Does Plastic colander have microplastics?
The short answer
You pour boiling water through it, several times a week, and it is the kitchen habit nobody questions. A full pot of pasta water at 100°C passing over a polymer surface is a more aggressive condition than most things this site scores.
Why Plastic colander scores 47
Water at a rolling boil, poured directly onto and through the polymer, in volume
Hot food then sits in it while it drains, and starchy pasta water is not a neutral medium
Shaking and tipping the colander drags the food across the surface — abrasion at peak temperature
Old colanders discolour and go chalky, which is the surface degrading where you can see it
Where the 47 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
- 14 / 30
- Use conditions
- 22 / 25
- Measured release
- 6 / 25
- Polymer behaviour
- 5 / 10
- Processing
- 0 / 10
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.
Heat, abrasion, flexing, repeated opening, reuse beyond design life. The same bottle scores differently in a fridge and in a hot car.
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.
How this specific polymer behaves — brittleness, fat solubility of its additives, thermal stability, whether it is a polymer named in existing restrictions.
What happened before you bought it. Retort sterilisation inside the pack, hot-filling, and pressurised brewing all happen at the most migration-favourable moment.
What we don't know
Unmeasured, and it is one of the more surprising gaps — this is a near-universal weekly habit. The closest relevant work is the microwaving study on polypropylene containers, which is a different geometry at a comparable temperature. We are reasoning from the condition, not transferring a number.
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.
Stainless steel colander
costs about the same and lasts for decades
Tip the pan with the lid ajar
free, and it is what most cooks do anyway
Retire any colander that has gone chalky
that whitening is the polymer surface failing
Check the one in your kitchen
This page scores Plastic colander 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 cookware & prepSources 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.
- peer-reviewed2023
Hussain 2023 (Nebraska) — Three minutes of microwaving released up to 4.22 million microplastic and 2.11 billion nanoplastic particles per square centimetre of container surface.
Limitation: Polypropylene and polyethylene containers with water and acetic acid, not real food. The headline figure is the worst case in the study, per cm², not per meal.
- peer-reviewed2019
Hernandez 2019 (McGill) — A single nylon or PET pyramid tea bag steeped at 95°C released about 11.6 billion microplastic and 3.1 billion nanoplastic particles into one cup.
Limitation: Four commercial bags, brewed empty of tea leaves to avoid interference. The particle count is enormous but the total mass is small, and the study measured release into water, not what happens after you drink it.
- peer-reviewed2023
Yadav 2023 — Chopping on a plastic board generated an estimated 14.5–71.9 million polypropylene microplastics per person per year, and around 79.4 million from a polyethylene board.
Limitation: Controlled chopping by a set protocol, extrapolated to annual figures. Real kitchens vary enormously in board use, knife type and replacement frequency.
Frequently Asked Questions
Does Plastic colander have microplastics?
How was the Plastic colander score of 47 calculated?
Is Plastic colander safe?
Why is the confidence only 56%?
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Plastic cutting board
Polypropylene or polyethylene board
Grade A · 88%
Plastic electric kettle
Polypropylene or ABS body with a plastic lid, filter and water window
Grade C · 60%
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