 9 particles in an 8-ounce cup from the blender.
-
The size distribution of the particles also differed: the blender water was dominated by smaller dust-sized particles (
-
Because particles under 10 m were only marked detected, the true particle counts may actually be higher than reportedespecially for the coffee machine.
-
The study emphasises that while we cant say this level is safe (because no benchmark exists), the results signal that familiar kitchen appliances can be a previously under-appreciated pathway of microplastic exposure.
What consumers can do
There are some simple ways to cut down on microplastics from kitchen appliances. Heres a few suggestions:
- Run a few dummy cycles. Before using a new appliance especially coffee makers, blenders, or kettles run several rounds with plain water. This can rinse away loose manufacturing residue or microplastic flakes from tubing and seals.
- Swap in glass or stainless steel. Whenever possible, use glass carafes, stainless-steel blades, and silicone-free seals. These materials are less likely to shed microplastics into hot water or blended liquids.
- Avoid high heat with plastic parts. Heat accelerates plastic breakdown. Dont run boiling water through plastic pitchers or leave hot liquids in plastic travel mugs for long periods.
- Clean gently but regularly. Scrubbing with abrasive sponges can release micro-fragments from plastic surfaces. Instead, wash with soft cloths or brushes, and rinse thoroughly.
- Filter your water. Some advanced carbon-block or membrane filters can reduce microplastic content, particularly for particles above 1 m. Check the manufacturers specs before buying.
- Stay informed. There are no current federal limits for microplastics in drinking water. Keeping an eye on new research or testing your tap water occasionally can help you make informed choices.
Posted: 2025-11-11 18:54:15










