Dry cleaning chemicals pose real but manageable health risks, mostly to workers and people who wear freshly cleaned clothes

The main chemical in dry cleaning is perchloroethylene (PERC), a solvent that dissolves oils and stains without water. PERC is classified as a probable human carcinogen by the EPA, meaning long-term exposure raises cancer risk. However, the risk to customers who drop off and pick up clothes is low—you are exposed to fumes for minutes, not hours. Workers who spend eight hours a day in poorly ventilated shops face much higher risk. The chemical also damages your clothes over time by breaking down fibers, fading dyes, and making fabric brittle.

A smaller number of dry cleaners use hydrocarbon solvents (like Stoddard solvent) or liquid CO₂ instead of PERC. These are less toxic but less effective on tough stains. Some shops advertise "green" or "eco-friendly" cleaning, which usually means one of these alternatives, though the term itself is not regulated by any agency.

Key Takeaways

  • PERC, the most common dry cleaning chemical, is a probable carcinogen, but customer exposure during drop-off and pickup is brief and poses low risk.
  • Dry cleaning workers face much higher health risk than customers because they breathe fumes for full shifts in enclosed spaces.
  • Repeated dry cleaning weakens fabric fibers, fades colors, and can make clothes brittle and prone to tearing.
  • Letting clothes air out for 24 hours after pickup reduces the amount of chemical residue you wear against your skin.
  • Alternative solvents like hydrocarbon and liquid CO₂ exist but are less common and may not work as well on all stains.

How PERC enters your body and what it does

You absorb PERC through inhalation (breathing fumes) and skin contact. When you pick up dry-cleaned clothes, the garment still holds PERC residue—the chemical does not fully evaporate during the cleaning and pressing process. Wearing the clothes when ready means you breathe in fumes and absorb the chemical through your skin. The amount decreases over time as the solvent evaporates into the air.

At high doses and over many years, PERC exposure is linked to kidney damage, liver damage, and increased cancer risk in animal studies. Human studies of dry cleaning workers show higher rates of certain cancers, though researchers cannot always isolate PERC as the sole cause because workers may be exposed to other chemicals too. For occasional customers, the risk is much lower because exposure is infrequent and brief.

Why dry cleaning damages fabric

PERC is a harsh solvent that dissolves not just stains but also the natural oils that keep fabric flexible and strong. Each cleaning cycle strips away these protective oils, leaving fibers dry and brittle. Over time, seams weaken, colors fade unevenly, and delicate fabrics like silk and wool become prone to tearing or pilling.

The heat used during pressing also damages fabric. High temperatures can set stains permanently, shrink natural fibers, and melt synthetic ones. Buttons, zippers, and trim may crack or warp. Dry cleaning is hard on clothes by design—it is a trade-off between removing stains and preserving the garment. Clothes that are dry-cleaned frequently wear out faster than those washed at home in cool water.

Who faces the highest health risk

Dry cleaning workers are the group most affected by PERC exposure. They spend 40 or more hours per week in shops that may have poor ventilation, breathing concentrated fumes from multiple machines. Studies show workers have higher rates of bladder cancer, esophageal cancer, and kidney disease compared to the general population. The EPA has been pushing states to phase out PERC in commercial dry cleaning, but the timeline varies—some states have already banned it, while others allow it to continue.

Customers who use dry cleaning occasionally face minimal risk. People who dry-clean clothes weekly or more, or who work in dry cleaning shops, should be more cautious. Pregnant women and children may want to limit exposure because their bodies are still developing and may be more sensitive to toxins.

Steps to reduce your exposure at home

After you pick up dry-cleaned clothes, hang them outside or in a well-ventilated room for 24 hours before wearing or storing them. This allows most of the PERC to evaporate into the air instead of onto your skin. Do not hang them in a bedroom or small closet where fumes will concentrate.

When you drop off clothes, ask the dry cleaner what solvent they use. If they say PERC, ask whether they have ventilation systems in place. If the shop smells strongly of chemicals, that is a sign of poor ventilation—consider taking your business elsewhere. Some cleaners will tell you if they use hydrocarbon or CO₂ instead, which are safer options.

Wash clothes at home whenever possible. Most everyday stains come out with cold water, a stain stick, and a gentle wash cycle. Reserve dry cleaning for items labeled "dry clean only" or for stubborn stains that home washing cannot remove. The less you dry-clean, the less chemical exposure you have and the longer your clothes last.

What "green" or "eco-friendly" dry cleaning actually means

These terms are marketing language, not regulated definitions. A shop calling itself "green" might use hydrocarbon solvent, liquid CO₂, or even PERC with better ventilation systems. Ask directly what solvent they use and whether they have EPA or state certifications for emissions control.

Hydrocarbon solvents are petroleum-based and less toxic than PERC, but they are flammable and may not work as well on oily stains. Liquid CO₂ is non-toxic and non-flammable, but it is expensive and not widely available—only a handful of shops in most areas use it. Wet cleaning uses water with specialized detergents and is gentler on fabric, but it does not work on all garments and can cause shrinkage. None of these alternatives is perfect, and all cost more than PERC cleaning.

When dry cleaning is necessary and when it is not

Dry cleaning is truly necessary for fabrics labeled "dry clean only"—these are usually delicate materials like silk, wool, linen blends, or items with special finishes. Washing them in water will shrink, fade, or damage them. For these garments, dry cleaning is the right choice, and the health risk from occasional use is low.

For everyday clothes made of cotton, polyester, or blends, home washing works fine. Treat stains when ready with a stain stick or spray, then wash in cool water. This approach is cheaper, safer, and extends the life of your clothes. Save dry cleaning for special occasion wear, structured jackets, and items that truly cannot be washed at home.

Frequently Asked Questions

Can I get cancer from wearing dry-cleaned clothes?

The risk is very low for people who dry-clean clothes occasionally. Cancer risk from PERC is mainly a concern for workers exposed to high concentrations for many years. If you are worried, airing out clothes for 24 hours before wearing them reduces residual chemical exposure significantly.

Is liquid CO₂ dry cleaning really safer?

Liquid CO₂ is non-toxic and does not pose the health risks that PERC does. However, it is expensive and available only at a small number of shops. It also does not work as well on all types of stains, particularly oily ones. The trade-off is safety and environmental impact versus cleaning power and cost.

What should I do if my dry cleaner smells very strong?

A strong chemical smell indicates poor ventilation and higher fume concentration. This is a sign that workers are being exposed to unsafe levels of solvent. Consider finding a different cleaner, and if the shop is in your area, you can report it to your state's environmental protection agency or labor department.

Does dry cleaning shrink clothes permanently?

Shrinkage from dry cleaning is usually permanent because the heat and solvents can set fibers into a smaller shape. This is more common with natural fabrics like wool and linen. Checking the care label before dry cleaning and choosing a reputable cleaner who handles delicate items carefully reduces the risk.

How often is it safe to dry-clean the same garment?

There is no hard limit, but frequent dry cleaning (more than once a month) will noticeably wear out fabric faster. For work clothes or items you wear regularly, consider dry cleaning only when truly necessary—after visible stains or at the end of the season. Spot-cleaning and airing out clothes between wears extends their life.