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Where Does Indoor Air Pollution Come From?

Where does indoor air pollution come from? Some ideas to finish your answer may come to your mind, yet, let us make it more comprehensive to protect your health.

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Indoor air pollution is increasingly serious in modern life. They find solutions to cope with this issue to keep life healthy. Still, before going inside a concise guide on encountering this problem, get one thing clear first: ‘’Where does indoor air pollution come from?’’

Have the same concerns? Look no further than this article. We will unveil all the facts you need. 

Where does indoor air pollution come from

Where Does Indoor Air Pollution Come From?

Regarding indoor air pollution, there are tons of reasons you can blame for. Still, we’ll go in short with 9 major sources:


Asbestos is mostly found in ‘long-term’ structures. It often shelters in the  pipe and furnace insulation materials, millboard, asbestos shingles, textured paints, floor tiles, ceiling tiles, panels, and other coating materials.

Asbestos-containing materials in excellent condition rarely pose a health danger. Even yet, sanding, cutting, or renovating on such materials might unleash the substance.

Asbestos fibers, in large volumes, cause lung cancer, asbestosis, and mesothelioma.

Biological Pollutants

It’s a catch-all term, including animal dander, cat saliva, viruses, bacteria, mites, cockroaches, pollens, pests, insects, mold, and dust indoor air pollution

Biological Pollutants
Biological Pollutants

Humidity is the main source of biological pollutants. Remarkably, water-damaged materials, standing water, or wet surfaces are great conditions for mildews, molds, insects, and bacteria. 

Hence, keeping the humidity inside from 30 to 50 percent is ideal at all.

Carbon Monoxide (CO)

It’s a colorless, toxic, and odorless gas. CO can be a fatal factor with a huge amount. Some sources of this gas are: 

  • Gas space heaters and unvented kerosene 
  • Leaking furnaces and chimneys
  • Back-drafting from gas water heaters, furnaces, fireplaces, and wood stoves
  • Gas stoves
  • Gasoline-powered equipment
  • Automobile exhaust
  • Tobacco smoke

The CO exposure’s effects can vary greatly depending on age, overall health, and the exposure’s length and concentration. 

Nitrogen Dioxide (NO2)

Nitric oxide (NO) and nitrogen dioxide (NO2) are the two cases of indoor air pollution examples. They’re the most common nitrogen oxides. Both of these gasses are poisonous, with NO2 being a higher danger. It comes from:

  • Combustion processes, such as tobacco smoke and kerosene heaters, are the principal contributors indoors.
  • Combustion appliances without a chimney
  • Welding on vented appliances


Pests cause diseases, spoil food, wreak havoc! They harm our life in many ways. Therefore, potent pesticides are widely available to control pests.


Still, they’re like a double-edged knife, causing health risks like nerve damage, eye, ear, throat irritation, and even cancer.

Following the instructions can somewhat avoid their impacts. Be selective and smart in choosing exterminators or mixing pesticides. 

Also, natural methods are advisable, as they are human friendly. 

Radon (Rn)

Indoor radon is odorless, radioactive, and colorless, and it mainly derives from uranium in the rock or soil. When uranium is broken down, radon gas is released.

This substance usually penetrates homes through cracks in concrete floors, walls, or dirt floors, sumps, and floor drains.

A significant level of indoor radon will become a health hazard. Lung cancer is a dreadful thing to cause.

As anticipated by the EPA, radon is responsible for around 14,000 deaths annually in the U.S. The figure varies between 7,000 and 30,000.

Secondhand Smoke/ Environmental Tobacco Smoke

Tobacco smoke in the environment is a mixture of products from the combustion end, such as cigarettes, pipes, and cigars.

As seen on the ETS’s indoor air quality standards chart and findings, there are nearly 4,000 chemicals and 40% of which are carcinogenic or irritant.

Second-hand or passive smoking is the term for ETS. ETS affects children’s lungs more than it does adults’ lungs. It causes an almost doubling of the frequency of Pneumonia, Bronchitis, and Bronchiolitis in newborns and young children up to the age of three.

Stoves and Heaters

The natural heaters and stoves conveniently compromise your health. Utilizing them, chances are toxic gasses like formaldehyde, monoxide, nitrogen dioxide (NO2), and (CO) impact your body. 

In winter, people are less likely to open the windows and use these stoves. In these cases, they will leave us with risks. 

Nonetheless, a ventilation hood helps combat this problem. Also, limiting your use frequency also helps. An electric model is an excellent substitute if you’re reluctant for a ventilator hood.

Volatile Organic Compounds (VOCs)

VOCs, the household paints’ primary component, can cause health issues in many ways. It contains benzene and methylene inside. 

This substance gives you a headache, even ends up with cancer. 

This is the answer to why you feel uncomfortable standing near paints. 

The good news is that many paints products have fewer or no VOCs. It’s worth purchasing health-friendly items to protect yourself.


Why Is Good Indoor Air Quality Important?

The indoor air quality will impact our health directly, no doubt! Everyone spends most of their time indoors, so keeping a good atmosphere inside plays a crucial role in avoiding short-term and long-term health issues, serious complications, and discomfort. 

As aforementioned, a slew of indoor air pollution factors endangers your family. Be smart and sober to prevent them!

In short, the importance of good indoor air quality is for a healthy life. 

How To Reduce Indoor Air Pollution? 

We’ve listed out 11 best ways on how to improve indoor air quality effectively:

1. Open windows: it’s the easiest way to refresh the indoor air. 

2. Quit smoking: it’s a must. Everyone can see how secondhand smoke impairs respiratory health and causes lung cancer annually. 

secondhand smoke
secondhand smoke

3. Bath your pets and wash their bedding often: you will alleviate allergy-causing dander this way. 

4. Use exhaust/run fans: adequate ventilation is vital in improving indoor air. Run fans work wonders in eliminating cooking fumes and steam. 

5. Put down a doormat: Wiping shoes reduces pollutants carried into the house. Also, a shoes-off rule is advisable. 

6. Change filters: A forced-air heating and cooling system needs altering filters often. 

7. Don’t cover up odors: Avoid scented candles, air fresheners, incense, and other odor-masking fragrances. They all may trigger asthma. 

8. Try an air purifier: it does the trick in removing indoor impurities, allergens, and pollutants. 

9. Vacuum often


10. Utilize a microfiber dusting cloth: It captures more dust than a cotton rag.

11. Store chemicals safely: a smart cookie will prioritize this one at all costs. Keep these products out of your living areas. 

How Is Indoor Air Quality Measured?

To this end, a VOC sensor is what you need. It specializes in quantifying various VOCs’ levels, notably detecting formaldehyde. 

Aside from that, carbon dioxide meters and radon detectors will alarm if these gasses’ levels reach a harmful rate. 

Wrapping Up

Now that you grabbed the well-rounded answer to “Where does indoor air pollution come from?’’ 

Hopefully, our informative writings bring bliss and keep you healthy. 

Don’t be reluctant anymore! Take action now! A good quality indoor air never lets you down!


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