PM2.5 annual average: Singapore exceeds WHO annual guidelines by close to 2 times
When looking globally at the indoor air quality data from Dyson connected purifiers throughout 2022, there are some surprising results when ranking countries on their average PM2.5 level. Whilst India, China and Turkey occupy the top three spots, four countries from Southeast Asia, including Singapore, occupied the list of top 15 countries globally with the worst indoor annual average PM2.5 levels.
With PM2.5 annual indoor average levels at 14.21μg/m³, Singapore exceeds the recommended annual exposure level of 5μg/m³ by 180%. The data also found that monthly indoor PM2.5 levels in Singapore exceeded WHO guidelines across all months in the year, with a low of 11.28μg/m³ in December 2022 and a high of 17.95μg/m³ in April 2022.
Meanwhile, PM2.5 average annual outdoor levels were also found to be at 10.46μg/m³ - over 109% higher than the WHO recommended level of 5μg/m³.
VOCs annual average: Europe claims top rankings
In contrast to PM2.5, it is European countries that experienced the highest annual average VOC levels according to Dyson Purifiers. Austria tops the list, followed by Romania, Germany, Switzerland, and Poland.
Southeast Asian countries emerged from 19th position, with Singapore faring worse than neighbouring country, Malaysia, with VOC Annual Average levels of 190.37 parts per billion (ppb) as compared to 171.42 ppb in Malaysia.
Low uptake of Auto mode globally and in Singapore
Globally, just 8% of Dyson Purifiers spend more than three-quarters of the time in Auto mode – where the machine constantly monitors the air quality and automatically responds to changing pollution levels – suggesting that Dyson machines in homes across the world are not being used to automatically manage the pollution events in homes these connected air quality data insights show. The US leads the way on proportion of purifiers in Auto mode (14%), with Chicago topping the list of cities, followed by New York, Toronto and Los Angeles.
Some of the cities with the lowest proportion of machines in Auto mode correlate to those who rank highly in pollution levels on a daily, monthly and average basis – in particular PM2.5 – including Shenzhen (2.2%), Mexico City (2.4%) and Shanghai (3%) which note the three lowest percentages of purifiers in Auto mode.
Just over 3% of Dyson purifier users in Singapore use their machines in Auto mode despite high levels of indoor air pollution and seasonal haze.