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Prop 65 Warning on Food: Who Needs One and the Wording

Prop 65 warnings on food: the under-10-employee exemption, who warns, the safe harbor wording and short form, acrylamide, online sales, and a free checklist.

By Koa Sterling. Product specialist at TaroStack and small business owner. Yes, I am a real human, and I actually sit in front of a computer and write these articles. Reviewed October 16, 2026 · 7 min read

California's Proposition 65 requires a business to warn people before it knowingly exposes them to a chemical on the state's list, about 900 chemicals known to cause cancer, birth defects or other reproductive harm, unless the exposure is low enough to pose no significant risk. For food, three things decide whether it reaches you. A business with fewer than 10 employees isn't covered at all. A chemical that's naturally occurring in a food isn't an exposure, if you can show it. And the warning falls on the manufacturer, who can put it on the label or send a written notice to each retailer every year. If you warn, the rules give safe harbor wording: a boxed "WARNING:" on the label, a short form that names the chemical, a special wording for acrylamide, and a warning before checkout online. In the example below, an Oregon kettle chip maker with 14 employees works through it for its California stores. Below are the rules, the wording, the example, and a free checklist.

The short version

  • Prop 65 covers products sold in California, including food, that expose people to a listed chemical.
  • Businesses with fewer than 10 employees aren't covered.
  • A chemical naturally occurring in a food isn't an exposure, to the extent you can show it.
  • The manufacturer warns: on the label, or by a written notice to each retailer's authorized agent, renewed every year.
  • On a label, the warning is set off from other information and enclosed in a box, starting with "WARNING:" in bold capitals.
  • A short form on the label names the chemical and is at least 6-point type.
  • Acrylamide, which forms when food is fried, baked or roasted at high heat, has its own wording.
  • Online, the warning shows on the product page, behind a "WARNING" link there, or before the purchase is complete.
  • Penalties reach $2,500 per violation per day.
  • TaroStack keeps each lot's test results and which California customers got it. More below.

The rules

Rule What the law and regulations say
Who's covered A "person in the course of doing business"; that excludes anyone employing fewer than 10 employees
When to warn Before knowingly exposing someone to a listed chemical, unless the exposure is low enough
Naturally occurring Eating a food isn't an exposure to a chemical naturally occurring in it, if you can show it
Who warns The manufacturer, producer, packager, importer, supplier or distributor
How A warning on the label or labeling, or a written notice to the retailer's authorized agent
The notice Names the product, includes the warning materials, has its receipt confirmed, and is renewed each year
Changes A new notice within 90 days when the chemical or the harm in the warning changes
The retailer Places and maintains the warning materials it receives
Enforcement The Attorney General, district attorneys, some city attorneys, and private individuals

The employee rule is Health and Safety Code 25249.11. The warning rules are 27 CCR 25600 to 25607.2, in OEHHA's unofficial copy of the regulations; the naturally occurring rule is section 25501. OEHHA's About Proposition 65 explains the list and the penalties. The regulations say plainly that they don't decide whether a warning is required for a given exposure; that's a question for your lab and your attorney. This is general information, not legal advice.

The wording

The safe harbor food warning, 27 CCR 25607.2, starts with "WARNING:", "CA WARNING:" or "CALIFORNIA WARNING:" in bold capitals:

For The words after "WARNING:"
Cancer "Consuming this product can expose you to chemicals including [chemical], which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov/food."
Reproductive harm The same, ending "to cause birth defects or other reproductive harm."
Short form, cancer "Cancer risk from exposure to [chemical]. See www.P65Warnings.ca.gov/food."
Short form, reproductive harm "Risk of reproductive harm from exposure to [chemical]. See www.P65Warnings.ca.gov/food."
Acrylamide "Consuming this product can expose you to acrylamide, a probable human carcinogen formed in some foods during cooking or processing at high temperatures. Many factors affect your cancer risk, including the frequency and amount of the chemical consumed. For more information including ways to reduce your exposure, see www.P65Warnings.ca.gov/acrylamide."

