If you sell bamboo or wood products into California—bamboo cutlery, chopsticks, skewers, cutting boards, toothbrushes, popsicle sticks, even packaging components—Proposition 65 (“Prop 65”) can become a real business risk if you don’t plan for it early.

Prop 65 doesn’t “ban” products. It requires a clear and reasonable warning when a product exposes consumers to a chemical California has listed as causing cancer or reproductive harm—unless the exposure is below a regulatory “safe harbor” level or otherwise qualifies for an exemption.

This guide explains what that means in practical importer terms, where bamboo/wood products usually get into trouble, and how to build a repeatable compliance workflow.

Table of contents

  1. What Prop 65 is (and what it is not)
  2. Why bamboo/wood products get flagged
  3. “Safe harbor” levels: the key idea importers miss
  4. Warning rules for eCommerce and listings
  5. 2025–2028 short-form warning update (important)
  6. A practical compliance checklist (copy/paste)
  7. FAQ for importers selling bamboo/wood products in CA
Prop 65 compliance checklist infographic for bamboo and wood products sold in California

1) What Prop 65 is (and what it is not)

Prop 65 (Safe Drinking Water and Toxic Enforcement Act of 1986) requires businesses to inform Californians about significant exposures to chemicals that are on the state’s continuously updated Prop 65 list.

Key points for importers:

  • Prop 65 is exposure-based (not “contains chemical = illegal”). Proposition 65 Warnings Website
  • The chemical list is updated regularly (OEHHA posts the current dated list).
  • Businesses often rely on “safe harbor” approaches (levels + warning formats) to reduce legal uncertainty.

Quick reality check: If you sell into California, Prop 65 is often handled like a “labeling + documentation discipline,” not a one-time task.

2) Why bamboo/wood products get flagged (common risk pathways)

Bamboo and wood are often perceived as “clean materials,” but Prop 65 risk usually comes from:

A) Contamination in raw material or processing

  • Trace metals (e.g., lead) can be present in the environment and show up in finished goods at low levels.
  • Carbonization, heat treatment, or certain processing steps don’t automatically remove trace elements—importers still need exposure context and, when needed, testing.

B) Added components (the most common culprit)

Even if the bamboo/wood part is clean, other parts can trigger exposure:

  • Inks, dyes, surface printing (logos, patterns)
  • Adhesives/lamination layers
  • Coatings (some “food-safe finishes” still need verification)
  • Metal staples/springs (e.g., clothespins)
  • Packaging: plastic windows, soft PVC, colored ties, etc.

C) Usage drives exposure scenarios

Prop 65 is about exposure, so usage matters:

  • Food-contact items (cutlery, skewers, chopsticks, popsicle sticks) can raise questions about migration/transfer over time.
  • Kids/family items (toothbrushes) are used daily, which can increase attention from compliance teams.

3) “Safe harbor” levels: the key idea importers miss

OEHHA publishes “safe harbor” levels for many Prop 65 chemicals:

  • NSRLs for cancer risk
  • MADLs for reproductive toxicity

If exposure is at or below the applicable safe harbor level, a warning is not required (and you’re in a much safer compliance position).

Important details:

  • There are 300+ regulatory safe harbor levels across chemicals.
  • If there is no safe harbor level for a chemical, businesses may still avoid warnings only if they can demonstrate exposure does not pose a significant risk—this can be complex and often needs qualified help.

Practical importer approach (recommended):

  1. Identify candidate chemicals relevant to your product category & components
  2. Decide whether you will:
    • design out the risk (preferred), or
    • test/assess exposure and document a “no warning needed” position, or
    • use a compliant warning (when necessary)

4) Warning rules for eCommerce and listings

If you sell online, Prop 65 warning obligations can apply both:

  • on the product / packaging, and
  • on the product page listing (website warning before purchase)

OEHHA’s Prop 65 warnings guidance includes rules for consumer product warnings and online display approaches (often implemented as label images or explicit warning text near purchase actions).

Importer takeaway: don’t treat Prop 65 as “label only.” Your Amazon/Shopify/wholesale listing content may need alignment with the physical packaging workflow.

5) The 2025–2028 short-form warning update (don’t get caught in transition)

Short-form warnings are changing. OEHHA guidance notes:

  • Businesses can use new safe harbor language for short-form warnings.
  • Products manufactured and labeled before Jan 1, 2028 may continue using the prior short-form or the new one with safe harbor protection.
  • Starting Jan 1, 2028, businesses must use the new short-form language to keep safe harbor protection.

The updated warning regulations were adopted with an effective date of January 1, 2025 (with a transition period).

What to do now (simple):

  • If you rely on short-form warnings today, start designing packaging templates that can switch cleanly to the new language.
  • Keep manufacture/label dates in your compliance files to prove eligibility during transition.

6) A practical Prop 65 compliance checklist for bamboo/wood importers

Copy/paste this into your sourcing SOP:

Step 1 — Define product & exposure context

  • Product type (food contact / personal care / home)
  • Intended users (general adult / family / kids)
  • Use frequency (daily, occasional, single-use)

Step 2 — List every component (don’t skip packaging)

  • Bamboo/wood body
  • Printing/ink areas
  • Adhesives & laminates
  • Metal parts (springs, staples)
  • Coatings/finishes
  • Packaging materials + printing

Step 3 — Screen for likely Prop 65 risk drivers

  • Historically common Prop 65 notice drivers include lead and phthalates in enforcement trends. For example, third-party monthly analyses of Prop 65 60-day notices show lead and phthalates often represent a large share of notices in certain months.
  • Use the official state tools to review notices and categories if you want real enforcement examples in your segment.

Step 4 — Decide: design out, test, or warn

  • Design out: change ink supplier, remove risky coatings, switch packaging materials, etc.
  • Test/assess: confirm exposure is below safe harbor levels when applicable.
  • Warn (only if needed): follow safe harbor warning formats to reduce litigation ambiguity.

Step 5 — Build documentation (this reduces “panic warnings”)

  • Bills of materials + supplier declarations
  • Test reports (if used)
  • Artwork versions (with date)
  • Listing page screenshots (showing warning display, if applicable)

Step 6 — Contracting (very underrated)

  • Require suppliers to notify you of any formula/material/ink changes
  • Add indemnity + change control clauses
  • Lock packaging artwork approval into the PO process

7) FAQ (importer-focused)

Do we need Prop 65 warnings if we sell outside California?

Prop 65 is California-specific, but many brands apply the same labeling across the U.S. for operational simplicity. Whether you do so depends on your distribution strategy and legal advice.

Are small businesses exempt?

A company is exempt from warning requirements if it has fewer than 10 employees—but contractual obligations and retailer policies can still push compliance requirements.

If a product contains a listed chemical, is a warning automatically required?

Not necessarily. Prop 65 is about exposure. Warnings are tied to whether exposure exceeds safe harbor levels or otherwise poses significant risk.

Where do we find safe harbor levels?

OEHHA provides lists of NSRLs and MADLs (safe harbor levels). OEHHA

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