Indoor Air Quality | Vermont Department of Health
Source: http://healthvermont.gov/environment/healthy-homes/indoor-air-quality
Archived: 2026-04-23 17:14
Indoor Air Quality | Vermont Department of Health
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Translations for you
Indoor Air Quality
Healthy Homes
Carbon Monoxide
Cleaning Safely
Financial Assistance
Home Renovations and Your Health
Indoor Air Quality
Lead Hazards and Lead Poisoning
Mold
Pests and Bed Bugs
Radon
Safe Home Environment
Air Quality in Your Home
Did you know that we spend about 90% of our time indoors? Air pollution indoors can be as high, and sometimes higher, than outdoor levels. The quality of the air you breathe can affect your health.
Indoor Air Pollutants
The air you breathe inside your home can become polluted from sources that come from both inside and outside.
Indoor air pollutant examples
Outdoor air pollutant examples
Carbon monoxide
from improperly vented or improperly working heaters, gas stoves and dryers
Off-gassing
volatile organic compounds
(VOCs) from glues, paints and varnishes
Wood smoke
from burning wood indoors
Secondhand smoke
Mold
Chemicals in
household cleaning products
, personal care products and pesticides
Pet dander and dust mites
Hobbies like 3D printing, welding or woodworking
Idling cars near windows or in an attached garage
Backyard trash burning
Wildfire smoke
Radon
Pollen
Dust from roadways, agriculture and construction
Industrial and commercial sources like manufacturing, dry cleaners and gas stations
Important Links
Cleaning Safely
Wood Heat and Indoor Air Quality
Asthma and Lung Disease
Quit Tobacco and Nicotine
Health effects of breathing polluted indoor air
Breathing air pollutants can lead to health effects. The health effects you may experience depend on the amount you breathe in, the length of time you are exposed, as well as your family history, age and general health. Some people are especially sensitive to air pollutants, including babies, young children, older adults, and people with breathing problems.
Air pollution can make it harder to breathe if you have asthma or other respiratory diseases. It can also trigger allergic reactions and may make it more likely for you to have a heart attack or stroke. Some pollutants, like carbon monoxide, can cause headaches, nausea, vomiting, brain damage and even death. Others, like radon, can increase your risk of getting cancer.
Improve your indoor air quality
Using source control, ventilation and filtration can help reduce your exposure to indoor pollutants and improve indoor air quality.
Source control
Removing or reducing sources of pollution – called source control – is the best way to improve indoor air quality. Examples of source control include:
Swapping toxic cleaners for safer cleaners like soap and water.
Using
integrated pest management
to monitor and control pests instead of using pesticide sprays and foggers.
Testing for radon and fixing a radon problem if found.
Decluttering and damp dusting to reduce asthma triggers, allergens, pests and pollutants.
Keeping windows closed when outdoor air quality is poor.
Avoiding smoking or using e-cigarettes indoors.
Having your combustion appliances inspected annually to make sure they are working properly.
Ventilation
Bringing in fresh, outdoor air helps dilute indoor air pollutants. There are two types of ventilation:
Natural ventilation, which includes opening windows and doors. Avoid doing this if the air quality outdoors is unhealthy because of wildfire smoke or other pollution.
Mechanical ventilation, which includes bathroom and kitchen exhaust fans and may include your home’s heating, ventilation and air conditioning (HVAC) system.
Filtration
Using air filters helps remove particles from the air. There are two ways to filter your home’s air:
Using and maintaining filters as part of your home’s heating, ventilation and air conditioning (HVAC) system.
Using a portable air cleaner, also known as an air purifier.
Learn more about filters and portable air cleaners in EPA’s
Guide to Air Cleaners in the Home
More Information
Indoor Air Quality (EPA)
Agency for Toxic Substances and Disease Registry
Topics:
Air Quality
|
Chemical Contaminants
|
Healthy Homes
Last Updated:
April 21, 2026
Skip to main content
MENU
x
CLOSE
Translations for you
Indoor Air Quality
Healthy Homes
Carbon Monoxide
Cleaning Safely
Financial Assistance
Home Renovations and Your Health
Indoor Air Quality
Lead Hazards and Lead Poisoning
Mold
Pests and Bed Bugs
Radon
Safe Home Environment
Air Quality in Your Home
Did you know that we spend about 90% of our time indoors? Air pollution indoors can be as high, and sometimes higher, than outdoor levels. The quality of the air you breathe can affect your health.
Indoor Air Pollutants
The air you breathe inside your home can become polluted from sources that come from both inside and outside.
Indoor air pollutant examples
Outdoor air pollutant examples
Carbon monoxide
from improperly vented or improperly working heaters, gas stoves and dryers
Off-gassing
volatile organic compounds
(VOCs) from glues, paints and varnishes
Wood smoke
from burning wood indoors
Secondhand smoke
Mold
Chemicals in
household cleaning products
, personal care products and pesticides
Pet dander and dust mites
Hobbies like 3D printing, welding or woodworking
Idling cars near windows or in an attached garage
Backyard trash burning
Wildfire smoke
Radon
Pollen
Dust from roadways, agriculture and construction
Industrial and commercial sources like manufacturing, dry cleaners and gas stations
Important Links
Cleaning Safely
Wood Heat and Indoor Air Quality
Asthma and Lung Disease
Quit Tobacco and Nicotine
Health effects of breathing polluted indoor air
Breathing air pollutants can lead to health effects. The health effects you may experience depend on the amount you breathe in, the length of time you are exposed, as well as your family history, age and general health. Some people are especially sensitive to air pollutants, including babies, young children, older adults, and people with breathing problems.
Air pollution can make it harder to breathe if you have asthma or other respiratory diseases. It can also trigger allergic reactions and may make it more likely for you to have a heart attack or stroke. Some pollutants, like carbon monoxide, can cause headaches, nausea, vomiting, brain damage and even death. Others, like radon, can increase your risk of getting cancer.
Improve your indoor air quality
Using source control, ventilation and filtration can help reduce your exposure to indoor pollutants and improve indoor air quality.
Source control
Removing or reducing sources of pollution – called source control – is the best way to improve indoor air quality. Examples of source control include:
Swapping toxic cleaners for safer cleaners like soap and water.
Using
integrated pest management
to monitor and control pests instead of using pesticide sprays and foggers.
Testing for radon and fixing a radon problem if found.
Decluttering and damp dusting to reduce asthma triggers, allergens, pests and pollutants.
Keeping windows closed when outdoor air quality is poor.
Avoiding smoking or using e-cigarettes indoors.
Having your combustion appliances inspected annually to make sure they are working properly.
Ventilation
Bringing in fresh, outdoor air helps dilute indoor air pollutants. There are two types of ventilation:
Natural ventilation, which includes opening windows and doors. Avoid doing this if the air quality outdoors is unhealthy because of wildfire smoke or other pollution.
Mechanical ventilation, which includes bathroom and kitchen exhaust fans and may include your home’s heating, ventilation and air conditioning (HVAC) system.
Filtration
Using air filters helps remove particles from the air. There are two ways to filter your home’s air:
Using and maintaining filters as part of your home’s heating, ventilation and air conditioning (HVAC) system.
Using a portable air cleaner, also known as an air purifier.
Learn more about filters and portable air cleaners in EPA’s
Guide to Air Cleaners in the Home
More Information
Indoor Air Quality (EPA)
Agency for Toxic Substances and Disease Registry
Topics:
Air Quality
|
Chemical Contaminants
|
Healthy Homes
Last Updated:
April 21, 2026