Costco: pesticide residue samples

104 samples bought at Costco by the UK government's residue programme since 2020. 68 had a detectable residue; 1 were above the legal limit.

Month	Product	Origin	Brand	Residues found (mg/kg)
2026-07	French beans (with pods)	Guatemala	Alpine Fresh	chlorothalonil 0.02 (MRL = 0.01); cypermethrin (sum) 0.02 (MRL = 0.7); methamidophos 0.07 (MRL = 0.01)
2026-06	Potatoes	United Kingdom	Garden of Elveden	none found
2026-06	Sweet Delight Lychees	China	—	2,4-D (partial sum) 0.01 (MRL = 0.05); bifenthrin 0.03 (MRL = 0.01); buprofezin 0.02 (MRL = 0.01); carbendazim (sum) 0.04 (MRL = 0.1); chlorfenapyr 0.07 (MRL = 0.01); chlorfluazuron 0.03 (MRL = 0.01); chlorpyrifos 0.03 (MRL = 0.01); clothianidin 0.02 (MRL = 0.01); chlorantraniliprole 0.1 (MRL = 0.01); cypermethrin (sum) 0.1 (MRL = 2); cyazofamid 0.05 (MRL = 0.01); deltamethrin 0.06 (MRL = 0.01); diflubenzuron 0.1 (MRL = 0.01); difenoconazole 0.1 (MRL = 0.3); dimethomorph 0.2 (MRL = 0.01); dithiocarbamates 0.4 (MRL = 0.05); famoxadone 0.03 (MRL = 0.01); imidacloprid 0.02 (MRL = 0. over limit
2025-11	Mangoes	Brazil	—	azoxystrobin 0.2 (MRL = 4); fludioxonil 0.09 (MRL = 7)
2025-11	Spinaches	United Kingdom	Florette	chlorate 0.4 (MRL = 0.7); Fosetyl-Al (sum) 2.2 (MRL = 300); lambda-cyhalothrin 0.04 (MRL = 0.7); mandipropamid 0.02 (MRL = 25)
2025-10	Strawberries	Netherlands	Sweet and Sunny	boscalid 0.2 (MRL = 6); cyflumetofen 0.3 (MRL = 0.6); fluopyram 0.2 (MRL = 2); pyraclostrobin 0.04 (MRL = 1.5)
2025-09	Table grapes	Spain	—	boscalid 0.3 (MRL = 5); cyantraniliprole 0.06 (MRL = 1.5); cyazofamid 0.2 (MRL = 2); ethephon 0.2 (MRL = 1)
2025-09	Table grapes	Spain	—	boscalid 0.3 (MRL = 5); cyantraniliprole 0.06 (MRL = 1.5); cyazofamid 0.2 (MRL = 2); ethephon 0.2 (MRL = 1)
2025-09	Strawberries	United States	Well Pict	boscalid 0.3 (MRL = 6); cyflumetofen 0.02 (MRL = 0.6); cyprodinil 0.05 (MRL = 5); flonicamid (sum) 0.1 (MRL = 0.03*); fludioxonil 0.04 (MRL = 4); myclobutanil 0.03 (MRL = 1); Novaluron 0.02 (MRL = 0.5); pyraclostrobin 0.1 (MRL = 1.5)
2025-08	Black Figs	Türkiye	Alya Fruit	none found
2025-08	Platibelle Flat Peaches	Spain	Margot & Mabel's	deltamethrin 0.01 (MRL = 0.15); fludioxonil 0.7 (MRL = 10)
2025-07	Black Mission Figs	Peru	Athos	none found
2025-07	Black Mission Figs	Peru	Athos	none found
2025-07	Flat Candy Peaches	Spain	Margot & Mabel's	tebuconazole 0.02 (MRL = 0.6)
2025-06	Black Mission Figs	Peru	Athos	none found
2025-05	Evita Figs	South Africa	Star South Fruits	none found
