Our noses can mislead us. While a pleasant scent may make a product seem appealing or a room feel clean, many household fragrances and cosmetics release chemicals that harm indoor air quality. We often judge cleanliness by smell — the sharp tang of bleach, the manufactured freshness of “spring rain,” or seasonal scents like pumpkin spice — but true cleanliness is the absence of lingering residues and contaminants. Scents trigger powerful memories and emotions because scent receptors sit near memory centers in the brain, yet the aromas that make us feel comfortable are frequently the same sources of harmful airborne compounds.
These pleasant-smelling products can release volatile organic compounds (VOCs) and other pollutants that negatively affect health. The more I’ve studied indoor air, the more I see that the air we breathe is one of the most significant and underestimated household hazards. Unlike caustic cleaners used occasionally and handled cautiously, airborne contaminants are inhaled constantly by everyone who occupies a space — adults, children, pets — and can persist for hours or days.
VOCs and other airborne pollutants are readily absorbed by the lungs and enter the bloodstream. Many of these compounds can cause headaches, dizziness, fatigue, respiratory irritation, and cognitive impairment; some are linked to more serious long-term risks. Because indoor air can contain VOC levels several times higher than outdoor air, and many VOCs originate from everyday consumer products, it’s crucial to limit what we intentionally introduce into our indoor environments.
Why scent has become a top concern for me
I used to point to drain cleaners and oven cleaners as the most dangerous household hazards because their chemical strength can cause severe injury and environmental harm. People tend to respect those products, using gloves and precautions. But the real risk I now worry about more is the continual exposure to contaminated indoor air. We often add VOCs to our air for the sake of scent, convenience, or a perception of cleanliness without recognizing the persistent health impacts.
Because indoor contamination affects everyone in a space and can linger, preventing harmful compounds from entering the air in the first place is essential. This article focuses on those substances we purposefully emit into our homes — fragrances, cleaning sprays, cosmetics, and other common sources — and practical steps you can take to reduce them.
What are VOCs and where do they come from?
Indoor air contains many pollutants like dust, pollen, pet dander, mold spores, and microbes. Ventilation and filtration help reduce those particles, but another category we can proactively reduce is volatile organic compounds (VOCs). “Volatile” refers to a substance’s tendency to evaporate at room temperature. VOCs are carbon-based chemicals that readily become vapors or gases and include thousands of compounds, some of which are hazardous.
Common problematic VOCs include benzene (a known carcinogen) and formaldehyde (a probable carcinogen). VOC exposure can lead to headaches, breathing difficulties, skin and eye irritation, asthma flare-ups, and other symptoms. Some VOCs are odorless, so the absence of smell does not guarantee safety; routine ventilation matters even if you don’t detect anything.
How VOCs impact us
We spend the vast majority of our time indoors, which increases our exposure to indoor pollutants. With improvements in outdoor air quality from vehicle emissions controls, indoor air can now be worse than outdoor air by a wide margin. Studies show that half of indoor VOCs originate from consumer products. Routine items — cosmetics, perfumes, cleaning products, air fresheners, and fragranced laundry products — often contain VOCs designed to provide long-lasting scent.
Because these fragranced products are used daily and often without thought, they are a major source of indoor VOCs. Fortunately, many effective choices and changes can reduce the amount of harmful chemistry in your home.
9 ways to keep harmful VOCs out of your air
1. Choose your cleaners carefully
Make simple cleaners at home using low-VOC ingredients like soap, baking soda, vinegar where appropriate, and water. Avoid chlorine bleach and products with vague “fragrance” labels. Never mix store-bought chemicals unless the manufacturer explicitly instructs you to do so, because mixing can create dangerous gases. Sprays increase airborne particles; using a bucket and cloth reduces aerosolization.
2. Go easy on essential oils
Essential oils release organic compounds — primarily terpenes — that create their scent. Terpenes can irritate sensitive individuals and pets, and at high concentrations they can react with ozone to form formaldehyde. Low concentrations in cleaning or body-care products are less problematic, but avoid diffusing concentrated essential oils into the air routinely.
3. Break up with fabric softener
Fabric softeners and many laundry fragrances are designed to cling to fabrics for weeks, releasing strong VOCs that can travel far beyond your home. These residues indicate the fabric isn’t truly clean and can be inhaled by occupants. Transition to unscented detergents or minimal, fragrance-free options so laundry smells like nothing rather than a persistent synthetic perfume.
4. Ditch the air fresheners
Anything that intentionally scents the air — sprays, plug-ins, wax melts, candles, diffusers, potpourri, sachets — releases VOCs. Clean air should smell like nothing. If you want mild natural scent, try simmering spices briefly on the stove or baking to create a pleasant aroma without synthetic chemicals. Natural sources like citrus peels or crushed herbs offer transient, low-impact scent.
5. Scrutinize your cosmetics
Personal care products travel with you and often expose you to VOCs continuously. Fragrance is the most common source of problematic chemicals in cosmetics. Many products list “fragrance” as a single ingredient, which can conceal hundreds of possible chemicals, including known or suspected toxins. Prioritize transparency: choose products with full ingredient lists or third-party certifications that evaluate fragrance safety. Focus first on leave-on products (lotions, perfumes) because they give higher exposure than wash-off items.
6. Air out new textiles and furnishings
New furniture, carpets, and textiles often off-gas manufacturing chemicals. Whenever possible, let new items air outside or in a well-ventilated area before bringing them into frequently occupied rooms. Continue to ventilate spaces after introducing new items.
7. Dry-clean mindfully
Perchloroethylene (Perc), a common dry-cleaning solvent, emits hazardous VOCs. Avoid dry-clean-only clothing when possible. If you must use dry-cleaned items, air them outdoors for several hours before storing or wearing.
8. Be wary of “green” label claims
Many marketing terms lack strict regulation. “Green,” “natural,” or “eco” claims don’t guarantee low VOC emissions. Read ingredient lists, seek independent certification, and use trusted databases or guides to evaluate products. Certifications from recognized third parties provide stronger assurance than marketing alone.
9. Don’t store chemicals
Buy only what you need. Containers can leak vapors over time, gradually raising indoor VOC levels. Dispose of unwanted hazardous materials — paints, solvents, adhesives, certain cleaners — through designated household hazardous waste programs rather than tossing them in the trash or draining them into sewers.
Note the difference between “Fragrance-free” and “Unscented”
“Unscented” products may still contain masking fragrances to neutralize other odors. “Fragrance-free” should mean no added fragrance ingredients. Always read ingredient lists to be sure a product truly lacks fragrance compounds.
Change the smell of clean
When you stop introducing synthetic fragrances and VOCs, your sense of “clean” will evolve. You may miss strong manufactured scents at first, but over time you’ll appreciate natural aromas like freshly peeled citrus or crushed mint. Clean indoor air usually smells like nothing, and that absence of synthetic scent is healthier. For occasional uplifting scents, opt for real food-based aromas — baking cookies, simmering spices, or fresh herbs — rather than chemical air fresheners.
Further reading:
- How To Clean Your Indoor Air
- Use This, Not That – Housecleaning with Dr. Bronner’s
- How to Clean an Oven and Stovetop