Prop 65 notice 2026-05269: C. H. Guenther & Son LLC
Clean Product Advocates, LLC filed this California Prop 65 60-day notice on November 9, 2026. It names C. H. Guenther & Son LLC and Costco Wholesale Corporation and alleges exposure to Lead from Cuisine Adventures French Onion Soup.
The violations below are alleged in a 60-day notice. They are not proven. A 60-day notice is not a lawsuit and not a finding of liability.
- AG number
- 2026-05269
- Date filed
- Noticing party
- Plaintiff attorney
- Cliffwood Law Firm, PC
- Alleged violators
- Chemicals
- Source or product
- Cuisine Adventures French Onion Soup
- Official notice
- Notice PDF at oag.ca.gov
- Official record
- Attorney General record for 2026-05269
- Last checked
- November 11, 2026
Other notices naming C. H. Guenther & Son LLC
- C. H. Guenther & Son LLC and 1 more: Fumonisin B1 in Great Value Yellow Corn MealNotice 2026-04718, filed 2026-10-02 by Environmental Health Advocates, Inc.
- C. H. Guenther & Son LLC and 2 more: Lead in Patti’s Good Life Buttermilk Pancake & Waffle MixNotice 2026-02197, filed 2026-05-11 by Clean Product Advocates, LLC
Recent notices filed by Clean Product Advocates, LLC
- Lee Kum Kee (U.S.A.) Inc. and 1 more: Lead in Lee Kum Kee Char Siu SauceNotice 2026-05272, filed 2026-11-09 by Clean Product Advocates, LLC
- Pasco Foods, Inc. and 1 more: Lead in Golden Farms Pineapple ChunksNotice 2026-05271, filed 2026-11-09 by Clean Product Advocates, LLC
- Tawa Supermarket, Inc.: Cadmium, Lead in Gai Lan MuiNotice 2026-05270, filed 2026-11-09 by Clean Product Advocates, LLC
- Borges USA, Inc. and 1 more: Lead in Cara Mia Italian Style Tomato Bruschetta with Basil and GarlicNotice 2026-05268, filed 2026-11-09 by Clean Product Advocates, LLC
- Borges USA, Inc. and 1 more: Cadmium, Lead in Cara Mia California Style Artichoke BruschettaNotice 2026-05267, filed 2026-11-09 by Clean Product Advocates, LLC