2025-05	Table grapes	Chile	—	boscalid 0.2 (MRL = 5); pyrimethanil 0.9 (MRL = 5); fenhexamid 0.2 (MRL = 15); flubendiamide 0.09 (MRL = 2); metrafenone 0.06 (MRL = 7)
2025-05	Table grapes	Chile	—	boscalid 0.2 (MRL = 5); flubendiamide 0.09 (MRL = 2); fenhexamid 0.2 (MRL = 15); metrafenone 0.06 (MRL = 7); pyrimethanil 0.9 (MRL = 5)
2025-05	Romaine Hearts Lettuce	Spain	—	acetamiprid 0.01 (MRL = 1.5); Fosetyl-Al (sum) 1.8 (MRL = 300); Spirotetramat (partial sum) 0.02 (MRL = 7)
2025-05	Spinaches	United Kingdom	Florette	boscalid 0.01 (MRL = 50); chlorate 0.07 (MRL = 0.7); Fosetyl-Al (sum) 2.6 (MRL = 300); lenacil 0.2 (MRL = 0.1*); mandipropamid 0.9 (MRL = 25)
2025-03	Mangoes	Peru	—	fludioxonil 0.2 (MRL = 7); lambda-cyhalothrin 0.009 (MRL = 0.2)
2025-03	Tiffany White Flesh Nectarines	South Africa	Devour/Delecta	fludioxonil 0.7 (MRL = 10)
2025-01	Chopped Tomatoes	Italy	Valfrutta	boscalid 0.03 (MRL = 0.21); fluazifop-p (sum) 0.03 (MRL = 0.06); Spirotetramat (partial sum) 0.02 (MRL = 2)
2024-11	Organic Ginger	Peru	Apollo	none found
2024-11	Organic Ginger	Peru	Apollo	none found
2024-11	Purple Sprouting Broccoli	United Kingdom	Beonna Fresh	Spirotetramat (partial sum) 0.06 (MRL = 1); triallate 0.03 (MRL = 0.1*)
2024-11	Piel de Sapo Melon	Brazil	Melon King	azoxystrobin 0.01 (MRL = 1)
2024-11	Broccoli	United Kingdom	Beonna Fresh	Spirotetramat (partial sum) 0.06 (MRL = 1); triallate 0.03 (MRL = 0.1*)
2024-11	Piel de Sapo Melon	Brazil	Melon King	azoxystrobin 0.01 (MRL = 1)
2024-10	Table grapes	Spain	Griffin & Brand	acetamiprid 0.1 (MRL = 0.5); cyprodinil 0.8 (MRL = 3); cyazofamid 0.2 (MRL = 2); deltamethrin 0.02 (MRL = 0.2); ethephon 0.3 (MRL = 1); fludioxonil 0.1 (MRL = 5); fenpyroximate 0.04 (MRL = 0.3); fluxapyroxad 0.2 (MRL = 3); fluopyram 0.3 (MRL = 1.5); spinosad (sum) 0.02 (MRL = 0.5)
2024-10	Baby Eggplants	Holland (the Netherlands)	Sunset	cyantraniliprole 0.02 (MRL = 1)
2024-10	Bananas	Costa Rica	Dole	azoxystrobin 0.1 (MRL = 2); bifenthrin 0.03 (MRL = 0.1); fludioxonil 0.08 (MRL = 3); pyriproxifen 0.1 (MRL = 0.7)
2024-10	Aberdeen Angus Fillet Steak	United Kingdom	Kirkland	none found
2024-10	Cooked Beetroot	Spain	Brookerpaks	none found
2024-10	White Bread	United Kingdom	Hovis	chlormequat 0.04 (MRL = 4.97)
2024-10	12 Traditional Naan	United Kingdom	Santosh	glyphosate 0.08 (MRL = 1.2)
2024-10	Organic Garlic	Spain	Brooker Pacs	none found
2024-10	Table grapes	Spain	Griffin & Brand	acetamiprid 0.1 (MRL = 0.5); cyprodinil 0.8 (MRL = 3); cyazofamid 0.2 (MRL = 2); deltamethrin 0.02 (MRL = 0.2); ethephon 0.3 (MRL = 1); fludioxonil 0.1 (MRL = 5); fenpyroximate 0.04 (MRL = 0.3); fluxapyroxad 0.2 (MRL = 3); fluopyram 0.3 (MRL = 1.5); spinosad (sum) 0.02 (MRL = 0.5)
