Where does Indoor Air Bacteria Come From?

Researchers from University of California, Berkeley, set out to find the main sources for air bacteria in our homes. They analysed 29 homes in the San Francisco Bay area by taking samples from places such as kitchen surfaces, carpets and toilets. As a result, they came up with these sources.

8 Main Sources of Indoor Bacteria

Indoor bacteria can come from various sources, but there are some common culprits that can be the biggest contributors. Here is some of the list of them:

1. Floors and Carpets: Floors and carpets holds a top position on the list. The reason is due to walking on a carpet or vacuuming stirs up a great amount of air bacteria and releases it into the surrounding air.
2. Tap Water: One thing that surprised the researchers was that tap water is such a main source for bacteria. They are not sure how germs from our drinking water is released into the air to such a high extent.
3. Toilet: The researchers had originally wondered whether flushing a toilet could contribute to spreading bacteria from feces into the air. But (luckily) they found that this source tracked only 0.04 percent of microbes.
4. People: People are one of the primary sources of indoor air bacteria. We shed millions of bacteria every day through our skin, hair, and breath. When we sneeze or cough, we release even more bacteria into the air. This is why it’s important to cover your mouth and nose when you sneeze or cough, and to wash your hands regularly.
5. Pets: Another potential source of germs indoors is pets. Pets’ skin and hair carry microorganisms that they shed. They might also bring in external bacteria. To lessen the quantity of bacteria your pets shed, it’s crucial to frequently clean and groom them.
6. Moisture: Moisture is another factor that can contribute to indoor air bacteria. When there is excess moisture in the air it can create a breeding ground for bacteria and other microorganisms. This is why it is important to control humidity levels in your home especially in areas like the bathroom and kitchen.
7. HVAC systems: Bacteria in indoor air can also come from HVAC systems, which include air conditioners and heaters. These systems can gather germs and other microorganisms if they are not properly maintained. To limit the quantity of bacteria in your home, it’s crucial to frequently clean and maintain your HVAC system.
8. Poor Ventilation: Poor ventilation can also contribute to indoor air bacteria. When there is not enough fresh air circulating in your home it can create a stagnant environment where bacteria can thrive. It is important to open windows and use fans to circulate fresh air throughout your home.

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