Every ceramic tableware program bound for the United States is measured against one set of numbers: the lead action levels in FDA regulation 21 CFR 109.16, plus the cadmium levels FDA enforces through its Compliance Policy Guide. This article explains what those limits actually say, how laboratories produce the numbers, and what happens to a shipment that misses them.
It is written for importers, ecommerce brands and hospitality buyers who purchase ceramic plates, bowls, mugs and teapots from China. US market entry does not require a license or an approval for tableware — it requires that your goods stay below the action levels for lead and cadmium migration, and that you can demonstrate it with third-party testing when a customer, a platform or an inspector asks.
What 21 CFR 109.16 actually is
21 CFR 109.16 sets action levels for lead leached from ceramic tableware into a 4-percent acetic acid solution — the food simulant regulators use to approximate acidic contact such as wine, vinaigrette, coffee and tomato-based dishes. An action level is not a tolerance or an approval threshold. When migration exceeds it, the article is considered adulterated under the Federal Food, Drug, and Cosmetic Act and can be refused entry or seized. Note the citation carefully: 21 CFR 109.16 is the ceramics provision. Industry paperwork that cites a different, neighbouring section number for tableware is misquoting the code, and a supplier who gets the citation wrong in their documents deserves a closer look at everything else they file.
Two features of the regulation matter operationally. First, the limits differ by category of ware: a dinner plate is permitted to release more lead than a mug, because drinking contact and prolonged liquid contact concentrate exposure. Second, the regulation states limits, not test conditions — the laboratory procedure lives in ASTM C738, the method FDA laboratories and the commercial testing industry use for these extracts.
The lead limits, category by category
| FDA category | Typical pieces | Lead action level |
|---|---|---|
| Flatware | Plates, platters, saucers | 3.0 µg/mL |
| Hollowware (other than small and large hollowware) | Mid-size serving bowls | 2.0 µg/mL |
| Cups, mugs and pitchers | All drinkware and pour vessels | 0.5 µg/mL |
| All other large hollowware | Large-capacity vessels | 1.0 µg/mL |
The asymmetry is deliberate: the tighter the contact scenario, the lower the permitted migration. Drinkware sits at 0.5 µg/mL — the strictest US figure — which is why mugs, teacups and teapots are the first items to fail when a factory changes glaze or decoration suppliers without retesting. When you review a quotation or a test report, confirm that each SKU was assessed against the correct category, not against the loosest one that produces a pass.
Cadmium: enforcement levels, not a regulation
Lead has a binding regulation; cadmium does not. FDA's cadmium posture for ceramics lives in the Compliance Policy Guide — CPG Sec. 545.400 addresses cadmium, with CPG Sec. 545.450 covering lead. Under that guidance, FDA applies enforcement levels of 0.5 µg/mL cadmium for flatware and 0.25 µg/mL for cups, mugs, pitchers and small hollowware, using the same 4-percent acetic acid procedure as the lead limits. In trade, the shorthand for drinkware that "meets FDA levels" is lead at or below 0.5 µg/mL and cadmium at or below 0.25 µg/mL per ASTM C738.
Treat the CPG numbers with the same discipline as the CFR numbers. Goods above them face detention, and sophisticated US customers increasingly screen against stricter private requirements of their own. The absence of a binding cadmium regulation is not an argument for relaxing your specification; it is a reason to fix the cadmium criterion in your purchase order yourself.
How the test works: ASTM C738
Laboratories fill or immerse the article with a 4-percent acetic acid solution, hold it for 24 hours at 24°C, and analyse the leachate by atomic absorption spectroscopy or equivalent instrumentation. Results are reported in micrograms per millilitre of leachate — numerically the same as parts per million of the extracting solution. The procedure runs per piece, which is why the sample count and piece identities on the report matter when you read it later: a single decorative mug tested on its own proves nothing about a 500-piece production run unless the samples came from that run.
What happens when a shipment fails
A single failing entry brings FDA detention, with re-export or destruction at the importer's expense and the landed cost of the goods written off. Repeated violations put the manufacturer and its products on Import Alert 52-13, which authorises detention without physical examination of ceramic tableware that appears to violate the lead limits. Goods from an alerted firm can be refused entry unless the importer demonstrates compliance, and the alert is public — competitors and customers can read it. Beyond the shipment itself, a violation typically costs marketplace listings, retail programmes and the customer conversation that follows.
A failed ceramic shipment rarely costs only the goods. It costs the season, the listing and the trust that made the order possible.
How to buy against these limits
- Write the standard into the purchase order: 21 CFR 109.16 lead action levels, cadmium per CPG Sec. 545.400, tested by ASTM C738, per correct ware category.
- Reduce risk structurally: underglaze decoration and lead-free glaze systems lower migration risk by construction, before any test result exists.
- Use an accredited third-party laboratory: firms such as SGS, Intertek and TUV are commonly engaged for ceramic migration panels.
- Obtain reports before shipment, matched to the golden sample and the production batch, and keep them in the shipment file.
Our quality and compliance practice is built on exactly this discipline — named standards, third-party reports available on request, and no unverified claims on the box. For the wider US entry picture, including duty treatment under HS 6911 and 6912, see the United States market guide and our tariff notes.
Frequently asked questions
Are the FDA limits legally binding?+
The lead action levels in 21 CFR 109.16 are binding in effect: exceeding them renders the article adulterated and subject to refusal. Cadmium levels are enforced through FDA's Compliance Policy Guide (CPG Sec. 545.400) rather than a binding regulation, but goods above them still face detention in practice.
Does meeting the limits mean the ware is lead-free?+
No. The limits cap how much lead may migrate into food simulant, not how much lead the glaze or decoration contains. Well-made underglaze and lead-free glaze lines test far below the limits, but the only honest claim is a test result against a named standard, not a blanket lead-free label.
My supplier shows an "FDA approved" logo. Is that real?+
FDA does not approve ceramic tableware. It publishes action levels and enforces them at the border. Ask for the third-party laboratory report that shows the standard, the method, the category and the numbers — reports available on request is the normal, legitimate formulation.
How often should a programme be retested?+
Retest whenever the inputs change: a new decoration colour, a new glaze or frit supplier, a new kiln or body batch, or a new factory. Ongoing programmes without changes are commonly retested on a periodic cadence agreed with the customer, and reports are archived against the golden sample.
