Laundry Detergent and Microplastics: What the Evidence Shows

The short answer: the evidence is mixed, and anyone who tells you it is settled is overstating it. Researchers have found small plastic particles in some detergents. The bigger argument is about the water-soluble film (polyvinyl alcohol, or PVA) used in pods and some sheets, and whether it counts as a microplastic at all. Below we lay out what each side has actually measured, what the EPA decided, and how to check a label yourself.

TL;DR

• Studies disagree. One study of 39 capsule brands found no significant microplastic pollution from the capsule material, while other lab work found PVA film residue left in the water.
• A 2021 study estimated that about 77% of PVA stayed intact after conventional U.S. wastewater treatment. The cleaning industry disputes that PVA should be called a microplastic.
• The EPA denied a 2023 petition asking for testing rules on PVA in pods and sheets, so there is no U.S. ban or testing mandate today.
• The practical move is to read the ingredient list for film-forming polymers, and to choose products that publish every intentionally added ingredient.

Table of Contents

• Where laundry microplastics come from
• Why pods and sheets get called microplastic sources
• What the studies actually found
• What happens at wastewater treatment
• What the EPA decided
• What the cleaning industry says
• So are detergent sheets a microplastic source?
• How to read a laundry product label for plastic
• Our perspective
• Where Toss & Go sheets fit
• How to use the sheets
• Other ways to cut plastic in your wash
• FAQ
• Sources

Where laundry microplastics come from

Most conversations about microplastics and laundry mix together two different things.

The first is synthetic clothing. Polyester and other synthetic fabrics can shed tiny fibers in the wash. That is a clothing issue, and it happens whichever detergent you use.

The second is the detergent itself: the product, its film or its packaging. That is what this article covers. If you are searching for how detergent relates to microplastics, you are really asking one of three questions:

1. Does the detergent formula contain plastic particles?
2. Does a pod or sheet film break into plastic particles?
3. Does that film pass through wastewater treatment intact?

The research answers each one differently, so we take them in turn.

Why pods and sheets get called microplastic sources

Many laundry pods use a thin film made of PVA, a synthetic polymer designed to dissolve in water. Some detergent sheets use a similar film as the carrier for the cleaning ingredients. Because PVA is a synthetic polymer, critics argue that it is plastic by another name, and that once it is in the wash it can end up in rivers, soil and sludge.

That argument has reached lawmakers. A bill introduced in New York City, for example, proposed banning detergent pods on the grounds that they are plastic and contribute to microplastic pollution, as reported in April 2024 coverage of the claim. The same coverage lays out the competing views from the EPA, researchers and the cleaning industry.

The disagreement comes down to one definition. Traditional microplastics are solid particles that persist and fragment. PVA is designed to be water-soluble. Whether a dissolved polymer should be treated like a persistent solid particle is exactly what the two camps dispute.

What the studies actually found

A study that found no significant microplastic pollution

A 2022 peer-reviewed study tested 39 brands of water-soluble detergent capsules, using stereomicroscopy and infrared spectroscopy (FTIR). It reported no significant microplastic pollution generated by or transferred directly from the capsule composition. The authors also called for standardized methods to count, classify and characterize microplastics, which tells you the measuring itself is not yet consistent from lab to lab.

A study that found film residue in the water

A 2023 academic study of liquid detergent pods looked at the same question from another angle. It found that the capsule films were not entirely soluble in water, and PVA-based film residues remained after dissolution. It also noted sediment visible in pipes after pod use. The researchers pointed out that the PVA formulation matters: the degree of hydrolysis and structural modifications change how well the film dissolves and how it behaves afterward.

That last point is worth holding onto. “PVA” is a family of materials, not a single substance. A result for one film does not automatically apply to another.

What this means in plain terms

Both studies are real, and they do not strictly contradict each other. One asked whether capsule material shows up as microplastic particles. The other asked whether the film fully dissolves. Neither is the last word, and the first openly says the field needs better methods.

What happens at wastewater treatment

Dissolving in your washer is only the first step. What matters for the environment is what happens next.

