The Dirty Dozen is an annual list of the 12 fruits and vegetables with the highest levels of pesticide residues, published by the Environmental Working Group (EWG). Since 1995, the EWG has ranked conventional produce based on government testing data, with the goal of helping shoppers decide which items are worth buying organic and which are fine to grab off the regular shelf.
The 2025 Dirty Dozen List
Each year the rankings shift slightly as testing catches up with changing farming practices. The 2025 list, based on samples collected and tested in 2023, ranks these 12 items as the most contaminated:
- Spinach
- Strawberries
- Kale, collard, and mustard greens
- Grapes
- Peaches
- Cherries
- Nectarines
- Pears
- Apples
- Blackberries
- Blueberries
- Potatoes
Leafy greens and berries tend to dominate the list year after year. Their large surface areas and thin or absent peels make them harder to protect from pesticide absorption during growing, and harder to clean after harvest.
Where the Data Comes From
The EWG doesn’t do its own lab testing. It pulls raw data from the USDA’s Pesticide Data Program, which tests thousands of produce samples each year for hundreds of different pesticide compounds. The samples are washed and prepared the way a consumer would before eating, so the residue levels reflect what you’d actually be exposed to at home.
Starting in 2025, the EWG added a new layer to its methodology: pesticide toxicity. Rather than just counting how many pesticides were detected and at what levels, the rankings now factor in how harmful each pesticide is. The toxicity thresholds come from the EPA’s own safety assessments, supplemented by data from the European Food Safety Authority when EPA numbers aren’t available.
The Clean Fifteen
The EWG also publishes a companion list of the 15 items with the lowest pesticide residues. These are generally produce with thick peels or husks that you remove before eating, which act as a natural barrier. The 2025 Clean Fifteen includes pineapple, sweet corn, avocados, papaya, onions, frozen sweet peas, asparagus, cabbage, watermelon, cauliflower, bananas, mangoes, carrots, mushrooms, and kiwi.
If you’re trying to stretch a grocery budget, buying conventional versions of Clean Fifteen items and saving your organic spending for Dirty Dozen items is a common strategy.
Why the List Is Controversial
The Dirty Dozen gets significant pushback from toxicologists and food scientists. The central criticism is that the list ranks produce by the number and frequency of detected pesticides but doesn’t always make clear whether those levels are anywhere near dangerous. The EPA sets legal tolerance limits for every pesticide on every crop, and USDA testing consistently finds that the vast majority of conventional produce falls well below those thresholds.
Critics argue that by flagging a strawberry as “dirty,” the list may discourage people from buying fresh produce at all, especially lower-income shoppers who can’t afford the organic option. From a public health perspective, the risk of not eating fruits and vegetables is far greater than the risk of trace pesticide exposure from conventional produce.
The EWG counters that tolerance limits are set one pesticide at a time and don’t account for the cumulative effect of eating small amounts of many different pesticides across your whole diet. That’s a legitimate gap in the regulatory framework, though it doesn’t necessarily mean the exposure is harmful.
Does Organic Produce Actually Have Less Pesticide?
Yes, and the difference is measurable in your body. Clinical trials that switched people from conventional to organic diets found that pesticide metabolites in their urine dropped by up to 90% within just a few days. Studies in children showed similar results: kids eating organic had dramatically lower levels of organophosphorus metabolites compared to those eating conventional produce.
That said, “detectable” doesn’t automatically mean “dangerous.” Organic farming also uses pesticides, just ones derived from natural sources rather than synthetic chemistry. The relevant question is whether the residue levels on conventional produce are high enough to cause harm, and on that point the scientific community is still divided.
What Pesticide Exposure Can Do
The concern isn’t about a single apple or a handful of grapes. It’s about long-term, low-level exposure over years. Organophosphates, one of the most commonly detected pesticide classes on produce, work by disrupting how nerve signals are transmitted. At high doses (think agricultural workers or accidental poisoning), they can cause muscle weakness, breathing problems, and neurological damage including memory impairment, confusion, and numbness in the extremities.
At the trace levels found on grocery store produce, the effects are far less clear. Some epidemiological studies have linked higher dietary pesticide exposure to developmental concerns in children, but isolating pesticides from all the other variables in diet and environment is extremely difficult. The honest answer is that the long-term effects of eating small amounts of many different pesticides are not fully understood.
How to Reduce Pesticide Residue at Home
Rinsing produce under running water is better than nothing, but plain water has limited effectiveness at removing certain pesticides, especially systemic ones that penetrate below the skin. A more effective approach is soaking produce in a baking soda solution. A 5% baking soda soak removed about 74% of thiabendazole (a common fungicide) from fruit surfaces in lab testing. A two-step soak, first in a cornstarch solution and then in baking soda, pushed removal rates above 90%.
In practical terms, dissolving about a teaspoon of baking soda in two cups of water and soaking your produce for 12 to 15 minutes before rinsing is a cheap, effective way to reduce surface residues. Peeling also works for items like apples and pears, though you lose fiber and nutrients in the skin.
How to Use the List
The Dirty Dozen works best as a prioritization tool, not an alarm. If you buy all organic, the list is irrelevant to you. If you buy all conventional, the list gives you a reasonable starting point for deciding where organic might be worth the price premium. Spinach, strawberries, and leafy greens consistently rank at the top, so those are the items where switching to organic makes the biggest difference in your exposure.
The most important thing, regardless of which column your produce comes from, is to eat it. Every major health organization agrees that the benefits of a diet rich in fruits and vegetables far outweigh the risks posed by pesticide residues at the levels found in the food supply.