Table of Contents

1. Key Highlights:
2. Introduction
3. How Prop 65’s private-enforcer model drives high-volume claims
4. What the June 2026 Notices reveal: categories, counts and chemical fingerprints
5. Why food products — and powdered foods in particular — drew so many notices
6. Heavy metals: why lead and cadmium remain headline targets
7. PFAS and perfluorinated chemicals: consumer products and seafood under scrutiny
8. Phthalates, bisphenols and other plasticizers: a recurrent theme in accessories and containers
9. Mycotoxins in food: aflatoxins, ochratoxin A and fumonisin B1
10. Personal care products: diethanolamine and formulation vulnerabilities
11. Where settlements and litigation intersect with commercial choices
12. Practical compliance measures: a prioritized roadmap
13. Testing strategy: how to obtain defensible results
14. Responding to a 60-day Notice: a step-by-step operational checklist
15. Litigation and defensive arguments frequently deployed
16. Emerging enforcement patterns and what to expect next
17. Real-world examples and hypotheticals (illustrative, anonymized)
18. Cost considerations: settlements, penalties and business impact
19. Regulatory intersections and cross-jurisdictional implications
20. Practical checklist: immediate actions for companies selling into California
21. Conclusion (avoidance of cliché phrasing)
22. FAQ

Key Highlights:

• California’s Proposition 65 generated 520 new or amended 60-day Notices in June 2026, with food products — especially powdered foods, ready meals, fruits/vegetables and snacks — accounting for the largest share.
• Lead and cadmium dominated the allegations across multiple product categories; PFAS, phthalates, BPA/BPS, mycotoxins and delta-9-THC also featured prominently, reflecting persistent contamination, formulation and supply-chain vulnerabilities.
• Manufacturers, retailers and brand owners must pair targeted testing and supply-chain controls with defensible warnings or product changes; failing to act can expose companies to steep daily penalties plus attorney fees.

Introduction

California’s Safe Drinking Water and Toxic Enforcement Act of 1986, commonly known as Proposition 65, remains one of the most consequential consumer-protection laws for product manufacturers, distributors and retailers that sell into California. Beyond requiring “clear and reasonable” warnings when a product exposes consumers to any of more than 900 chemicals on the state’s list, Prop 65 enables private enforcers to bring civil actions after giving a 60-day notice to the state and the alleged violator. That private enforcement mechanism creates a litigation environment in which plaintiffs’ counsel can press large numbers of claims, seek civil penalties up to $2,500 per day for each violation, and recover fees — a combination that sustains high-volume targeting.

June 2026 saw a burst of private enforcement activity: 520 new and amended Notices alleging Prop 65 violations. The notices concentrated in several predictable and some surprising product categories, and broadly implicated heavy metals, PFAS, phthalates, mycotoxins, bisphenols and even delta-9-tetrahydrocannabinol. For businesses the message is clear: the risk from Prop 65 remains active and multi-faceted. This article parses the June 2026 notices, explains why certain products are repeatedly targeted, outlines practical compliance and litigation responses, and sets out steps companies should take now to manage exposure and regulatory risk.

How Prop 65’s private-enforcer model drives high-volume claims

Prop 65’s statutory structure matters more than its health-safety aims when it comes to enforcement trends. A single statute combines:

• A list of chemicals that is publicly updated and currently totals more than 900 entries.
• A private right to enforce the law after providing a 60-day Notice to the California Attorney General and the alleged violator.
• Authority to collect civil penalties — up to $2,500 per day per violation — and to recover attorney’s fees for prevailing plaintiffs.

Those features fuel a specialized plaintiffs’ bar that files high volumes of Notices and lawsuits. For plaintiffs, the combination of statutory penalties and fee recovery can make individual matters economically attractive even when settlements are modest compared with the penalties theoretically available. For defendants, the prospect of per-day penalties plus legal costs turns even a single notice into a material commercial risk and a potential reputational burden.

The Attorney General’s publicly searchable 60-day Notice database allows monitoring of statewide enforcement trends. The June 2026 figure of 520 Notices provides a snapshot of concentrated activity across food, consumer goods and personal care products — categories that directly affect large swaths of consumers and therefore offer many targets for enforcement.

