In the ever-heated debate on food quality, the annual publication of the Environmental Working Group’s (EWG) Pesticide Guide continues to offer a useful reading tool for navigating the shelves. The 2026 edition, in addition to reporting the products most exposed to pesticides, highlights an often overlooked and somewhat reassuring fact, which sees a range of fruit and vegetables presenting very low levels of contamination.
In fact, alongside the well-known Dirty Dozen, the Clean Fifteen takes shape, a selection of fifteen fruit and vegetable products which, according to analyses, are among the least contaminated of all.
The investigation is based on over 54,000 samples relating to 47 types of products, examined using data from the United States Department of Agriculture (USDA). Each sample is treated as it would happen in the home: washed, peeled or rubbed carefully, so as to provide a realistic picture of exposure to chemical residues.
The criteria used to construct the ranking remain four: quantity of pesticides detected, number of different substances present, frequency of contamination and level of toxicity. A methodological system which, from 2025, gives greater weight to the danger of the molecules identified.
Overall, the results highlight the presence of 264 different pesticides in the analyzed samples. A significant portion is concentrated in the Dirty Dozen, while the Clean Fifteen stands out for its decidedly more contained contamination.
Pineapple and avocado: the “safest” products of 2026
What emerges most clearly in the list of least contaminated products are pineapple and avocado, followed by sweet corn. In these cases, analyzes show extremely low residue levels, often below the detection threshold.
In many samples belonging to the Clean Fifteen no measurable traces of pesticides appear. Overall, almost 60% of the products included in this list are free of detectable residues, a figure that offers a more reassuring outlook than the general average.
The reason for this lower exposure lies in very specific biological factors. Thick, inedible peels, as in the case of pineapple or avocado, provide a natural barrier against the absorption of chemicals. In other cases, an inherent resistance to parasites comes into play, reducing the need for intensive treatments.
The Clean Fifteen 2026: The Complete List
Here are the fifteen products that, according to the EWG report, have the lowest levels of contamination:
A selection that includes both fruit and vegetables and which, in most cases, offers natural protection against pesticides, reducing the likelihood of residue accumulation.
PFAS: reduced but not absent presence
The 2026 edition also introduces a new element in the analysis, namely the evaluation of PFAS, the now famous chemical substances characterized by exceptional persistence in the environment.
If in the Dirty Dozen over 60% of the samples have traces of these compounds, in the Clean Fifteen their presence appears more limited. This does not mean total absence, but a lower frequency, which helps make these products a more prudent choice.
PFAS are defined as “eternal substances” due to their ability to persist for a long time in soils, waters and living organisms. Research conducted by the Environmental Protection Agency links exposure to several health risks, including cancers, hormonal disorders, thyroid problems, increased cholesterol and weakened immune systems.
Comparison with the Dirty Dozen
The contrast between the two lists is clear. On the one hand there are foods such as spinach and kale, characterized by a high concentration of pesticides and a strong variability of chemical substances. On the other hand, products emerge which, in most cases, do not show detectable residues.
The differences depend largely on physical characteristics and agricultural practices. The most exposed crops require frequent treatments and have surfaces that are more vulnerable to absorption. On the contrary, Clean Fifteen products benefit from a natural protection that limits contamination.
It should be emphasized that the data refers to the US context, based on USDA analyses. European regulations follow different, often more stringent, criteria, but the trends relating to the accumulation of pesticides remain comparable.
Here is the full list of the 2026 Dirty Dozen:
Criticism from producers
The EWG’s findings continue to spark reactions from the agricultural sector. The Alliance for Food and Farming (AFF) disputes the interpretation of the data, claiming that more than 99% of the samples analyzed fall within the safety limits established by the Environmental Protection Agency. According to the organization, more than 42% of products have no detectable residues, a figure that would confirm the overall safety of the supply chain. A study from the Journal of Toxicology is also cited which excludes concrete benefits for consumers deriving from choosing organic products over conventional ones, in terms of risk.
A further element of discussion concerns the consequences on consumption. Data from the Centers for Disease Control and Prevention indicates that only a minority of the US population eats adequate amounts of fruits and vegetables. According to the AFF, the spread of rankings such as the Dirty Dozen could especially discourage the most economically fragile groups, leading to a reduction in purchases.
The EWG, for its part, insists on the importance of considering cumulative exposure to multiple substances, including PFAS, a variable that remains poorly explored in current legislation.
How to orient yourself in the choice
The message shared by the experts remains clear: fruit and vegetables must continue to play a central role in daily nutrition. For those who want to reduce exposure to pesticides, an effective strategy is to favor Clean Fifteen products when purchasing conventional foods. Alternatively, for more exposed foods, it may be useful to move towards organic.
Thorough washing under running water is always a valid precaution, even in the case of less contaminated products. A simple habit that helps to further limit the presence of surface residues.