2024-10	Manuka Honey	New Zealand	Queen Bee	none found
2024-10	Fresh Limes Goldcup	Brazil	Goldcup	azoxystrobin 0.01 (MRL = 15); imazalil 0.9 (MRL = 5); malathion (sum) 0.1 (MRL = 2); sulfoxaflor 0.01 (MRL = 0.01*); tebuconazole 0.04 (MRL = 5)
2024-10	Piel de Sapo Melon	Spain	el Abuelo	none found
2024-10	Cravendale Whole Milk	United Kingdom	Arla	none found
2024-10	Sweet Bell Peppers	Netherlands	Sunset	cyantraniliprole 0.02 (MRL = 1.5); flonicamid (sum) 0.04 (MRL = 0.3); propamocarb (sum) 0.06 (MRL = 3); pyridalyl 0.02 (MRL = 2)
2024-10	Baby Eggplants	Holland (the Netherlands)	Sunset	cyantraniliprole 0.02 (MRL = 1)
2024-10	Bananas	Costa Rica	Dole	azoxystrobin 0.1 (MRL = 2); bifenthrin 0.03 (MRL = 0.1); fludioxonil 0.08 (MRL = 3); pyriproxifen 0.1 (MRL = 0.7)
2024-10	Aberdeen Angus Fillet Steak	United Kingdom	Kirkland	none found
2024-10	Cooked Beetroot	Spain	Brookerpaks	none found
2024-10	White Bread	United Kingdom	Hovis	chlormequat 0.04 (MRL = 4.97)
2024-10	12 Traditional Naan	United Kingdom	Santosh	glyphosate 0.08 (MRL = 1.2)
2024-10	Organic Garlic	Spain	Brooker Pacs	none found
2024-10	Table grapes	Spain	Griffin & Brand	acetamiprid 0.1 (MRL = 0.5); cyprodinil 0.8 (MRL = 3); cyazofamid 0.2 (MRL = 2); deltamethrin 0.02 (MRL = 0.2); ethephon 0.3 (MRL = 1); fludioxonil 0.1 (MRL = 5); fenpyroximate 0.04 (MRL = 0.3); fluxapyroxad 0.2 (MRL = 3); fluopyram 0.3 (MRL = 1.5); spinosad (sum) 0.02 (MRL = 0.5)
2024-10	Manuka Honey	New Zealand	Queen Bee	none found
2024-10	Limes	Brazil	Goldcup	azoxystrobin 0.01 (MRL = 15); imazalil 0.9 (MRL = 5); malathion (sum) 0.1 (MRL = 2); sulfoxaflor 0.01 (MRL = 0.01*); tebuconazole 0.04 (MRL = 5)
2024-10	Piel de Sapo Melon	Spain	el Abuelo	none found
2024-10	Cravendale Whole Milk	United Kingdom	Arla	none found
2024-10	Sweet Bell Peppers	Netherlands	Sunset	cyantraniliprole 0.02 (MRL = 1.5); flonicamid (sum) 0.04 (MRL = 0.3); propamocarb (sum) 0.06 (MRL = 3); pyridalyl 0.02 (MRL = 2)
2024-09	Bananas	Colombia	Dole	fenpropidin 0.01 (MRL = 0.2)
2024-09	Chili peppers	Rwanda	—	none found
2024-09	Bananas	Colombia	Dole	fenpropidin 0.01 (MRL = 0.2)
2024-08	Baby Eggplant	Holland (the Netherlands)	—	none found
2024-08	Broccoli	United Kingdom	Tenderstem	indoxacarb 0.06 (MRL = 0.3)
2024-08	Habanero Shazam Peppers	Spain	Sunset	abamectin (sum) 0.06 (MRL = 0.07); sulfoxaflor 0.02 (MRL = 0.4)
2024-08	Baby Eggplant	Holland (the Netherlands)	—	none found
