Laundry is a top source of microplastic pollution – here’s how to clean your clothes more sustainably

January 20, 2026 – 1:53 PM

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Microplastics are turning up everywhere, from

remote mountain tops

deep ocean trenches

. They also are in

many animals

including humans

The most common microplastics in the environment are

microfibers

Textiles shed microfibers while they are manufactured, worn and disposed of, but

especially when they are washed

. A single wash load can release

several million microfibers

. Many factors affect how many fibers are released, including fabric type, mechanical action, detergents, temperature and the duration of the wash cycle.

My research

focuses on coastal ecology and water pollution, including work in New York and New Jersey marshes and estuaries that are heavily affected by human activities. Here are some things to know about reducing microplastic pollution from your washing machine.

From fabric to water and soil

Once garments release microfibers in washing machines, the fibers enter the wastewater stream, which generally goes to a wastewater treatment plant. Advanced treatment plants

can remove up to 99% of microfibers

from water. But since a single laundry load can produce millions of fibers, treated water discharged from the plant still contains a huge number of them.

Microfibers that are removed during treatment end up in

sewage sludge

– a mix of solid materials that is processed to remove pathogens. In many cases, treated sewage sludge is applied to soil as a fertilizer. This allows microfibers to enter air and soil, and to be transferred to soil organisms and up the terrestrial food web or

taken up by crops

Microplastics that wash into rivers, lakes and bays can have many harmful effects. They may be consumed by fish and other aquatic animals, affecting their

biochemistry, physiology, reproduction, development or behavior

phthalates

bisphenol A

that can leach out and may have health effects in humans and animals, including

effects on the endocrine system

Textile microfibers also contain additional chemicals that

have been shown to be toxic

, such as

fabric dyes

anti-wrinkle agents

flame retardants

. In addition, contaminants that are present in the water, such as metals and pesticides, can stick to microplastic particles, turning them into a veritable cocktail of contaminants that may be

transferred into animals that eat them

Washing more sustainably

Not all fabrics shed microfibers at the same rate. A loosely woven fabric that feels fluffy or fuzzy, such as fleece, sheds more than a tightly woven one. While garments made of natural fibers, such as cotton and wool, would appear to be a solution, unfortunately they

also shed microfibers

that can pick up pollutants in the environment.

Some textile scientists and manufacturers are developing

fabrics that shed less than existing ones

, thanks to features such as longer fibers and coatings to reduce shedding. Meanwhile, here are some ways to reduce microfiber shedding from your laundry:

Do laundry less often. Washing full loads instead of partial loads reduces release of microfibers because garments are

exposed to less friction

during the wash cycle.

Use cold water, which

releases fewer microfibers

than hot water.

Use less detergent, which increases microfiber release.

Use a front-loading washing machine, whose tumbling action

produces less microfiber release

Dry laundry

on a clothesline

. Running clothes in dryers releases additional microfibers into the air from the dryer vent.

Several types of products collect microfibers in the washer before they are released with wastewater. Some are laundry bags made of woven monofilament, a single-polyamide filament that does not disintegrate into fibers. Laundry is washed while enclosed in the bag, which traps microfibers that the garments release. A study of one such product,

Guppyfriend

, found that it

collected about one-third of released microfibers

Another device, the

Cora Ball

, is a plastic ball with spines topped with soft plastic discs that capture microfibers. It

reduces microfibers by about 25% to 30%

, but may not be suitable for loose knits because it can snag on threads and damage clothing.

Filter your washwater

Several brands of

external filters

are available

that can be

retrofitted onto existing washing machines

. External filters can

remove up to 90% of microfibers from rinse water

. Their average cost is about US$150. Owners need to clean the filters periodically and dispose of the collected microfibers with other solid waste, not down the drain, which would put them back into the wastewater stream.

significantly reduced microfibers in treated water

from the local treatment plant.

Some companies are now manufacturing washers with

built-in microfiber filters

. France has

enacted a requirement

for all new washing machines to be equipped with filters by 2025, and Australia has announced that

filters will be required

in commercial and residential washers by 2030.

vetoed the bill

, saying he was concerned about the cost to consumers. An economic study commissioned by Ocean Conservancy found that filters would increase the price of washing machines by

only $14 to $20 per machine

. Several states are

considering regulations that would require filters in washers

In my view, requiring manufacturers to add filters that can trap microfibers to washing machines is a reasonable and affordable step that could rapidly reduce the enormous quantities of microfibers in wastewater. The eventual solution will be reengineered textiles, which won’t shed, but it will take some time to develop them and move them into clothing supply chains. In the meantime, filters are the most effective way to tackle the problem.

Judith Weis

, Professor Emerita of Biological Sciences,

Rutgers University – Newark.

The Conversation

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