Indoor Air Quality and Cat Health

How household chemicals, plants, and poor ventilation affect indoor cats, and what owners can do to create safer living environments.

Key Facts

Cats spend up to 90% of their time indoors, making air quality critical to their health
Many common houseplants including lilies are toxic to cats
Aerosol sprays, scented candles, and essential oils can irritate feline respiratory systems
Cats are especially sensitive to permethrin, found in some insecticides and dog flea treatments
Secondhand smoke significantly increases cats' risk of lymphoma and oral cancer

Welfare Considerations

Indoor cats rely entirely on their owners to create a safe environment. Unlike outdoor cats who can escape harmful substances, indoor cats are continuously exposed to whatever is present in the home. Many owners are unaware that products marketed as safe or natural — including essential oil diffusers and certain cleaning products — can cause significant harm to cats. Chronic low-level exposure to respiratory irritants can cause ongoing discomfort and long-term health problems that are difficult to attribute to their actual cause.

What You Can Do

Remove or place all lily plants (including Easter, Tiger, and Asiatic varieties) out of reach
Ventilate rooms well when using cleaning products and store them securely
Avoid aerosol sprays and scented candles in areas where your cat spends most time
Never use essential oil diffusers in small spaces where cats cannot leave the room
Ensure your home is smoke-free and your cat is never in a vehicle where smoking occurs