2024-08	Tenderstem Broccoli	United Kingdom	Tenderstem	indoxacarb 0.06 (MRL = 0.3)
2024-08	Cavendish Bananas	Costa Rica	Dole	azoxystrobin 0.2 (MRL = 2); bifenthrin 0.02 (MRL = 0.1); fludioxonil 0.2 (MRL = 3); pyriproxifen 0.1 (MRL = 0.7)
2024-08	Capsicum Sweet Peppers	Netherlands	Sunset	cyantraniliprole 0.01 (MRL = 1.5); propamocarb (sum) 0.03 (MRL = 3)
2024-08	Cavendish Bananas	Costa Rica	Dole	azoxystrobin 0.2 (MRL = 2); bifenthrin 0.02 (MRL = 0.1); fludioxonil 0.2 (MRL = 3); pyriproxifen 0.1 (MRL = 0.7)
2024-08	Capsicum Sweet Peppers	Netherlands	Sunset	cyantraniliprole 0.01 (MRL = 1.5); propamocarb (sum) 0.03 (MRL = 3)
2024-07	Table grapes	Egypt	—	cyprodinil 0.08 (MRL = 3); ethephon 0.1 (MRL = 1); fludioxonil 0.02 (MRL = 5); Fosetyl-Al (sum) 7.8 (MRL = 100)
2024-07	Broccoli	United Kingdom	Barfoots Farms	none found
2024-07	Table grapes	Egypt	—	cyprodinil 0.08 (MRL = 3); ethephon 0.1 (MRL = 1); fludioxonil 0.02 (MRL = 5); Fosetyl-Al (sum) 7.8 (MRL = 100)
2024-07	Tenderstem Broccoli	United Kingdom	Barfoots Farms	none found
2024-07	Table grapes	Egypt	—	cyprodinil 0.08 (MRL = 3); ethephon 0.1 (MRL = 1); fludioxonil 0.02 (MRL = 5); Fosetyl-Al (sum) 7.8 (MRL = 100)
2024-07	French beans (with pods)	Guatemala	—	none found
2024-07	French beans (with pods)	Guatemala	—	none found
2024-07	Sweet Peppers	Netherlands	—	cyantraniliprole 0.01 (MRL = 1.5); flonicamid (sum) 0.07 (MRL = 0.3); fludioxonil 0.01 (MRL = 1); propamocarb (sum) 0.07 (MRL = 3)
2024-07	French beans (with pods)	Guatemala	—	none found
2024-07	Sweet Peppers	Netherlands	—	cyantraniliprole 0.01 (MRL = 1.5); flonicamid (sum) 0.07 (MRL = 0.3); fludioxonil 0.01 (MRL = 1); propamocarb (sum) 0.07 (MRL = 3)
2024-03	Watermelon	Costa Rica	—	fludioxonil 0.04 (MRL = 0.3); Fosetyl-Al (sum) 21 (MRL = 75); thiamethoxam 0.01 (MRL = 0.15)
2024-03	Watermelon	Costa Rica	—	fludioxonil 0.04 (MRL = 0.3); Fosetyl-Al (sum) 21 (MRL = 75); thiamethoxam 0.01 (MRL = 0.15)
2023-10	Jumbo Green	New Zealand	Zespri	none found
2023-10	Kiwi fruits (green, red, yellow)	New Zealand	Zespri	none found
2023-10	Conference Pears	Belgium	—	captan (sum) 0.03 (MRL = 10); Fosetyl-Al (sum) 2.1 (MRL = 150)
2023-10	Pears	Belgium	—	captan (sum) 0.03 (MRL = 10); Fosetyl-Al (sum) 2.1 (MRL = 150)
2023-09	Organic Carrots	United Kingdom	R B Organic	none found
2023-09	Kiwi Fruit	New Zealand	—	none found
2023-09	Carrots	United Kingdom	R B Organic	none found
2023-09	Kiwi fruits (green, red, yellow)	New Zealand	—	none found
