Pesticides on fruit and vegetables: does washing really work? What it can and cannot reduce

Rinsing an apple, a bunch of grapes or salad leaves before eating them is routine. But if the aim is to reduce pesticides on fruit and vegetables, how much does washing actually achieve? A scientific review published in 2026 analysed 47 studies covering 23 types of produce and 79 pesticides. Overall, washing can reduce some pesticide residues, but the result varies greatly depending on the pesticide, the produce and the washing method. Most importantly, washing does not necessarily remove every residue.

Does washing fruit and vegetables really reduce pesticide residues?

Yes, washing can reduce some residues. The scoping review published in Frontiers in Environmental Health collected 1,100 experimental data points involving four household-accessible methods: rinsing under tap water, soaking in tap water, soaking in a baking soda solution and soaking in vinegar or acetic acid.

The most useful finding for consumers, however, is not that one method always wins. Results varied widely between experiments.

Across the dataset, the median reduction was 30.2% for rinsing with tap water and 33.7% for soaking in water. Some experiments achieved much larger reductions, while others removed very little.

Why can some pesticide residues be washed off while others cannot?

Pesticides do not all behave in the same way. Some remain mainly on the surface of the produce, while systemic pesticides can be absorbed into plant tissue. Once a residue is inside the fruit or vegetable, some of it may be beyond the reach of washing.

The characteristics of the produce matter too. Natural or added waxes can make some residues harder to remove, while different types of skin and flesh affect how chemicals are distributed.

This is why a figure such as a 30.2% median reduction with rinsing should not be interpreted as a promise that washing any apple, strawberry or pepper will remove exactly 30% of its pesticide residues.

Does baking soda remove pesticides?

The review found an interesting difference, but it needs to be interpreted carefully.

Across the studies, soaking produce in baking soda solutions produced a median pesticide reduction of 50.9%, higher than the overall result for water alone. But that does not mean adding some baking soda to a bowl of water at home will remove half of the pesticides from your fruit.

Baking soda concentrations in the reviewed experiments ranged from 1.25% to 10%. The authors specifically note that some studies used baking soda or vinegar concentrations that may be unrealistically high for consumers and could affect the taste or quality of produce.

The experimental figures therefore cannot be turned into a universal home recipe or a guaranteed percentage of pesticide removal.

What about vinegar?

Vinegar and acetic acid solutions also performed well in a number of experiments. Across the review, their median reduction was 54.2%.

Again, context matters. Acetic acid concentrations ranged from 0.15% to 10%, so the figure does not mean that a typical bowl of water with a splash of household vinegar will remove more than half of the pesticide residues on produce.

So how should you wash fruit and vegetables at home?

The practical conclusion is not that washing is pointless. The review describes household washing as an accessible measure that can help reduce dietary pesticide exposure.

In the United States, the FDA recommends washing produce thoroughly under running water before preparing or eating it. It does not recommend washing fruit and vegetables with soap, detergent or commercial produce washes.

For firm produce such as melons and cucumbers, the FDA also recommends scrubbing with a clean produce brush. Produce should be washed even when the peel will not be eaten, so dirt and bacteria are not transferred from the outside when it is cut or peeled.

In the UK, food-safety guidance likewise recommends washing fruit and vegetables. Washing may help remove residues of certain pesticides, but systemic pesticides can be present within the produce and therefore cannot all be removed by washing or peeling.

Does finding a pesticide residue mean the food is unsafe?

No. A measurable residue and a residue above a legal limit are not the same thing.

For readers in the European market, including the UK context when comparing European data, the latest EFSA report published in May 2026 found that 98.8% of the 9,842 samples in the EU-coordinated 2024 programme complied with EU legislation. No measurable pesticide residues were found in 43.1%, while 54.5% contained one or more residues within maximum residue levels.

EFSA concluded that the estimated exposure to pesticide residues in the foods tested represented a low risk to consumer health.

Pesticides and washing: what to remember

Washing can reduce pesticide residues, but it cannot be relied upon to remove them all. How much is removed depends on the pesticide, the produce, where the residue is located and how the food is washed.

Baking soda and vinegar produced greater reductions than plain water in several experiments, but the conditions used in the studies do not always represent normal household use. Those figures should not be turned into promises about what a home soak will achieve.

For everyday use, washing fruit and vegetables remains a sensible step. The realistic expectation is reduction of some accessible residues, not a guarantee of pesticide-free produce.

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