Lead in Tile

Introduction

Lead can appear in the glaze of a tile (the thin, glass-like layer on top) or in the natural clays used to make the tile body. Historically, tile makers used lead because it helped glazes melt evenly, improved durability, and created vibrant colors like reds, yellows, and metallic tones.

Today, the decorative tile industry is global and not heavily regulated for lead content, so the safest assumption is that any tile may contain lead unless the manufacturer provides test results showing otherwise. This isn’t a reason to panic — just a reason to be informed.

It’s also not accurate to assume that tiles from countries with strict environmental rules automatically contain less lead. What matters most is the manufacturer’s own testing and quality control practices, not the country of origin.

Tiles more likely to contain or release lead include:

• Low-fire artisanal tiles

• Decorative wall tiles

• Antique or vintage tiles

• Imported tiles without a Safety Data Sheet (SDS)

• Tiles with crazing or glaze damage

Disclaimer:  This article is for general information only. If you believe you’ve been exposed to lead, contact your doctor. If you’re planning to remove tile and are concerned about dust exposure, follow EPA RRP lead-safe work practices, contain the area, and wait for clearance testing before re-occupying.

Does Zellige tile have lead in it?

Some Zellige tiles do contain lead, but the only way to know for sure is to request the manufacturer’s Safety Data Sheet (SDS) or have the tile tested by a reputable laboratory. This applies to all ceramic tiles, not just Zellige.

Zellige is unique: it’s hand-made, low-fired, and traditionally glazed, which means quality varies widely from brand to brand. Lower-quality Zellige with heavy crazing or uneven glaze is more likely to leach lead if lead is present in the glaze.

Tiles of Ezra lead content is published on our Safety Data sheets online, and a large portion of our color range now tests as “lead-free” (<100 ppm). High-quality control is a big part of reaching these low levels: every batch is checked repeatedly throughout production to ensure consistency.

How to Use Zellige Safely

Zellige performs best when installed exactly as recommended:

• Use it on walls or floors where the glaze stays intact

• Avoid using Zellige on countertops or surfaces where acidic foods or cleaners are used

• Use mild cleaners & avoid exposing the glaze to acids

• Always follow Worksafe/OSHA/EPA RRP practices when cutting, drilling, or removing tile
  

Is lead dangerous?

Yes — lead is harmful, and the body doesn’t easily remove it. The Mayo Clinic notes that exposure can affect the brain, kidneys, and nervous system, particularly in children. There is no known “safe” level of lead in the body.

Children and pregnant women are most vulnerable. According to the CDC, children absorb more lead than adults and are especially affected by dust, which is the most common exposure route.

However, it’s important to keep this in perspective: lead dust from cutting, drilling, or demolishing materials is the primary risk. 

Is lead in tile dangerous? 

The presence of lead in tile doesn’t automatically mean it’s hazardous. The risk depends entirely on how the tile is used and whether dust is generated.  Here is a breakdown of risk which is generalized for informational purposes.

Higher-Risk Situations

• Cutting or drilling tile during installation

• Demolition or renovation

• Tiles that are cracked, chipped, or showing glaze degradation

• Low-fired with unstable glazes

• Old & Vintage Tile

Lower-Risk Situations

• Tiles with verified low lead content

• In-tact Tile

• Tiles maintained with non-acidic cleaners

• High-fired with stable glazes

• New

Accurate Sources of Information

It’s no secret that information produced from AI is often not accurate and can be misleading.  The prompt  “does tile have lead in it” revealed information that was untrue and misleading.  In fact, AI output incorrect information, twice, and only corrects itself when the prompt points out the errors.

One common myth:

“Lead in tile was banned in the U.S. in 1978.”

This is incorrect as 1978 was the ban on lead in paint, not tile. Decorative tile was not included, and manufacturers were not required to remove lead from glazes at that time.

Today, many tile brands are voluntarily moving toward low-lead or lead-free products, but this shift is relatively recent.

Brief History of Lead in Tile

Lead has been part of ceramic tile for a very long time — long before anyone understood its health risks. Early potters simply noticed that when they mixed certain minerals into their glazes, the fired pieces came out smoother, shinier, and far more colorful. One of those minerals was lead, and it quickly became a go-to ingredient.

In some of the earliest tile-making regions — Mesopotamia, Persia, China — lead made it possible to melt glaze at lower temperatures, which was a big deal at a time when kilns were unpredictable and hard to control. As techniques spread, lead became central to the brilliant blues and greens seen in Islamic tilework. The famous tiles of Morocco, Turkey, and Iran owe much of their jewel-like depth to traditional lead-based glaze recipes.