2023-05	Pears	South Africa	Orchard World	acetamiprid 0.08 (MRL = 0.4); chlorantraniliprole 0.03 (MRL = 0.5); dithiocarbamates 0.1 (MRL = 5); fenpyroximate 0.02 (MRL = 0.3); glufosinate (sum) 0.09 (MRL = 0.1); thiacloprid 0.04 (MRL = 0.3)
2023-05	Forelle Pears	South Africa	Orchard World	acetamiprid 0.08 (MRL = 0.4); chlorantraniliprole 0.03 (MRL = 0.5); dithiocarbamates 0.1 (MRL = 5); fenpyroximate 0.02 (MRL = 0.3); glufosinate (sum) 0.09 (MRL = 0.1); thiacloprid 0.04 (MRL = 0.3)
2023-03	Mandarins	Morocco	Goldcup	flonicamid (sum) 0.02 (MRL = 0.15); fludioxonil 0.2 (MRL = 10); imazalil 0.7 (MRL = 5); pyrimethanil 0.8 (MRL = 8); pyriproxifen 0.02 (MRL = 0.6); thiabendazole 0.06 (MRL = 7)
2023-03	Mandarins	Morocco	Goldcup	flonicamid (sum) 0.02 (MRL = 0.15); fludioxonil 0.2 (MRL = 10); imazalil 0.7 (MRL = 5); pyrimethanil 0.8 (MRL = 8); pyriproxifen 0.02 (MRL = 0.6); thiabendazole 0.06 (MRL = 7)
2022-10	Hass Avocados	Peru	—	none found
2022-10	French beans (with pods)	Guatemala	Alpine Fresh	captan (sum) 0.06 (MRL = 0.03*)
2022-10	Hass Avocados	Peru	—	none found
2022-10	French beans (with pods)	Guatemala	Alpine Fresh	captan (sum) 0.06 (MRL = 0.03*)
2022-09	Cerasina Final 11.3 Cherries	United Kingdom	Castleton Farm	myclobutanil 0.02 (MRL = 3); boscalid 0.1 (MRL = 5); cyprodinil 0.01 (MRL = 2); fludioxonil 0.03 (MRL = 5); fenhexamid 0.3 (MRL = 7)
2022-09	Cherries (sweet)	United Kingdom	Castleton Farm	boscalid 0.1 (MRL = 5); cyprodinil 0.01 (MRL = 2); fludioxonil 0.03 (MRL = 5); fenhexamid 0.3 (MRL = 7); myclobutanil 0.02 (MRL = 3)
2022-08	Kordia Cherries	United Kingdom	The Fruit Firm	Spirotetramat (partial sum) 0.04 (MRL = 3); boscalid 0.02 (MRL = 5); cyprodinil 0.01 (MRL = 2); cyantraniliprole 0.01 (MRL = 6)
2022-08	Strawberries	United Kingdom	Driscoll's	azoxystrobin 0.01 (MRL = 10); difenoconazole 0.01 (MRL = 2); Fosetyl-Al (sum) 1.2 (MRL = 100); fluxapyroxad 0.01 (MRL = 4)
2022-08	Cherries (sweet)	United Kingdom	The Fruit Firm	boscalid 0.02 (MRL = 5); cyprodinil 0.01 (MRL = 2); cyantraniliprole 0.01 (MRL = 6); Spirotetramat (partial sum) 0.04 (MRL = 3)
2022-08	Strawberries	United Kingdom	Driscoll's	azoxystrobin 0.01 (MRL = 10); difenoconazole 0.01 (MRL = 2); Fosetyl-Al (sum) 1.2 (MRL = 100); fluxapyroxad 0.01 (MRL = 4)
2021-07	Prity Limelon	Spain	—	flonicamid (sum) 0.06 (MRL = 0.4); propamocarb (sum) 0.03 (MRL = 5)
2021-07	Prity Limelon	Spain	—	flonicamid (sum) 0.06 (MRL = 0.4); propamocarb (sum) 0.03 (MRL = 5)

A residue below the limit is legal. The UK samples a different mix of products at each retailer, so totals do not rank retailers.