What the June 2026 Notices reveal: categories, counts and chemical fingerprints

The June data show distinct patterns in product categories and alleged chemicals. The most striking pattern is the heavy concentration of Notices against food and beverage products, followed by consumer goods and personal care items. Below is a condensed depiction of the June activity with counts drawn from the notices filed:

Food and beverage

• Powdered foods (greens, protein powders, spices, drink mixes, flours, supplements): at least 103 Notices — primarily for lead and cadmium.
• Meals and dishes (pasta, prepared dishes, sauces): at least 81 Notices — lead, cadmium and fumonisin B1.
• Fruits and vegetables (fresh/preserved mixes, dried seaweed, berries, mango, mushrooms): at least 60 Notices — lead, cadmium and aflatoxins.
• Snacks (chips, seeds, pretzels, nuts, peanut butter): at least 51 Notices for heavy metals and at least 16 Notices for aflatoxins.
• Seafood (crab, shrimp, scallops, clam chowder, tuna, sardines): at least 25 Notices for lead/cadmium and at least 9 Notices for PFOS, PFOA and mercury.
• THC-infused edibles (gummies, baked goods, tonics): at least 12 Notices alleging delta-9-THC.
• Desserts (chocolate, cookies, candy): at least 12 Notices alleging lead, cadmium and ochratoxin A.

Consumer products

• Miscellaneous consumer goods (workout gear, toys, décor): at least 45 Notices for lead and an additional 20 for phthalates and PFAS.
• Accessories (shoes, gloves, jewelry): at least 22 Notices for DBP and chromium (hexavalent compounds).
• Containers (cases, bags, purses, pouches): at least 22 Notices for DINP, DEHP and BPA.
• Household items (pans, mugs, plates, utensils): at least 20 Notices for lead.
• Tools (tweezers, cutters, welding rods): at least 12 Notices for phthalates, nickel and related compounds.
• Receipts: at least 3 Notices for bisphenol S (BPS).

Cosmetics and personal care

• Skin products (lotion, glitter, wash): at least 5 Notices alleging diethanolamine.
• Hair products (dye, shampoo, conditioner): at least 3 Notices for diethanolamine and DEHP.

Taken together, the June notices show a repeated focus on heavy metals and on compounds tied to plasticizers and performance chemicals. The presence of mycotoxins (aflatoxins, ochratoxin A, fumonisin B1) among food notices reflects both contamination risk and advanced testing capabilities that identify low levels in complex matrices. PFAS in seafood and consumer products remains a top concern. Several categories — powdered foods, containers and accessories — are being targeted in clusters, suggesting plaintiffs’ filings are informed by sampling campaigns, library testing, or targeted complaints focused on supply-chain nodes.

Why food products — and powdered foods in particular — drew so many notices

Two dynamics make many food products especially vulnerable to Prop 65 claims.

1. Ubiquity and supply-chain complexity. Foods sourced across multiple geographies aggregate contamination risks. Heavy metals like lead and cadmium are naturally occurring in soil and can accumulate in plants and shellfish. Raw materials pass through many hands, and control points can be sparse in complex supply chains.
2. Concentration effects. Powdered foods — protein powders, powdered greens, drink mixes and supplement blends — often concentrate ingredients. Drying and grinding can increase the concentration of contaminants per serving compared with fresh ingredients. A contaminant that is below concern in whole fruit or vegetable form may concentrate above a threshold when processed into powder.

Mycotoxins complicate the picture further. Aflatoxins, fumonisins and ochratoxins arise from fungal growth on crops such as grains, nuts and dried fruits if harvest, storage or handling conditions are suboptimal. Modern analytical laboratories can detect these toxins at parts-per-billion levels, and private enforcers typically use such testing to support Notices.

Seafood shows a mixed chemical fingerprint: heavy metals like mercury and cadmium reflect both environmental contamination and species-specific bioaccumulation, while PFAS detections indicate persistent industrial pollutants that accumulate in aquatic ecosystems. The presence of PFOS and PFOA in seafood Notices signals growing attention to legacy and emerging contaminants in marine food chains.