For one chemical, "chemicals including" can be left out. A short form goes only on the label, in type no smaller than 6-point. If the label has consumer information in another language, the warning goes in that language too. How the rest of the label works is in food labeling requirements for small business.

An example: an Oregon kettle chip maker

Hood River Kettle, a made-up chip maker in Hood River, Oregon, I use in these examples, has 14 employees and sells into California through a distributor, a co-op, a grocery store and its own website:

Question Hood River Kettle's answer
Employees 14, so the under-10 exclusion doesn't apply
Sold in California Yes: 30 stores through the distributor, plus the co-op, the grocery store and online orders
A listed chemical Acrylamide, which forms when potatoes are fried
Naturally occurring? No: it forms when the chips are cooked
Who warns Hood River Kettle, as the manufacturer
How On its attorney's advice, the acrylamide wording in a box on the back of the bag
Online A "WARNING" link on each chip page of its website

Its baked apple chips have no listed chemical the company knows of, so they're on its supplier and lab list to check. Its distributor asked for proof, so Hood River Kettle keeps each lot's acrylamide result from its lab with the lot, the way certificate of analysis tracking keeps lab reports, and keeps a log of the notices it sent before the boxed bags reached the shelves. What California stores ask of a supplier is in selling to grocery stores requirements.

Get the checklist

Download the Prop 65 food warning checklist. Three sheets: does it reach you, each product with your employee count, California sales, the listed chemical and whether it's naturally occurring; warning wording, which builds the safe harbor wording from the chemical and what it's listed for, full or short; and a log of written notices to retailers with each renewal date, red when overdue. It's an ordinary Excel file with no macros, and it works in Google Sheets, LibreOffice and Numbers.

Where this stops working

A warning decision rests on test results by lot, and a written notice rests on knowing which retailers got which products, renewed every year. When a buyer asks for proof, or a chemical changes, the answer has to come from records.

How TaroStack does it

TaroStack keeps each lot's test results and which California customers got it.

Results on the lot. Fields of your own on the batch record hold the lab's acrylamide result and the report number, so each lot carries its own proof.

Which customers got it. Each distributor, co-op and store is a customer, and each order records the lots it got, so one recall report shows every customer a lot reached.

Lots on the bag. Each batch gets a lot with its production and best-before dates, and lot labels print with it, so a bag on a California shelf leads back to its batch.

The job Spreadsheet In TaroStack
A lot's test result A folder of lab reports A field on the batch record
Which stores got a lot Searched invoice by invoice One recall report
A bag back to its batch The lot code, then the paperwork The lot, its batch and its orders

Lots, batches, orders and lot labels are on every plan, from $49 a month. The first 30 days are free, with no credit card. If you'd like a hand setting up, ask, and we'll do it with you.

Questions people also ask

Do small businesses need Prop 65 warnings?

Not if they employ fewer than 10 employees: Health and Safety Code 25249.11 leaves them out of the "person in the course of doing business" the law covers.

What does the Prop 65 warning on food say?

"WARNING: Consuming this product can expose you to [chemical], which is known to the State of California to cause cancer," with the harm that applies, then "For more information go to www.P65Warnings.ca.gov/food."

Who is responsible for the Prop 65 warning on food?

The manufacturer, packager or distributor, by putting it on the label or sending a written notice to the retailer, who then places it.

Why do so many foods have Prop 65 warnings?

A warning means the business believes it's exposing people to a listed chemical above the level that needs one. Acrylamide, which forms in some foods cooked at high temperatures, is a common reason.

Sources

  1. OEHHA: About Proposition 65 (the list, who enforces it, penalties) · read October 16, 2026
  2. California Health and Safety Code 25249.11: definitions, including the fewer-than-10-employees exclusion · read October 16, 2026
  3. OEHHA: Proposition 65 regulations, 27 CCR 25600 to 25607.2 (unofficial version, updated February 2025) · read October 16, 2026

We use AI to help with the research for these articles. Every one is read, checked against its sources and edited by Koa before it's published. Spot a mistake? Tell us and we'll fix it and say so. How we write these.

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