A 2021 study by Arizona State University researchers examined PVA in U.S. wastewater treatment. It estimated that about 77% of PVA remained intact after conventional treatment: roughly 61.2% leaving with sludge and 15.7% with treated water. The authors tied the low degradation to PVA’s high affinity for water and to the lack of specially acclimated microorganisms in conventional U.S. plants.

News coverage of the issue adds that filters and microorganisms at treatment plants generally begin to break down dissolved PVA, but some can escape with the water, and that sludge may be spread on fields.

The study’s authors and other scientists describe the long-term fate of PVA residues, including effects on farm soil, as an open research area that needs more data. We think that is the fair summary: a plausible concern, not a proven harm.

What the EPA decided

In 2023 the EPA responded to a petition asking for a testing rule under the Toxic Substances Control Act covering PVA in detergent pods and sheets. The agency denied it. In its letter, the EPA said the petition did not show that existing information was insufficient to determine or predict risks, and that it did not demonstrate that PVA fails Safer Choice criteria. The EPA also noted that the petition leaned on a study of PVA persistence and on microplastics studies, rather than on the soluble PVA used in Safer Choice-certified products.

The same letter confirms that the EPA keeps PVA on its Safer Chemical Ingredients List, and that only certain PVA structures meet the standard for Safer Choice products.

So as of today, the official U.S. position is that the data do not justify a testing mandate. That is not the same as saying the question is closed, and it is not the same as a finding that nothing is wrong.

What the cleaning industry says

The American Cleaning Institute (ACI), the industry trade group, argues that laundry pods do not contribute to microplastic pollution. Its reasoning: PVA film is a water-soluble polymer that dissolves during the wash and is then broken down by microbes in wastewater systems. ACI maintains that calling PVA a microplastic ignores the different chemistry of water-soluble polymers, which disperse in water rather than fragment into persistent solid particles.

That is an industry position, and you should read it as one side of the debate. The 2021 treatment study above is the main data point critics cite against it.

So are detergent sheets a microplastic source?

Here is what we can say honestly:

• Some studies detected plastic particles in some detergents. Methods vary, and results depend on the product type and the lab.
• PVA film is the center of the dispute. Its behavior depends on its specific formulation.
• A 2021 study estimated most PVA survives conventional wastewater treatment. The industry and the EPA do not treat that as proof of a microplastic problem.
• Regulators have not restricted PVA in detergents in the U.S.

If you want the most cautious approach, the answer is simple: do not assume. Read what is in the product.

How to read a laundry product label for plastic

You do not need a chemistry degree. Run through this list before you buy.

1. Look for “polyvinyl alcohol,” “PVA” or “PVOH” on the ingredient list. If a product has a film, a carrier or a coating, it should be named.
2. Check whether the ingredient list is complete. Many laundry products are not required to list everything on the package, so look for a company that publishes full ingredients online.
3. Look at the outer packaging. A plastic jug, a plastic-lined pouch and a cardboard box are different choices, even if the contents are similar.
4. Be wary of vague claims. Words like “green” or “clean” on a front label tell you nothing about film, fiber or packaging.
5. Compare doses. A pre-measured dose cuts over-pouring, which means less product used overall.
6. Ask the company directly. If the label does not say, a customer service email costs you nothing.

For more on swapping out plastic in the laundry room, see our guide to finding plastic-free laundry detergent that works and our walkthrough of ways to reduce plastic waste doing laundry. If you are weighing formats, our comparison of detergent sheets vs. pods covers the practical differences.

Our perspective

We make laundry detergent sheets, so you should know where we stand and where we stay quiet.

We think shoppers are right to ask what is in a laundry product. That is why we list every intentionally added ingredient on our ingredients page, so you can read it before you order instead of guessing. We would rather you check than trust a slogan, including ours.

We also think the microplastics debate is not yet resolved, and we are not going to pretend it is. We will not tell you the science says our sheets solve it, because we make no environmental-impact claims about them. What we can tell you plainly is what we control: Toss & Go sheets are pre-measured, so there is no jug to measure from and no plastic jug to throw away. They ship in plastic-free cardboard packaging. One sheet is a regular load, and the Fragrance Free option has no added fragrance or dyes.

We also think the format question matters less than the habit: use the right dose, wash full loads when you can, and read the label of whatever you buy.

