Public Health Madison & Dane County

Indoor Air Hazards

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Common Sources of Indoor Air Quality Problems

Asbestos

Asbestos is a mineral fiber found in rock and soil. 

It is strong and resists heat so it has been used in building materials for insulation and as a fire retardant. When materials with asbestos are damaged they can release asbestos fibers. This includes things like ceiling and floor tiles, pipe insulation, and others.

Health Concerns

Exposure to asbestos may increase your risk for lung disease and cancer.

How to Stay Safe

Asbestos is only a danger it if is damaged and crumbly, or is in dust form. Not all building materials contain asbestos. The only way to know is to test. For information on testing, contact the Wisconsin State Occupational Health Lab at (608) 224-6210.

More Information

Carbon Monoxide or other Combustion Products

When you burn natural gas, fuel oil, wood, or other fuel, it creates carbon monoxide (CO), nitrogen dioxide and other air pollutants.

Health Concerns

  • Carbon monoxide is a gas with no color or smell. It causes headaches, nausea, and sleepiness. It can cause sudden illness and can be deadly when you are exposed to high levels.
  • Nitrogen dioxide irritates your lungs and air passages. It can make asthma and allergies worse.
  • Depending on the fuel burned, other pollutants may be produced that have a wide range of health effects.

How to Stay Safe

  • Make sure all combustion appliances (stove, furnace, water heater, fireplace, grills, etc.) are vented to the outside and work properly. Have your furnace inspected once a year to make sure it works properly.
  • Put carbon monoxide detectors in your home and make sure they work. Wisconsin State law requires them.
  • Don't run your car or other equipment that runs on gas in a garage or enclosed spaces.
  • Never use unvented combustion appliances indoors.

Call 911 or your utility provider if:

More Information

Household Chemicals (cleaners, disinfectants, pesticides)

When you use every day household cleaners and chemicals they can cause indoor air quality problems.

Health Concerns

If you use them wrong, overuse them, or store them unsafely, different health effects can happen. 

How to Stay Safe

  • Follow directions carefully when using or storing them.
  • Use only the amount you need to get the job done. More is not always better.
  • Buy only what you need. Extra chemicals can create storage problems and can spill.
  • Look for the least toxic product that will do the job.
  • Use Integrated Pest Management (IPM) to help control pests in and around your home.
  • Throw away and recycle chemicals safely. Get information from Dane County Clean Sweep.

Mold, Dust and Biological Contaminants

Most homes have dust, mold, and other contaminants. In many cases they are not considered dangerous. There can be health problems, depending on

  • The types of dust or mold
  • If contamination is high
  • Your health

Health Concerns

If you have asthma and allergies, you may not feel well when you are exposed to certain types of dust, mold, and other contaminants. Anyone can have eye, nose, or throat irritation from high levels of dust, mold, or other contaminants.

More Information

Check out the resources below for information on health effects from mold and how to clean up and prevent mold. 

  • Mold Information, WI Department of Health Services
    • Includes a list of contractors who can help you with moisture, air quality, and mold issues in your home
  • Mold Information, Centers for Disease Control and Prevention

Radon

Radon is an invisible radioactive gas that has no smell or taste. It occurs naturally in the ground.

Health Concerns

Radon causes lung cancer and is found in many homes throughout Wisconsin and Dane County.

How to Stay Safe

  • Testing is the only way to know if you have radon in your home. Hardware and home stores sell low-cost radon test kits (usually under $25). We also sell kits for $10 each (see below).
  • If testing shows a radon problem, you will need to install a system that will prevent radon from building up in your home. The system should be installed by a certified mitigation contractor.
  • Radon reduction systems can reduce radon levels in your home by up to 99%. Radon reduction systems can be built into new homes.

More Information

  • Call the South-Central Radon Information Center at (608) 243-0392
  • Buy a test kit at one of our offices, Monday - Friday. Cash or check only.
    • The Atrium - 2300 S. Park St., Suite 2010, Madison, 7:45am - 4:30pm
    • East Washington Avenue Office - 2705 E. Washington Ave., Madison, 8:30am - 4:30pm 
  • Radon Information, WI Department of Health Services
  • Radon Information, US Environmental Protection Agency

Secondhand Smoke

Burning tobacco products causes secondhand smoke.

Health Concerns

Secondhand smoke causes cancer, and eye and throat irritation.

How to Stay Safe

  • Don't allow smoking in your home or your car.
  • All Wisconsin workplaces are covered by a smoke-free workplace law. This includes restaurants, taverns, bars, and bowling centers. Report a violation or learn more about the law.
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Air Quality