Heavy metals: why lead and cadmium remain headline targets

Lead and cadmium were the most alleged chemicals across June’s Notices. Their prevalence stems from several factors:

• Natural occurrence and environmental persistence. Both heavy metals are present in soils and water and can transfer into crops and animals. Where industrial sources contribute to environmental levels, contamination hotspots arise.
• Widespread detectability. Analytical methods for lead and cadmium are mature, sensitive and widely available. Detection at low concentrations can therefore be presented as evidence of exposure.
• Health impacts and Prop 65 listing. Both chemicals are on the Prop 65 list for their reproductive and/or carcinogenic properties, requiring warnings if exposures exceed regulatory benchmarks.

For food producers, sources of lead and cadmium include contaminated soil, irrigation water, fertilizers, processing equipment and packaging. For consumer goods, these metals can appear in metal alloys, paints, glazes, decorative trims and manufacturing residues.

Reducing risk requires targeted steps: raw-material testing; supplier qualification with metal limits; material substitutions; process controls to avoid cross-contamination; and careful selection of packaging. When contamination is detected, companies must assess exposure per a typical consumer use scenario and compare that exposure to Prop 65 thresholds (e.g., NSRLs or MADLs) to determine whether a warning is legally required.

PFAS and perfluorinated chemicals: consumer products and seafood under scrutiny

PFOS and PFOA — two legacy PFAS — appeared in several seafood notices and in consumer products. PFAS present unique challenges:

• Persistence and bioaccumulation. PFAS resist environmental degradation and can accumulate in organisms and the human body, driving regulatory and public-health attention.
• Broad uses. PFAS have been used in textiles, food-contact coatings, cookware, flame retardants and grease-resistant packaging. Their use across product types increases cross-category enforcement risk.
• Evolving regulation. California and other jurisdictions have accelerated PFAS regulatory action, including listing and limits. Plaintiffs increasingly test for PFAS as a class or for particular congeners.

Companies selling seafood should evaluate PFAS testing in species that are known to bioaccumulate these compounds, and manufacturers of consumer goods must scrutinize finishes, coatings and water- or stain-resistant treatments. Where PFAS are identified, options include reformulation, substitution to non-PFAS technologies, or documentation that exposures are below regulatory thresholds.

Phthalates, bisphenols and other plasticizers: a recurrent theme in accessories and containers

Phthalates (DINP, DEHP, DBP) and bisphenols (BPA, BPS) were central allegations in accessories, containers and receipts. These chemicals are common in flexible plastics, coatings and thermal paper:

• Phthalates are plasticizers added to impart flexibility; many are restricted or subject to limits, particularly in products for children. They can migrate from plastic into food or come into contact with skin.
• Bisphenol A and alternatives such as BPS are used in polycarbonate plastics and in thermal receipt paper as developers. BPS has emerged as an alternative chemical that is now itself subject to regulatory scrutiny.

Manufacturers and retailers must review material specifications, supplier declarations and test receipts and food-contact components. For packaging used with foods, migration testing and compliance with food-contact regulations (e.g., FDA) must be aligned with Prop 65 exposure assessments. For accessories and children’s items, consider phasing out higher-risk plasticizers and adopting phthalate-free, BPA-free materials that are documented with certificates of analysis and third-party testing.

Mycotoxins in food: aflatoxins, ochratoxin A and fumonisin B1

The presence of aflatoxins, ochratoxin A and fumonisin B1 in June Notices spotlights fungal toxins that can contaminate grains, nuts, spices and dried fruits under adverse storage or processing conditions. Key points:

• Aflatoxins and ochratoxin A: potent natural toxins produced by Aspergillus and Penicillium species; they are associated with carcinogenicity and other health risks and can survive typical food processing. Aflatoxins are a global issue in nuts, corn and certain spices.
• Fumonisin B1: associated with corn and maize products, including pastas and meal-type dishes, when fungal contamination occurs.

Food companies should maintain strict control of harvest, drying and storage conditions, implement supplier quality requirements tied to maximum acceptable mycotoxin levels, and test lots based on risk-based sampling plans. For powdered and processed foods, attention to concentration effects and batch-homogeneity in sampling is crucial: uneven contamination can produce testing variability that plaintiffs exploit.