— Purecise

Where Toss & Go sheets fit

If you want a pre-measured detergent in plastic-free cardboard packaging, with a full ingredient list you can read first, Toss & Go is built for that. The sheets are designed to dissolve in cold water and are made for HE and standard machines, front-load and top-load.

There are two sizes:

You can choose Fresh Meadow, which is lightly scented and whose fragrance includes Linalool, or Fragrance Free, with no added fragrance or dyes. Subscribe and save 15%. Every order is covered by our 30-day Keep It or Toss It Guarantee: a refund or a replacement, with nothing to send back.

How to use the sheets

Using a sheet takes a few seconds, and there is no measuring.

1. Put your clothes in the drum.
2. Place one sheet on top of the clothes. It goes in the drum, not in the dispenser drawer.
3. Start your cycle.

Adjust the dose to the load:

• Regular load: one sheet.
• Large or heavily soiled load: two sheets.
• Small load: half a sheet.
• Hand washing: dissolve half a sheet in a sink or basin.

Stains and tough loads

A detergent sheet is not a stain remover, so pretreat when you need to. Rinse the spot in cold water first. Then work in a little liquid detergent or dish soap, or soak the item in an oxygen bleach solution. White vinegar can help with some stains, and chlorine bleach is an option only where the care label allows it. Check the label before you try any of these.

For more about how the sheets compare with other formats on weight and packaging, see our notes on laundry sheet weight vs. a liquid bottle and sustainable laundry packaging alternatives.

Other ways to cut plastic in your wash

The detergent is one piece. A few habits help whichever product you pick:

• Run full loads when you can, so you wash less often.
• Wash in cold water when the fabric and soil allow it.
• Follow the dose on the package rather than pouring by eye.
• Buy fewer, longer-lasting synthetic clothes if you are concerned about fibers, since shedding comes from the fabric, not the soap.
• Choose packaging you can recycle or reuse over single-use plastic where you have the option.

None of these require special equipment, and they work in a dorm laundry room, a shared building or a van.

FAQ

Are laundry pods made of plastic?

Most pods are wrapped in a thin film made from PVA, a synthetic polymer designed to dissolve in water. Whether that counts as “plastic” is the core of the debate: critics say yes, while the American Cleaning Institute says water-soluble polymers behave differently from persistent plastic particles. Check the ingredient list of any pod or sheet you buy.

Do detergent sheets release microplastics?

It depends on what the sheet is made of, and the research does not give one answer for all products. A 2022 study of 39 capsule brands found no significant microplastic pollution from the capsule composition, while a 2023 study found film residues left in the water. Read the ingredient list, and ask the company if it is not published.

Does the EPA regulate PVA in laundry detergent?

The EPA lists PVA on its Safer Chemical Ingredients List, and only certain PVA structures qualify for Safer Choice products. In 2023 it denied a petition seeking a testing rule for PVA in pods and sheets. That means no new testing requirement was imposed.

How do I wash laundry with fewer plastic concerns?

Start with the label: look for film polymers on the ingredient list, and favor products that publish every ingredient and avoid plastic jugs. Use the right dose, wash full loads and choose cardboard packaging when you can. Synthetic clothing sheds fibers regardless of detergent, so fabric choice matters too.

How many loads does a box of Toss & Go sheets cover?

The Box of 50 covers up to 100 loads, since half a sheet handles a small load. The Travel 3-Pack covers up to 30 loads. One sheet is a full dose for a regular load.

Sources

• Lack of Evidence for Microplastic Contamination from Water-Soluble Detergent Capsules (2022 study)
• Determination of Liquid Detergent Pods as a Potential Microplastic Source (2023 study)
• Degradation of Polyvinyl Alcohol in US Wastewater Treatment (2021 study)
• What EPA, researchers and cleaning industry say about detergent pods
• EPA response to the TSCA petition on PVA (2023)
• Ask ACI: Microplastics in Laundry

Recommended

• How to Reduce Plastic Waste Doing Laundry
• How to Find Plastic Free Laundry Detergent That Works
• Sustainability in Action: The Benefits of Using Purecise’s Plastic-Free Detergent Sheets
• Toxic Chemicals in Conventional Laundry Detergents