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Does Pour-over coffee with a paper filter have microplastics?

15/ 100

Coffee

Low exposure

Little or no plastic in contact with the contents. This is the option to switch toward.

Grade C60% confidencePaper filter, glass or ceramic dripper and carafe
15
0 · no plastic contact100 · constant contact

Two numbers, not one. Exposure is how much plastic contact this involves. Confidence is how much anyone has actually measured. How we score

The short answer

The lowest-scoring way to make coffee that we have found. Water contacts paper, then glass or ceramic, and nothing else. Note the qualifier: an electric drip machine is a different product, because its reservoir and hot-water path are usually plastic.

Made ofCeramic and stonewarePaper and paperboard

Why Pour-over coffee with a paper filter scores 15

Where the 15 comes from

Five components, added. The page renders the parts rather than a stored total, so the number cannot disagree with the reasoning behind it.

Packaging contact
3 / 30

What material touches the contents, over how much surface area, for how long. Glass and steel score near zero here; a film pressed against fatty food scores near the top.

Use conditions
8 / 25

Heat, abrasion, flexing, repeated opening, reuse beyond design life. The same bottle scores differently in a fridge and in a hot car.

Measured release
3 / 25

What a laboratory actually counted, for this product or its category. A high number here means real particles were measured, not that the material looks suspicious.

Polymer behaviour
1 / 10

How this specific polymer behaves — brittleness, fat solubility of its additives, thermal stability, whether it is a polymer named in existing restrictions.

Processing
0 / 10

What happened before you bought it. Retort sterilisation inside the pack, hot-filling, and pressurised brewing all happen at the most migration-favourable moment.

Total exposure15 / 100

What we don't know

Paper filters have not been tested for particle release. Wet-strength additives used in filter paper are food-contact approved and are not, as far as anyone has published, a particle source — but "nobody has looked" is the accurate description, not "it is clean".

This section is on every page in the database, including the ones where the answer is comfortable. How evidence grades work →

Better options

Ordered by how much they change, not by how much they cost.

Already the cleanest method in this category

the remaining upgrade is a fully steel or glass kettle

Moka pot

aluminium and steel, no paper, no polymer

Check the one in your kitchen

This page scores Pour-over coffee with a paper filter as a product. Formulations, packaging and suppliers change, and the specific item you own has its own condition — a scratched pan and a new one are not the same object. Scan yours for a score built from what is actually in front of you.

Scan my coffee

Sources behind this score

Each with the finding we use it for and the limitation that finding carries — because a study quoted without its boundaries is how this subject got so noisy.

  1. peer-reviewed2021

    Ranjan 2021 — A disposable paper cup released roughly 25,000 micron-sized particles into 100 mL of hot water within 15 minutes — about the life of a takeaway coffee.

    Limitation: Hot deionised water rather than coffee or tea, and a single cup type. It shows the polyethylene lining degrades at drinking temperature; it does not quantify a dose from a real latte.

  2. report2026

    Earth Action 2026 — Estimated roughly 1,000 tonnes of microplastics migrate from packaging into food and drink annually — about 130 mg per person per year — with PET bottles responsible for around a third, and found UV exposure can raise release up to 100×.

    Limitation: An industry-funded modelling exercise, not a laboratory study, and not peer-reviewed. We use it for the relative ranking of formats rather than for any absolute number.

Frequently Asked Questions

Does Pour-over coffee with a paper filter have microplastics?

The lowest-scoring way to make coffee that we have found. Water contacts paper, then glass or ceramic, and nothing else. Note the qualifier: an electric drip machine is a different product, because its reservoir and hot-water path are usually plastic.

How was the Pour-over coffee with a paper filter score of 15 calculated?

Five components, added: packaging contact 3/30, use conditions 8/25, measured release 3/25, polymer behaviour 1/10 and processing 0/10. The page computes the total from those parts rather than storing it, so the number cannot drift from the reasoning.

Is Pour-over coffee with a paper filter safe?

The score does not answer that and we will not pretend it does. It measures plastic contact, which is a physical property of the product. Whether a given level of exposure affects health is an open question — the FDA states the current evidence does not demonstrate a risk at the levels found in food, while research such as the 2024 NEJM plaque study gives real reasons to keep studying it. Both are true at once.

Why is the confidence only 60%?

No measurement of the product or its category exists. The score rests on published evidence about how this polymer behaves under these conditions — heat, abrasion, contact time, fat content. Because this is not a direct measurement of the product itself, the score should be read as a well-reasoned estimate that could move if someone tests it.

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