Personal care products: diethanolamine and formulation vulnerabilities

Notices against body lotions, washes, body glitter and hair products for diethanolamine (DEA) and DEHP reflect the continuing focus on surfactant chemistry, emulsifiers and plasticizers in personal-care formulations. DEA can form nitrosamines under certain conditions and has been subject to regulatory scrutiny. DEHP, a phthalate plasticizer, is restricted in many jurisdictions for consumer goods.

Cosmetic and personal-care manufacturers should audit formulations for listed chemicals and consider substitution where possible. Product safety assessments must include ingredient inventories, supplier declarations and documentation that any residual contaminants are below Prop 65 levels or subject to safe harbor warnings.

Where settlements and litigation intersect with commercial choices

A Prop 65 60-day Notice typically begins a cascade: the alleged violator and the Attorney General receive notice, and the private enforcer may file suit after the notice period if no settlement resolves the claim. Settlements usually include three elements: a monetary payment allocated between the state and the plaintiff, an agreement on injunctive relief (often new warning requirements or product reformulation), and attorney’s fees for the plaintiff. Litigation, conversely, can be protracted and expensive.

Civil penalties can reach $2,500 per day per violation. In practice, many settlements are significantly less than the theoretical maximum, but they can still be substantial when aggregated across product lines or SKUs. Attorney’s fees increase settlement pressure, and injunctive obligations can create long-term costs related to labeling, packaging changes and reformulation.

Companies must weigh short-term settlement costs against uncertain litigation outcomes. A strategic mix of early investigation, exposure assessment, and counsel-led negotiation can reduce financial exposure while addressing technical and compliance gaps.

Practical compliance measures: a prioritized roadmap

Companies that sell products into California — whether food, cosmetics, consumer goods or household items — should take the following prioritized steps to manage Prop 65 risk effectively:

1. Inventory and prioritization
   • Compile a product inventory with SKUs that are sold in California.
   • Prioritize products for review based on exposure likelihood, category-specific risk and volume of sales into California.
2. Ingredient and material declarations
   • Collect and verify supplier declarations and certificates of analysis (COAs) for raw materials and components.
   • Require suppliers to report presence of Prop 65-listed chemicals and to notify you of any changes in sourcing or formulation.
3. Targeted testing and exposure assessment
   • Develop a risk-based testing plan that considers the product matrix, potential contaminant sources, and concentration effects.
   • Use validated analytical methods and accredited labs. For food products, ensure sampling plans reflect production batch uniformity to avoid misleading results.
   • Convert detected concentrations into consumer-exposure estimates (mg/day) and compare to Prop 65 NSRLs (for carcinogens) or MADLs (for reproductive toxicants). Where thresholds are exceeded, a warning or mitigation is necessary.
4. Labeling and warning strategies
   • If exposure exceeds Prop 65 thresholds, determine whether a safe-harbor warning applies and, if so, implement the prescribed language and display rules.
   • Avoid generic or noncompliant warnings; follow OEHHA guidance on "clear and reasonable" wording, placement and format.
   • Consider consumer communication beyond warning labels — e.g., product web pages, safe-use guides — but do so carefully to avoid inconsistencies with label content.
5. Reformulation and substitution
   • Where feasible, substitute chemicals of concern with safer alternatives that do not create new compliance problems.
   • For packaging that contacts food, adopt food-contact compliant materials with migration data supporting safety thresholds.
6. Contracts and supply-chain controls
   • Include Prop 65-specific warranties and indemnities in supplier agreements.
   • Require suppliers to provide advance notice of ingredient changes and test results for listed chemicals.
   • Audit suppliers on a risk-based schedule.
7. Internal governance and incident response
   • Establish clear protocols for investigating 60-day Notices, including timelines for sample collection, analysis and legal review.
   • Designate internal ownership (legal, regulatory, quality assurance) and have outside California counsel on retainer for rapid response.
   • Track all communications and maintain contemporaneous records of testing, supplier interactions and corrective actions.
8. Insurance and financial planning
   • Review insurance policies for coverage of defense costs and settlements tied to Prop 65 actions; coverage is uneven and often contested.
   • Model potential settlement scenarios for worst-case product lines and incorporate those into risk-management plans.
9. Training and education
   • Educate purchasing, R&D and quality teams on Prop 65-listed chemicals and the implications of cross-border supply decisions.
   • Train packaging and labeling teams on safe-harbor warning requirements to avoid label defects.

