[Home](/)/[Resources](/resources)/California Prop 65 Compliance USState Regulation # California Prop 65 Compliance California's Proposition 65 requires businesses to provide warnings about significant exposures to chemicals that cause cancer, birth defects, or reproductive harm. Understanding warning requirements, safe harbor levels, and compliance obligations is essential for products sold in California. Copy Link[Share on WhatsApp](https://wa.me/?text=https%3A%2F%2Fkrono-labs.com%2Fguides%2Fcalifornia-prop65-compliance) At a glance Warning types 3 Key concepts 4 Compliance steps 6 ## Types of Prop 65 warnings ### Consumer Product Warning Required for consumer products that expose users to listed chemicals above safe harbor levels. Must include specific warning language and the chemical name. Format: WARNING: This product can expose you to \[chemical name\], which is known to the State of California to cause \[cancer/birth defects/reproductive harm\]. Placement: Product label, packaging, or point of sale display ### Environmental Warning Required for environmental exposures to listed chemicals, such as discharges to drinking water sources or air emissions. Format: WARNING: This area contains \[chemical name\], known to the State of California to cause \[cancer/birth defects/reproductive harm\]. Placement: Signage at exposure location ### Occupational Warning Required for workplace exposures to listed chemicals above safe harbor levels where employees may be exposed. Format: WARNING: This product/area can expose you to \[chemical name\], known to the State of California to cause \[cancer/birth defects/reproductive harm\]. Placement: Workplace signage, product labels, or training materials ## Key Prop 65 concepts ### Listed Chemicals Prop 65 maintains a list of chemicals known to cause cancer, birth defects, or reproductive harm. The list is updated annually and currently contains over 900 chemicals. ### Safe Harbor Levels OEHHA establishes safe harbor levels (No Significant Risk Levels for carcinogens, Maximum Allowable Dose Levels for reproductive toxicants). Exposures below these levels do not require warnings. ### Proposition 65 Enforcement Private citizens and organizations can enforce Prop 65 through lawsuits. Settlements can include penalties, attorney fees, and reform of warning practices. ### Short-Form Warning Option For consumer products, a short-form warning is available that uses generic language without listing specific chemicals, but requires a website or QR code with more information. ## Compliance process steps 01 Identify applicable chemicals Review your product formulation, materials, and manufacturing processes to identify any Prop 65-listed chemicals that may be present. 02 Assess exposure levels Conduct exposure assessments or use conservative assumptions to determine if exposure exceeds safe harbor levels for any listed chemicals. 03 Determine warning requirement If exposure exceeds safe harbor levels, a Prop 65 warning is required. If below, no warning is needed (but maintain documentation). 04 Choose warning format Select appropriate warning format (full text or short-form) based on product type and exposure scenario. 05 Implement warnings Apply warnings to product labels, packaging, signage, or other appropriate locations as required by the regulation. 06 Maintain documentation Keep exposure assessments, chemical analysis reports, and warning implementation records to defend against potential enforcement actions. ## Common compliance mistakes Assuming small quantities don't require warnings - exposure levels, not just presence, determine requirements Using outdated warning language - Prop 65 warning requirements changed significantly in 2018 Not updating warnings when chemicals are added to the Prop 65 list - the list is updated annually Missing warnings for components or materials from suppliers - you're responsible for the final product Inadequate documentation of exposure assessments - enforcement actions require evidence of compliance efforts Ignoring short-form warning limitations - not all products qualify for the short-form option ## Frequently asked questions ### Does Prop 65 apply only to California? Prop 65 is a California law, but it effectively applies nationwide because products sold in California must comply. Most manufacturers apply Prop 65 warnings to all products sold in the US rather than maintaining separate inventory for California. This avoids shipping non-compliant products to California by mistake. ### What is the safe harbor level and how is it determined? Safe harbor levels are exposure thresholds below which warnings are not required. For carcinogens, it's the No Significant Risk Level (NSRL) - exposure that results in not more than one excess case of cancer per 100,000 people over 70 years. For reproductive toxicants, it's the Maximum Allowable Dose Level (MADL) - exposure with no observable effect at 1,000 times the level. ### Can I use the short-form warning for my product? The short-form warning is available for most consumer products but has limitations. It cannot be used for food, dietary supplements, alcoholic beverages, tobacco products, or environmental/occupational exposures. It also requires providing a website or QR code with more detailed chemical information. Check current OEHHA guidance for eligibility. ### What happens if I don't provide Prop 65 warnings? Failure to provide required warnings can result in enforcement actions by private parties or the California Attorney General. Penalties can be up to $2,500 per day per violation, plus attorney fees. Settlements often include significant payments and requirements to reform warning practices. Compliance is far less expensive than enforcement. ### How often is the Prop 65 chemical list updated? The Prop 65 list is updated at least annually by OEHHA. Chemicals can be added through various mechanisms including listing by authoritative bodies (IARC, NTP, EPA) or through OEHHA's own determination process. You must monitor list updates and assess whether new listings affect your products. **Disclaimer:** This guide provides general information about Prop 65 requirements. Chemical-specific determinations require exposure assessment and analysis of current OEHHA guidance. Always verify current requirements with OEHHA resources or qualified compliance professionals. πŸ‡ΊπŸ‡Έ US roadmap for your product Every standard, document, and test that applies β€” free, no account required. See your free roadmap[ Want an expert to take your product through πŸ‡ΊπŸ‡Έ US compliance for you? One consultant from Krono's compliance team takes your product from requirements to legal sale, with a fixed quote before any work starts. See compliance services](/services) Learn this properly In-depth course that teaches the full process, not just this one answer. [Start the course β€” $149](/courses/31-california-prop-65-compliance-electronics-manufacturers)[Prefer to read? Get the book β€” $24.99](/books/31-california-prop-65-compliance-electronics-manufacturers) Related guides * [US Market Compliance OverviewComprehensive overview of US regulatory landscape: FCC, FDA, CPSC, EPA, OSHA, DOE, FTC requirements for market entry.](/guides/us-market-compliance-overview) * [US State-Specific ComplianceComplete guide to US state-specific compliance.](/guides/us-state-specific-compliance) * [EPA Chemical RegulationComplete guide to EPA chemical regulation.](/guides/epa-chemical-regulation) * [US Environmental ComplianceComplete guide to US environmental compliance.](/guides/us-environmental-compliance)