Is it better to air outside, or is the house safer? Design by Zvia Kazioff/Amit Gosher
Dyson unveils the results of its first global air quality data study. This is the largest study on indoor air quality. The study looked at indoor air quality using data collected by more than 2.5 million Dyson filters from 2022 to 2023. The scope of the data reached tens of billions of points and presents a representative picture of indoor air quality in cities and countries around the world.
Dyson's findings provide valuable insight into true pollution levels in homes around the world, helping to understand daily, monthly and seasonal pollution patterns. The data obtained constitute a significant research tool and tools for positively influencing the health of all of us.
The study focused on two types of pollutants: PM2.5 and volatile erogenous compounds (VOCs). PM2.5 refers to small particles about 2.5 microns in diameter. These particles are invisible to the naked eye and can be inhaled. VOCs are gas contaminants including gasoline and formaldehyde that can be emitted from activities such as cleaning or cooking as well as products including deodorants and body sprays, candles, furniture and furniture.
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According to the study, all countries studied exceed the World Health Organization's annual guidelines for PM2.5 (5 μg/m11). The most prominent in this category are: India with an 6x deviation, China 4x, Turkey and UAE 3x, South Korea, Romania, Mexico, Italy with a deviation of more than 22x the required value.
According to the data collected in Israel, it was found that Israel is located below the global average. The most polluted month measured among devices in Israel was December, during which 5.2 PM5.210 and 13 VOC values were measured. In July, the lowest score was obtained with 2 PM5.175 and less than 2 VOC. In most of the aforementioned months, Israel is below or above the global average. The highest pollution during the day is measured in the early morning and evening hours and lowest in the afternoon.
The unflattering table is led by Delhi, Beijing, Shanghai, Shenzhen, Busan, Istanbul, Dubai, Seoul, Mexico City and Vienna. These cities were found to exceed the WHO's annual guidelines at PM5.14 values, with India's capital exceeding almost 6 times, Beijing by more than 5 times, Shanghai by more than 5 times, Shenzhen by almost 4 times, Busan by 4 times, Istanbul and Dubai by almost 3 times. Other cities that exceeded were Seoul, Mexico City, Vienna, Milan, Rome, Hong Kong by more than 3 times, Madrid, Bangkok, Manila by almost 2 times, Berlin, Fukuoka, and Cologne by more than 5.2 times.
Almost all of the homes they sampled had worse air quality than the exterior. All but four countries have exceeded outdoor PM5.2 levels for six months or more, including the UK and Germany. Only homes in India, Norway, Poland and Finland consistently showed household PM5.2022 levels below external levels (less than six months in 2).
In February, seven countries noted the highest internal PM5.2 level compared to the outdoor; In Germany, internal PM5.2 infection was more than double outside, and in Austria indoor PM5.95 during the same period was 20% higher. 31 of the 2 countries studied saw annual average indoor air quality exceeding outdoor air quality when looking at PM5.<>; Austria, Spain, Australia, Canada, the United Kingdom, Denmark and the Netherlands are some of the standouts.
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