Prioritizing these measures yields both immediate defensive benefits and longer-term reductions in enforcement risk.

Testing strategy: how to obtain defensible results

Testing is central to both compliance and litigation. Yet testing without a defensible plan creates risk: inconsistent samples or non-validated methods can be attacked by plaintiffs’ counsel. Companies should adopt a testing strategy with these elements:

• Method selection. Use standardized, validated analytical methods appropriate for the matrix (e.g., ICP-MS for metals in food, LC-MS/MS for PFAS, ELISA or LC-MS for mycotoxins).
• Accredited laboratories. Contract with labs accredited by recognized bodies (e.g., ISO/IEC 17025) that can provide chain-of-custody documentation and method validation data.
• Sampling design. Tailor sampling plans to product batch sizes, mixing processes and ingredient variability. For dry blends and powders, composite sampling can mask hot spots; consider hyper-targeted sample pulls for suspected contamination.
• Quality controls. Include blanks, spikes and matrix-matched standards. Maintain lab reports and raw data to support any exposure assessment.
• Exposure calculation. Translate concentration data into consumer exposure scenarios reflecting realistic serving sizes, frequency of use and consumer behavior. Compare results to NSRLs/MADLs and document assumptions.
• Repeat testing and retention. For contested results, perform confirmatory tests and retain sample material when possible for third-party reanalysis.

Defensible testing reduces settlement pressure by allowing accurate exposure calculations and provides a foundation for technical challenges to plaintiff evidence.

Responding to a 60-day Notice: a step-by-step operational checklist

When a company receives a Prop 65 60-day Notice, speed and documented process matter. Follow a clear protocol:

1. Immediate intake and preservation
   • Preserve the Notice and record receipt date. Ensure the notice was properly served and that the referenced product, batch or SKU is identified accurately.
   • Suspend any product disposition that could affect sample availability; preserve retained samples and production records.
2. Notification and team mobilization
   • Notify legal counsel, quality, regulatory and senior management. Assemble a cross-functional response team with clear responsibilities.
   • Engage California counsel experienced in Prop 65 litigation — early counsel helps shape technical and tactical responses.
3. Investigate and test
   • Retrieve production records, supplier COAs and certificates, and batch tracking information.
   • Conduct targeted testing of retained samples and, if necessary, procure the same product from the market for comparative testing. Use accredited labs and defensible sampling plans.
4. Exposure assessment and legal analysis
   • Translate test results into exposure estimates and compare to Prop 65 levels. Determine if a defense exists (e.g., exposures below NSRL/MADL, product not commonly used in California, labeling already in place).
   • Evaluate procedural defenses: Was the 60-day Notice properly served? Are named plaintiffs properly situated? Are there jurisdictional or preemption arguments?
5. Negotiation or litigation decision
   • Based on technical and legal analysis, decide whether to negotiate a settlement or contest the claim. Consider reputational impact, settlement cost vs. likely litigation expense, and scope of injunctive obligations.
   • If negotiating, scope the settlement to include reasonable business terms: limited injunctive obligations, global vs. California-only modifications, and confidentiality where feasible.
6. Documentation and remediation
   • Document all steps taken to investigate and mitigate exposures. If product changes are agreed, implement reformulation, new labeling and supply-chain controls promptly.
   • Communicate internally about lessons learned and update risk assessments.

A disciplined response reduces financial loss and clarifies whether a warning or corrective action is necessary.

Litigation and defensive arguments frequently deployed

When cases proceed to litigation, defendants commonly assert several categories of defense:

• Procedural defects. Challenge the sufficiency or timeliness of the 60-day Notice, or the standing of plaintiffs where required.
• Exposure threshold defenses. Demonstrate that consumer exposures do not exceed NSRLs or MADLs, thereby negating the warning requirement.
• Scientific or evidentiary attacks. Contest testing methodologies, chain of custody or representativeness of sampled products.
• Product identity and attribution. Argue that the named product is not the source of the alleged exposure or that the plaintiff’s sample is unrepresentative or contaminated after purchase.
• Preemption or regulatory conflict. In narrow circumstances, argue that federal or other state laws preempt certain state-level claims; these defenses are fact-specific and limited.
• Operational impracticability or impossibility. Rarely successful, but sometimes raised where compliance would be impossible or would render a product unusable.

