Evidence map›Paper›PMID 32735575›Full record

SynthesisPloS one2020

Microplastic contamination of drinking water: A systematic review.

Evangelos Danopoulos, Maureen Twiddy, Jeanette M Rotchell

Abstract readSystematic Review
In one paragraph

Synthesis in PloS one, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 76 papers, 5 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
76citing papers in PubMed, 5 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

76 citing papers in PubMed, 5 syntheses or guidelines pooled it.

  1. Systematic review of potential developmental and reproductive toxicity of microplastics.Toxicological sciences : an official journal of the Society of Toxicology · 2025
    Pooled it
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  6. Review
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  8. Article
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  12. The "plastic spine" phenotype and the spine exposome: emerging links between micro- and nanoplastics and spinal disorders.European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society · 2026
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  16. Microplastic-Mediated Delivery of Di-butyl Phthalate AltersMicroplastics (Basel, Switzerland) · 2025
    Article
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  20. Chronic Waterborne Exposure to Polystyrene Microplastics Induces Kupffer Cell Polarization Imbalance and Hepatic Lipid Accumulation.FASEB journal : official publication of the Federation of American Societies for Experimental Biology · 2025
    Article

16 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

3 authors.

Evangelos DanopoulosHull York Medical School, University of Hull, Hull, United Kingdom.ORCID 0000-0002-9186-8811
Maureen TwiddyHull York Medical School, University of Hull, Hull, United Kingdom.
Jeanette M RotchellDepartment of Biological and Marine Sciences, University of Hull, Hull, United Kingdom.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundMicroplastics (MPs) are omnipresent in the environment, including the human food chain; a likely important contributor to human exposure is drinking water.

objectiveTo undertake a systematic review of MP contamination of drinking water and estimate quantitative exposures.

methodsThe protocol for the systematic review employed has been published in PROSPERO (PROSPERO 2019, Registration number: CRD42019145290). MEDLINE, EMBASE and Web of Science were searched from launch to the 3rd of June 2020, selecting studies that used procedural blank samples and a validated method for particle composition analysis. Studies were reviewed within a narrative analysis. A bespoke risk of bias (RoB) assessment tool was used.

results12 studies were included in the review: six of tap water (TW) and six of bottled water (BW). Meta-analysis was not appropriate due to high statistical heterogeneity (I2>95%). Seven studies were rated low RoB and all confirmed MP contamination of drinking water. The most common polymers identified in samples were polyethylene terephthalate (PET) and polypropylene (PP), Methodological variability was observed throughout the experimental protocols. For example, the minimum size of particles extracted and analysed, which varied from 1 to 100 μm, was seen to be critical in the data reported. The maximum reported MP contamination was 628 MPs/L for TW and 4889 MPs/L for BW, detected in European samples. Based on typical consumption data, this may be extrapolated to a maximum yearly human adult uptake of 458,000 MPs for TW and 3,569,000 MPs for BW.

conclusionsThis is the first systematic review that appraises the quality of existing evidence on MP contamination of drinking water and estimates human exposures. The precautionary principle should be adopted to address concerns on possible human health effects from consumption of MPs. Future research should aim to standardise experimental protocols to aid comparison and elevate quality.

Indexed as

Drinking WaterEnvironmental MonitoringFood ChainMicroplasticsPolyethylene TerephthalatesPolypropylenesPublic HealthWater Pollutants, ChemicalDrinking WaterMicroplasticsPolyethylene TerephthalatesPolypropylenesWater Pollutants, Chemical

Identifiers

PMID32735575
PMCPMC7394398

What OpenQuestion holds

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LicenceCC BY
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Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.