Microplastics in Water: How to Evaluate a Filter That Claims to Reduce Them

Microplastics appear increasingly in news about drinking water, oceans, and even the human body. It is natural to wonder whether a home filter can address the issue. The answer depends on how the specific product has been evaluated.

What microplastics are

Microplastics are plastic particles generally smaller than 5 millimeters. They come from larger plastics breaking down, textile fibers, personal-care products, and other sources. Source: EPA

They have been detected in surface water, groundwater, and distribution systems in different parts of the world. Research into their presence and their effects on human health is still developing. Source: WHO

Why “reduces microplastics” needs more context

A filter may claim to reduce microplastics, but that claim needs specific support: which particle sizes were evaluated, by which method, and under which test conditions.

Do not assume that a general certification claim covers every type or size of microplastic. Check the specific information the manufacturer provides and the standards under which the product was tested. Source: NSF

Ask for the laboratory report, not just the word “microplastics” on the packaging.

Which technologies may be involved

Different filtration stages—including reverse osmosis membranes and certain fine-particle filters—can retain particles within particular size ranges, depending on their design.

A technology’s general ability to retain small particles does not automatically guarantee a specific, demonstrated microplastics reduction in a particular model. Each system should be assessed using its own test results.

Questions before buying for this reason

• What laboratory evidence supports the microplastics reduction?
• Which particle size was evaluated?
• Does the test apply to the cartridge or to the complete installed system?
• Is there a recognized certification associated with that performance claim?

Without these answers, it is difficult to compare products fairly.

A reasonable expectation

Reducing microplastics is a valid goal, but it deserves the same evidence requirements as any other filtration claim. Be cautious about broad statements without supporting data.

At PFC, we share available information about our systems so you can assess this performance claim thoughtfully.

Free your water with PFC.

Aquon by PFC