Strong technical evidence, robust analytical data and clear documentation of supply-chain controls make many of these defenses more persuasive. Engaging specialists — toxicologists, exposure assessors and analytical chemists — is essential for mounting an effective defense.

Emerging enforcement patterns and what to expect next

June 2026’s activity suggests several trends that will likely persist:

• Continued saturation of food categories. The clustering of Notices around powdered foods, meals and snacks suggests plaintiffs will keep targeting food matrices that concentrate contaminants.
• Expanded PFAS targeting. As jurisdictions tighten PFAS regulation, expect more targeted testing in both food (seafood) and consumer product categories.
• Focused campaigns. Plaintiffs deploy serial testing campaigns in targeted supply chains; companies that are part of the same sourcing network can be targeted in waves.
• Increased scrutiny of packaging and thermal papers. BPS and BPA notices reflect ongoing attention to receipt paper and container developers.
• Litigation as a tool for product change. Many enforcement actions result in injunctive terms that force labeling updates or reformulation; plaintiffs and counsel use settlements to achieve product-specific changes without full litigation.

Companies should assume enforcement will remain active and plan accordingly. Monitoring California’s Prop 65 list for new chemical listings and the Attorney General’s 60-day Notice database for category-level trends will help anticipate targeting.

Real-world examples and hypotheticals (illustrative, anonymized)

• A powdered greens manufacturer with global ingredient sourcing finds elevated cadmium in a third-party analytical screen. Following a 60-day Notice, the company performs a thorough investigation, demonstrates that typical serving exposures are below MADLs after accounting for dilution and serving-size assumptions, and negotiates a no-warn settlement that includes updated supplier agreements and targeted batch testing.
• A small apparel brand receives multiple Notices alleging the presence of lead in metal trims and DBP in vinyl accessories. The brand reforms its supply contracts to require phthalate-free materials, replaces metal trims with compliant alloys, and implements incoming inspection protocols, thereby addressing both potential penalties and the risk of repeat notices.
• A retail chain is served with Notices alleging BPA/BPS in thermal receipt paper. The retailer negotiates a settlement that funds a phased replacement to BPA-free paper and includes a consumer notification program and reimbursement for a portion of testing costs.

These scenarios show how technical, legal and business elements converge in Prop 65 interactions. Early technical assessment and supplier engagement can convert an immediate enforcement threat into a manageable remedial program.

Cost considerations: settlements, penalties and business impact

Prop 65 settlements vary widely. Factors that influence settlement size include the number of products at issue, the sales volume, the strength of technical evidence, the degree of alleged public harm and the plaintiffs’ settlement posture. Settlements commonly include:

• A monetary payment, partially directed to the California Office of Environmental Health Hazard Assessment (OEHHA) and partially to the private plaintiff(s).
• Attorney’s fees for the plaintiff.
• Injunctive relief requiring warnings, reformulation or restrictions on sales.
• Monitoring or testing commitments.

Although the statutory fine can reach $2,500 per day per violation, practical settlements for first-time small-to-medium defendants often fall well below statutory maximums. Nonetheless, for companies with large product portfolios or repeated noncompliance, aggregated exposure can be material.

Businesses should budget for both potential settlements and the cost of implementing corrective actions (e.g., relabeling, reformulation, supplier audits), and incorporate Prop 65 risk into broader enterprise risk management.

Regulatory intersections and cross-jurisdictional implications

Prop 65 does not stand alone. Companies must consider interactions with federal food-contact regulations (FDA), EPA actions on pesticides and contaminants, and international standards (Codex, EU REACH). Aligning compliance programs across jurisdictions reduces duplication and improves defensibility:

• Where FDA preempts certain labeling claims, coordination with legal counsel is required to avoid conflicting obligations.
• EU and other jurisdictions may have parallel restrictions on phthalates, BPA or heavy metals; harmonizing substitution strategies reduces the risk of replacing a listed chemical with another regulated substance.
• PFAS restrictions are proliferating globally; anticipating restrictions in multiple markets supports longer-term material choices.

