California Prop 65 Warning Requirements for Taiwan Product Exporters

Proposition 65 (Safe Drinking Water and Toxic Enforcement Act, 1986) requires businesses to provide a clear and reasonable warning before knowingly and intentionally exposing any person to a listed chemical above a threshold level. The California Office of Environmental Health Hazard Assessment (OEHHA) maintains the list, which contains over 900 chemicals including lead, phthalates, cadmium, formaldehyde and BPA.

Violations are enforced primarily through citizen suits filed by private plaintiff firms, not government agencies. Settlements range from $5,000 to over $500,000 plus attorney fees. For Taiwan exporters selling into California — including via Amazon or brick-and-mortar — Prop 65 exposure is real.

Consumer products most frequently targeted include: tableware and kitchenware (lead in glazes), jewelry and accessories (cadmium, nickel, lead), children's toys (phthalates, lead), electronic cables and chargers (DEHP, lead), cosmetics (formaldehyde releasers), food packaging (BPA) and dietary supplements.

Plaintiff firms buy products at retail, test them at accredited labs and file a 60-day notice of violation if the chemical level exceeds the threshold. The notice triggers a settlement negotiation or, if unresolved, litigation.

OEHHA's 2018 regulations introduced clear, standardized warning language. The short-form warning must include the yellow triangle symbol, the word WARNING and approved language such as: "WARNING: This product can expose you to [chemical], which is known to the State of California to cause [cancer/reproductive harm]. For more information go to www.P65Warnings.ca.gov."

Warnings must appear on the product label, on the product itself or be provided at the point of sale (for retail) or on the product detail page (for e-commerce). For Amazon, the warning must appear in the product listing and optionally in the package insert.

A warning is not required if exposure is below the No Significant Risk Level (NSRL) for carcinogens or the Maximum Allowable Dose Level (MADL) for reproductive toxicants. OEHHA publishes safe harbor levels for most listed chemicals. For example, the MADL for DEHP (a common phthalate) is 8.7 micrograms per day.

A chemical migration study — simulating how much of the chemical transfers from product to user under realistic use conditions — can demonstrate that exposure is below the threshold. This is called a quantitative exposure assessment and can avoid the need for a warning label.

Commission testing at an OEHHA-recognized laboratory for chemicals likely to be present in your product category. For electronics, test for DEHP, DBP, BBP, DINP and lead. For painted products, test for lead. For food contact materials, test for BPA and lead.

If concentrations exceed safe harbor levels, consider reformulation: switching to phthalate-free plasticizers, using lead-free paints or glazes, or changing packaging materials. Many Taiwanese manufacturers have already reformulated for RoHS and REACH — check if those test results also cover Prop 65 chemicals.

If your business receives a Prop 65 60-day notice of violation, act immediately. Retain California counsel who specialises in Prop 65 defense. Gather product test data, manufacturing records and sales documentation. Settlement typically involves a reformulation commitment, a penalty payment and an injunction to add warnings — all within 60 days of the notice.

Do not ignore notices. Failing to respond results in the plaintiff filing suit in Superior Court, where penalties escalate to $2,500 per day per violation.