--- title: An Introduction to California Proposition 65 description: Understand California Proposition 65 compliance and learn how Source Intelligence helps companies manage chemical risks and meet warning requirements. image: https://blog.sourceintelligence.com/hubfs/Prop%2065%20E-Book%20Blog%20Hero.jpg --- ![shape background](https://blog.sourceintelligence.com/hubfs/raw_assets/public/Sourceintelligence_April2024/images/headertop.png) [ChainPoint and Compliance Map are now part of Source Intelligence](https://blog.sourceintelligence.com/tag/news) - [Source Academy](https://academy.sourceintelligence.com/?_gl=1*1gjeg4j*_ga*MTEwNzA5MDU1MS4xNzEzMzI4MDE3*_ga_X53KHMS0FW*MTcxMzMyODAxNy4xLjEuMTcxMzMzMzAyMS40OC4wLjA.) - [Careers](https://www.sourceintelligence.com/careers) - [Events](https://www.sourceintelligence.com/events) - [Contact](https://www.sourceintelligence.com/contact) - Log in - [Source Intelligence login](https://app.sourceintelligence.com/portico/?_gl=1*1obc0zd*_ga*MTEwNzA5MDU1MS4xNzEzMzI4MDE3*_ga_X53KHMS0FW*MTcxMzMyODAxNy4xLjEuMTcxMzMzMzAyMS40OC4wLjA.#/) - 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[Medical Devices](https://www.sourceintelligence.com/medical-device-manufacturing) - [Retail & Consumer Packaged Goods](https://www.sourceintelligence.com/retail-consumer-packaged-goods) - [Standards & Sector Initiatives](https://www.sourceintelligence.com/chainpoint-solutions) - [Resource center](https://blog.sourceintelligence.com) - [Careers](https://www.sourceintelligence.com/careers) - [Contact](https://www.sourceintelligence.com/contact) - [Source Academy](https://academy.sourceintelligence.com) - Log in - [Source Intelligence login](https://app.sourceintelligence.com/portico) - [Q-STAR login](https://qstar.qtec.us/Login/UserLogin.aspx) - [CMM login](https://profile.totalpartsplus.com/#/login) - [Parts Plus login](https://www.totalpartsplus.com/pp/login.asp) [Schedule a demo](https://www.sourceintelligence.com/schedule-a-demo) ![](https://blog.sourceintelligence.com/hubfs/Prop%2065%20E-Book%20Blog%20Hero.jpg) # An Introduction to California Proposition 65 Published by [Source Intelligence](https://blog.sourceintelligence.com/author/source-intelligence) on December 13, 2022 at 5:08 PM ## A complete guide to understanding and complying with California Prop 65 > [Download the e-book](https://blog.sourceintelligence.com/introduction-to-california-proposition-65-ebook#download-the-e-book) to get a clear, practical overview of California Proposition 65 and what it means for your business. > > You’ll learn how Prop 65 defines chemical exposure, where risks typically emerge, and how warning obligations apply across products, workplaces, and residential settings. The e-book breaks down how OEHHA manages the chemical list, why new substances are added each year, and what companies must do to stay compliant and avoid costly penalties. You’ll also see how stronger chemical tracking and supplier transparency help teams protect consumers, reduce legal exposure, and streamline compliance work. For more insights, explore additional resources from Source Intelligence. ## Introduction California Proposition 65 is a state law that affects California businesses and companies operating in California. It applies to all products sold within the state, as well as residential and workplace areas. Complying with the law protects businesses from steep fines, expensive lawsuits, and potential reputational damage. ## California Proposition 65 basics ### Defining Prop 65 and what It means for companies Proposition 65—commonly referred to as [Prop 65](https://oehha.ca.gov/proposition-65/about-proposition-65)—is officially known as the Safe Drinking Water & Toxic Enforcement Act of 1986. It was introduced as a ballot initiative and enacted in November 1986. Under the act, companies are required to warn California citizens about potential exposure to chemicals known to cause cancer, birth defects, or other reproductive harm. Additionally, companies are prohibited from knowingly releasing harmful chemicals into any source of drinking water. The purpose of Prop 65 is to protect the public health of Californians and the environment by reducing exposure to harmful chemicals and educating individuals about the dangers of exposure. ### Exposure to Prop 65 chemicals Chemicals in the scope of Prop 65 can be present in household or workplace products, as well as in products that release the chemicals into the environment. For products, exposure occurs when an item is used or consumed. For environments, exposure occurs in homes or rental housing units, workplaces, or public areas. Regardless of how the exposure occurs, businesses must warn individuals of the risk. For example, if a landscaping business uses pesticides on the Prop 65 chemical list, it must notify both its employees and customers of the potential exposure and associated health impacts. Another example is a property owner providing pamphlets to residents of a rental housing unit if they may be exposed to one or more chemicals listed chemicals in the building itself or on the property grounds. ### Prop 65 administration The California Office of Health Hazard Assessment (OEHHA), which is part of the California Environmental Protection Agency (CalEPA), administers Prop 65. The organization is responsible for identifying chemicals that require oversight, maintaining a list of said chemicals, and developing the warning requirements mandated by Prop 65. ### Prop 65 chemical list All chemicals within the scope of Prop 65 are included in the Proposition 65 chemical list, which is managed and annually published by the California OEHHA. The list currently contains over 900 chemicals, with more added each year.  Chemicals listed under Prop 65 include both naturally occurring and synthetic chemicals that are present in food, drugs, consumer products, dyes, solvents, and pesticide additives or ingredients. Some of the chemicals are used in construction or manufacturing, while others are byproducts of chemical processes. ## Keep reading: Download the e-book ### About the author #### Source Intelligence ![Source Intelligence](https://blog.sourceintelligence.com/hs-fs/hubfs/Icon_Logo%20(1).png?width=165&height=182&name=Icon_Logo%20(1).png) [Source Intelligence](https://www.linkedin.com/company/source-intelligence) is a leading provider of supply chain compliance software. It helps global manufacturers manage product compliance, responsible sourcing, and risk across complex supply chains. Its AI-powered, configurable SaaS platform connects supplier, product, and regulatory data to identify risk at the product, component, and material level. This delivers precise, defensible insights that support faster, more confident compliance decisions.   --- Tags: [E-Books & Guides](https://blog.sourceintelligence.com/tag/e-books-guides) [Back to Blog](https://blog.sourceintelligence.com) ## Related Articles ## [California Prop 65 Compliance Basics: Labeling Requirements and Chemical List Updates](https://blog.sourceintelligence.com/what-is-california-proposition-65) California Proposition 65, commonly referred to as Prop 65, is one of the most visible chemical... [Read More](https://blog.sourceintelligence.com/what-is-california-proposition-65) ## [Google Operationalizes Safer Chemistry in Product Design](https://blog.sourceintelligence.com/google-operationalizes-safer-chemistry-in-product-design) How hazard data and workflow integration enable proactive, safer material decisions at scale [Read More](https://blog.sourceintelligence.com/google-operationalizes-safer-chemistry-in-product-design) ## [Getting Ahead of Chemical Compliance Risk](https://blog.sourceintelligence.com/getting-ahead-of-chemical-compliance-risk-proactive-strategies-for-safer-supply-chains-and-product-compliance) Chemical compliance is becoming harder to manage through reactive processes alone. Regulatory lists... 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