Compiling a crosswalk of regulatory standards and aligning R&D and procurement decisions with the strictest applicable standards can reduce downstream enforcement and recall risk.

Practical checklist: immediate actions for companies selling into California

• Map products sold in California and prioritize by risk.
• Implement supplier declarations requiring advance notice of ingredient changes and certificates of analysis for Prop 65 chemicals.
• Commission risk-based testing for high-priority SKUs (powdered foods, seafood, packaging and accessories).
• Prepare defensible exposure assessments and retain testing records.
• Update labeling practices to comply with OEHHA safe-harbor warning formats when exposure exceeds thresholds.
• Train internal teams on 60-day Notice protocols and retention of evidence.
• Retain California counsel experienced in Prop 65 to advise on notices and settlements.
• Review insurance coverage and budget for potential settlements and remediation costs.
• Monitor Prop 65 chemical list updates and Attorney General 60-day Notice filings to stay ahead of enforcement trends.
• Consider reformulation plans for products likely to trigger repeated enforcement.

These steps turn reactive measures into proactive risk-control strategies.

Conclusion (avoidance of cliché phrasing)

The June 2026 surge of 520 Prop 65 notices illustrates the ongoing, aggressive enforcement environment created by California’s private-enforcement regime. Heavy metals, PFAS, phthalates, bisphenols and mycotoxins dominate the allegations, and certain product types — powdered foods, prepared meals, seafood, containers and accessories — are repeat targets. Robust technical programs, supply-chain controls and a clear legal response plan are essential. Companies that maintain defensible testing, documented supplier controls and well-crafted warnings or reformulations significantly reduce their exposure to penalties and extended litigation.

FAQ

Q: What triggers a Prop 65 warning requirement? A: A warning is required when a consumer product exposes a person in California to a listed chemical in amounts exceeding the applicable NSRL (for carcinogens) or MADL (for reproductive toxicants). The assessment converts measured or estimated concentrations into expected daily consumer exposure based on realistic use scenarios. If exposure exceeds the relevant threshold, the seller must provide a “clear and reasonable” warning unless another legal defense applies.

Q: Who can file a Prop 65 enforcement action? A: Private citizens, commonly referred to as “private enforcers” or plaintiffs, can file enforcement actions after providing a 60-day Notice to the California Attorney General and the alleged violator. The Attorney General may also elect to prosecute, but most enforcement comes from private plaintiffs.

Q: What does a 60-day Notice mean and how should a company respond? A: A 60-day Notice informs the state and the alleged violator of an intended Prop 65 action. Companies should immediately preserve evidence and retained samples, notify internal teams and counsel, begin a targeted investigation and testing protocol, and prepare an exposure assessment. Early engagement with counsel can produce settlement options or technical defenses.

Q: Are retailers and marketplaces liable under Prop 65? A: Retailers and others in the distribution chain can be named in Notices and sued. Liability depends on the specific facts, including who is responsible for product design, labeling and California sales. Online marketplaces must pay careful attention because they often host products supplied by third parties but still face legal exposure.

Q: What are NSRLs and MADLs? A: NSRLs (No Significant Risk Levels) are numeric benchmarks for carcinogens under Prop 65 that represent the daily exposure amount that would result in no more than a one-in-100,000 lifetime risk of cancer. MADLs (Maximum Allowable Dose Levels) are thresholds for reproductive toxicants that represent daily exposures considered to have no observable reproductive effect. If exposures are below these levels, no warning is required under safe-harbor rules.

Q: Can a generic “this product contains a chemical known to the State of California to cause cancer” warning satisfy Prop 65? A: Prop 65’s “clear and reasonable” standard requires warnings to be specific and conform to OEHHA guidance if relying on safe-harbor language. Generic or vague warnings increase legal risk and may not be defensible. Use the prescribed safe-harbor wording where applicable and consult counsel to ensure label and online disclosures meet formatting and content requirements.