Europe leaned on lead as well. By the 1700s and 1800s, tile factories across England, Portugal, Spain, and the Netherlands were using lead to create consistent, glossy surface finishes. Victorian tiles in particular relied heavily on lead glazes, though the workers making them often paid the price with high exposure — a reality that later helped push safety regulations forward.

The move away from lead began in the mid-20th century as modern kilns and lead-free frits became available. Most mass-produced tiles in the U.S. and Europe are now low- or no-lead.

Although mass-produced commodity products may have little to no lead, it still shows up in traditional, handmade tile, as well as in some small-studio glazes and older imported decorative tiles. In those cases, the lead isn’t there by accident — it’s part of the look. The movement of color, the slight glassy pooling, the crackle — those effects are extremely hard to replicate with modern lead-free chemistry.

Lead Tile Regulations

Decorative tiles with lead which are used for architectural surfaces are legal in both Australia and the United States, with the exception of Tiles intended for food contact. Although the USA banned lead in paint in the 70’s, tile was exempt, despite information on the internet which often includes tile.  

Below are some key dates in Australia & the United States relating to Lead regulation in general.

Australia

• 1920s–60s: Voluntary limits begin

• 1965: Lead in domestic paint limited to 1%

• 1997: Reduced to 0.25%

• 2010: Reduced to 0.1% (1,000 ppm)

• 2022: Reduced to 90 ppm

• Plumbing and ceramicware regulations continue evolving
  
  

United States

• 1971: First federal action on lead in homes

• 1978: Lead paint banned (<0.06%)

• 1986–2020: Progressive limits on lead in plumbing

• 1998: FDA tightens limits on leachable lead in ceramicware

• 2008: CPSIA sets 90–100 ppm limits for children’s products

• 2010: EPA RRP Rule for safe renovation practices

Lead in Tiles of Ezra Products

Visual appearance isn’t a reliable indicator of lead content — testing is the only way to know. Recent lab testing shows that 16 of our colors fall under 100 ppm, which is considered “lead-free” for nearly all regulatory purposes.

To categorize our colors we used the below groupings

100-300 ppm Lead Free
300-1,000 ppm Moderately Elevated
1,000-5,000 ppm Higher Lead Content
5,000-10,000 ppm Very High Lead Content

Tiles of Ezra Lead Test Results

When navigating our website, use the below iconography to determine if a glaze is lead free or has low Silica.

Risk (Keeping Perspective)

Installed Zellige — even colours that contain lead — is very unlikely to pose a health risk when used as intended. Zellige is fired at high temperatures, which stabilizes the glaze and prevents leaching when properly maintained.

Here are the factors keeping risk low:

• Properly glazed

• Intact and not chipped 

• Not used for food preparation surfaces

• Not drilled or cut after installation

• Not exposed to acidic cleaners or liquids

The highest risk is the same for any tile: cutting and demolition, where dust can be created.

 

Quality Control

Our quality control process is woven through every stage of production.  

• Glaze checks for full coverage and consistency

• Post-kiln inspections

• Quality checks after cutting all 4 sides

• Final inspection before grouping into cartons

• Additional checks when arriving at our warehouse

This helps ensure consistency and minimizes glaze defects that could impact long-term safety.

Safety Resources

We recommend combining the safety precautions in “Working Safely with Tiles and Crystalline Silica" with additional precautions when cutting tile which contains lead.

General silica-safety guidelines align closely with lead-safe practices. Using both together significantly reduces risk when working with tile.

Recommended practices:

• Wet cutting and on-tool HEPA extraction

• Respiratory protection when dust can’t be fully controlled

• Containment of the work area

• Cleaning with HEPA vacuums or wet methods

• Washing hands, changing clothes, and keeping food and drinks away

Silica controls reduce airborne dust; lead-safe hygiene prevents accidental ingestion. Both are essential when cutting or removing any glazed tile.

Conclusion

When Zellige is installed and used the way it’s meant to be, it’s incredibly stable and poses little to no risk. The glaze is fired hard, it doesn’t leach under normal conditions, and as long as it’s intact and not on a food-prep surface, it performs exactly as intended.

The bigger concern is dust from cutting, drilling, or demo, which is true for every type of glazed tile. Using proper lead-safe and silica-safe practices during that work keeps the risk low and manageable.

With good information, proper installation, and some basic awareness during renovations, you can choose Zellige confidently and enjoy it for exactly what it is — a beautiful, traditional material that’s safe to have in your home when used correctly.