Air pollution is usually considered an outdoor concern, yet the air circulating through our homes can have a direct impact on the artworks displayed inside them.
Simply opening a window can allow fine particles, dust and gaseous pollutants to enter, particularly in areas affected by heavy traffic, industry, wildfire smoke or other sources of poor air quality. Once indoors, these pollutants can settle on surfaces or interact with sensitive materials, contributing to gradual changes that may not become noticeable for years.
From historic oil paintings and works on paper to modern art and sculpture, understanding the relationship between air quality and different materials is an important part of preventive conservation. Fortunately, there are practical steps collectors can take to reduce exposure and create a safer environment for their collection.
Our team of art conservators assess artworks for signs of deterioration and advise on preventive measures to help protect paintings, paper, sculpture and modern materials. If you have noticed unusual surface deposits, discoloration or other changes, contact our team for professional conservation advice.
What is entering your home?
Outdoor pollutants include fine particles such as soot, dust, ozone, nitrogen dioxide and sulfur compounds. These can enter through open doors and windows as well as through gaps in a building and some ventilation systems.
This is not solely an issue for heavily industrialized areas. The American Lung Association’s 2026 State of the Air report found that 152.3 million Americans (that is 44% of the population) live in places receiving a failing grade for unhealthy ozone or particle pollution. Los Angeles remained the country’s worst metropolitan area for ozone pollution, while Bakersfield ranked worst for year-round particle pollution.
Outside major cities, sources can be different. Wildfire smoke can affect communities hundreds of miles from a fire, while dust storms are particularly relevant in the Southwest. Sea-salt particles may also contribute to corrosion risks in coastal environments.
What does air pollution do to artworks?
Different materials react differently, below are just a few examples of what long term exposure to contaminants may cause.
Paintings: fine particles can become embedded in textured paint and varnish, changing the appearance of the surface. Pollutants may contribute to fading, discoloration, oxidation, loss of gloss and changes to certain pigments.
Paper: prints, watercolours, photographs and documents are particularly vulnerable because paper readily absorbs surrounding gases and moisture. Nitrogen dioxide, ozone and fine particles can contribute to deterioration, including discoloration, fading and weakening of cellulose.
Modern & Contemporary Art: mixed media collections can contain plastics, rubber, synthetic paints, photographs and unconventional materials. Ozone and other pollutants can accelerate deterioration in some plastics and rubbers, making the individual materials particularly important when assessing risk.
Sculpture & Decorative Objects: porous stone, unglazed ceramics and textured surfaces can trap dirt and soot, while pollutants and salts can increase corrosion risks for certain metals.
Your Art Pollution Checklist
1. You do not need to keep your home permanently sealed. Instead, consider the conditions immediately around your collection.
2. Check your local Air Quality Index (AQI) before opening windows for long periods, particularly during wildfire smoke, heavy traffic pollution or other poor-air-quality events. Keep vulnerable artworks away from frequently opened windows and exterior doors.
3. For important collections, consider an indoor PM2.5 air-quality monitor alongside your existing temperature and relative humidity monitoring. Tracking conditions over time can reveal patterns that are easily missed day to day.
4. Good-quality HVAC filtration and appropriately selected portable filtration can help reduce airborne particles. Works on paper can receive additional protection through conservation-quality glazed framing, while particularly sensitive objects may benefit from enclosed display.
5. Finally, do not attempt to clean it yourself. A gray or dark deposit, unexpected dullness or dirt embedded in a painting’s texture should not automatically be wiped away. Incorrect cleaning can cause considerably more damage than the pollution itself. Contact our team if you believe professional cleaning is required for a free estimate.
Contact our Experts
Pollution damage is often gradual, making early identification and prevention particularly important. If you are concerned about air quality in your home, have noticed changes to an artwork or simply want to better protect a valuable collection, our conservation team can help.
From individual artworks to complete collections, we can assess condition, identify environmental risks and recommend appropriate conservation or preventive measures.
Professional Art Restoration Services
Fine Art Restoration Company works with collectors, insurance companies and institutions across the United States, offering conservation, restoration, condition reports, collection care, and coordinated fine art transportation to ensure your artwork receives museum-quality care.
We can assist with:
- Modern & contemporary artwork restoration
- Antique oil paintings conservation
- Watercolors, drawings and print restoration
- Antique and modern frame repair
- Ceramics and sculpture restoration
- Collection care and condition reports
- Insurance claims including restoration after fire contamination, water exposure or accidental damage
If you’re concerned about the condition of your artwork, or simply want expert advice on displaying and caring for your collection, we’d be delighted to help. Contact our team today to arrange a professional assessment or discuss your conservation needs.