Indoor air quality can have a significant effect on your health. Studies show that people spend 65 to 90 percent of their time indoors, and indoor air can be two to five times more polluted than outdoor air. The young, elderly, chronically ill, and those with respiratory or cardiovascular disease are often the most impacted by poor indoor air quality.

Asbestos

Asbestos health effects, where it can be found, and what to do if it is in your home.

Asthma

Asthma triggers, management, and asthma home visits for children in certain counties.

Bleach Mixing

Mixing bleach with cleaning products can be harmful to your health.

Carbon Monoxide

Between 1990 and 2005, over 1,000 Washington residents died from carbon monoxide poisoning. Learn how to prevent carbon monoxide poisoning.

Fiberglass

Fiberglass health effects and ways to prevent exposure.

Flood Cleanup

Entering and cleaning a flooded house.

Formaldehyde

Formaldehyde health effects, products it's found in, and how to reduce exposure.

Green Cleaning

Toxic free tips from Ecology for safer cleaning and use of chemicals in homes, schools, and workplaces.

Hiring a Contractor

Hiring a contractor to investigate indoor air quality problems or mold remediation. 

Home Health Assessment

People in the Seattle/King County area can schedule a free Master Home Environmentalist assessment.

You can do your own assessment by getting the Do It Yourself HEAL Form from the American Lung Association.

Mercury

Breathing mercury vapor from broken fluorescent lights or old mercury thermometers can be harmful to your health.

Mold

Mold prevention and how to clean it up. For Spanish, see preguntas frecuentes acera del moho.

Outdoor Air

Outdoor air and smoke from fires can affect indoor air.

Pesticides

Use of integrated pest management can reduce or eliminate the need for pesticides, which can help prevent pesticide illness. 

Radon

Radon is a radioactive gas, the second leading cause of lung cancer, and can sometimes build up in buildings.

Renters and Landlords

Renters and landlords have responsibilities to help solve water and mold problems.

School Indoor Air Quality

Indoor air quality school links.

School Indoor Air Quality Best Management Practices (PDF 1MB)

Tobacco Smoke

Tobacco remains the main cause of preventable disease and death in Washington State, killing about 7,500 people every year. Learn more about the effects of secondhand smoke and the smoking in public places law.