Q: What steps reduce the risk of recurring Notices? A: Implement supply-chain controls, require supplier warranties and COAs, adopt risk-based testing, reformulate to remove listed chemicals, maintain rigorous documentation, and use compliant warnings where necessary. Education and oversight of suppliers and contract language that imposes obligations on upstream actors are especially effective.

Q: How long is litigation and what are likely outcomes? A: Litigation timelines vary. Many matters settle during the pre-litigation or early litigation stages. Settlements typically include monetary payments, injunctive relief (warnings or reformulation) and payment of plaintiffs’ attorney’s fees. Cases that proceed to trial can take years and generate substantial legal costs.

Q: Should companies proactively issue warnings to avoid litigation? A: Proactive warnings can reduce immediate litigation risk but may have commercial implications and could be unnecessary if exposures are below thresholds. A measured approach — testing, exposure assessment and then implementing warnings only when required — balances legal protection against unnecessary consumer alarm and sales impact.

Q: Where can I find the official list of Prop 65 chemicals and recent Notices? A: The California Office of Environmental Health Hazard Assessment (OEHHA) maintains the Prop 65 chemical list and related guidance. The California Attorney General’s office maintains a searchable database of 60-day Notices and settlements. Monitoring both resources helps companies anticipate changes and track enforcement trends.

Q: What industries are at highest risk right now? A: Based on June 2026 Notices, food and beverage manufacturers (particularly producers of powdered products, meals, fruits/vegetables and snacks), seafood suppliers, consumer-goods manufacturers (containers, accessories, household items), and cosmetics/personal-care companies face elevated risk. Retailers and distributors of these products also carry substantial exposure.

Q: How should small businesses approach Prop 65 risk? A: Small businesses should focus on the highest-risk SKUs, obtain supplier declarations and COAs, perform targeted third-party testing, and consult counsel to negotiate practical settlements or to establish defensible no-warn positions. Proactive controls and documentation provide a strong defense against both Notices and potential lawsuits.

Q: Are there resources or consultants that specialize in Prop 65 compliance? A: Yes. Many law firms, testing laboratories and regulatory consultants specialize in Prop 65 compliance, offering services that range from chemical lists monitoring and exposure modeling to warning language development and litigation defense. Choose providers with demonstrated experience in California regulatory matters, validated testing credentials and a track record in Prop 65 matters.

Q: Can product reformulation eliminate Prop 65 risk? A: Reformulation to remove or replace listed chemicals reduces risk where those chemicals are the exposure source. However, substitution must be prudent: the replacement chemical should not be another listed substance or create other regulatory problems. Comprehensive hazard screening and forward-looking regulatory assessments reduce the risk of “regrettable substitutions.”

Q: How often does OEHHA update the Prop 65 list? A: OEHHA adds chemicals to the Prop 65 list after a listing process that includes review of authoritative bodies and publication requirements. Listings occur irregularly; companies should monitor OEHHA announcements to stay current.

Q: Can a company challenge a Prop 65 Notice’s testing or methodology? A: Yes. Defendants frequently challenge plaintiffs’ testing on the grounds of sample integrity, chain of custody, method validation, representativeness of the sample and statistical significance. Retaining independent lab testing and technical experts is essential to rebut or validate contested findings.

Q: Are online listings and e-commerce product pages subject to Prop 65 warning requirements? A: Yes. Online sales into California may trigger warning obligations. OEHHA provides guidance on internet and catalog warnings; compliance typically requires that warnings be clear and reasonably calculated to be received by California consumers prior to purchase or use. Consult counsel for tailored steps for online product listings and digital sales channels.

Q: Does Prop 65 apply only to products manufactured in California? A: No. Prop 65 applies to any product sold in California, regardless of where it was manufactured. Sellers who ship into California — including national and international brands — must ensure compliance for products offered to California consumers.

Q: What role does science play in Prop 65 defenses? A: Science is central. Exposure assessments, toxicological analysis, and robust analytical chemistry underpin defenses that exposures are below NSRLs or MADLs, or that the product does not meaningfully expose consumers to a listed chemical. Scientific evidence also supports remediation plans and informs settlement negotiations.

For further steps, companies should begin with a prioritized inventory review and targeted, accredited testing of high-risk products. Prop 65 enforcement remains a practical regulatory risk; preparedness reduces disruption and cost.