California Prop 65: Overview, Recent

Updates, and Solutions for Compliance

California Proposition 65 prohibits the sale of a product in California which knowingly and intentionally exposes an individual to a California Office of Environmental Health Hazard Assessment (OEHHA) listed chemical without a specific stated warning.


The webinar featured two regulatory experts who provided background on the legal aspects, compliance examples, and recent notices of proposed rulemaking. California Prop 65 is an important topic that involves legal, regulatory, and quality considerations, as companies can face serious penalties for violations. California Prop 65 can also spawn significant litigation.



Attendees will gain insight into:

  • The regulatory and legal background on California Prop 65
  • How chemicals are added to the California OEHHA list
  • Considerations for warning placement and labeling
  • Examples of Safe Harbor Level (SHL) testing for Prop 65 compliance
  • Recent notices of proposed rulemaking on "short form" warning statements

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Meet the Speakers:


Julie Holt

Director, Global Advisory Services - Decernis


Julie Holt is a subject matter expert in the areas of food, food ingredients, additives, and supplements. Ms. Holt has more than 23 years of regulatory experience in the food and food ingredients industries and managed her own advisory firm, Scientific & Regulatory Solutions LLC, prior to joining Decernis.  As a consultant, Julie supported several food and beverage clients including a Fortune 50 company. Julie has provided global regulatory knowledge covering more than 200 countries. Her consulting efforts have supported global regulatory needs, R&D projects, sustainability goals, and innovation initiatives. Julie holds a Bachelor of Science in biology (emphasis in cellular / molecular biology) and organic chemistry and a master’s certificate in international food law from Michigan State University. She has also completed 30 hours of graduate studies in comparative biology and genetics and continues graduate studies, currently in pharmacology and clinical chemistry courses.


John B. Atwater, PhD

Principal Consultant - Ataqua Regulatory Services, LLC ; and Scientific and Regulatory Affairs Project Manager - Decernis


John B. Atwater has over 30 years of experience in analytical chemistry, quality assurance and healthcare product development. Dr. Atwater is currently the principal consultant at Ataqua Regulatory Services, and a scientific and regulatory affairs project manager at Decernis. Prior to his current role, John worked at the United States Pharmacopeia (USP) for 19 years, most recently as senior director of USP’s verification programs. Dr. Atwater helped develop and implement the most stringent national/international verification program for dietary supplements, dietary ingredients, pharmaceutical excipients and active pharmaceutical ingredients. Dr. Atwater earned his Bachelor of Arts in chemistry from the Colorado College, and his PhD in analytical chemistry from Colorado State University. He is a Regulatory Affairs Certified (RAC) professional, member of the Regulatory Affairs Professional Society (RAPS), Certified Quality Auditor (CQA) and member of the American Society for Quality (ASQ).

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