NIWA AIR QUALITY STUDY
The findings have just been shared from the air quality study this winter in which South Alive has worked alongside the National Institute of Water and Atmospheric Research Ltd (NIWA) air quality team to look at how much pollution is getting into people’s homes. It follows on from the previous study our volunteers were involved with where NIWA mapped outdoor air quality for Invercargill.
Dr Ian Longley (NIWA) gave a talk this month to share the findings.
We learnt the most polluted areas in Invercargill were not necessarily where the air pollution was created but where the wind transported it. In Invercargill, the air pollution settled in South Invercargill pockets largely due to the wind pattern, which is generally southward in Invercargill.
Air pollution is particularly bad in the winter months when more people are burning wood and coal to keep warm. This worsens the air quality in towns and cities across New Zealand, especially when the wind drops.
The homes of six South Invercargill volunteers to collect data every few minutes on levels of particulate matter in the home. This enabled the air quality scientist to work out whether indoor air was being contaminated from inside of from outside the home, or both. Air filtration units were then trialed in the homes of these volunteers, to scrub the indoor air clean and evidence from the study showed they were able to reduce pollution levels significantly.
This study will help councils and individuals understand air quality and develop good solutions to improve air quality in homes. Stopping or reducing pollution at the source is one step people can take to improve air quality in their home.
“Although we can use filtration to scrub indoor air clean, it is always better to stop or reduce pollution at its source. Switching to electric heating will remove heating emissions entirely, while keeping chimneys clean, using dry or ultra-low emission wood, and using pellet burners are a few other steps that people can take that will help.” NIWA 2023
To read more more the study outcomes here – https://niwa.co.nz/news/some-homes-contain-3-times-more-air-pollution-niwa-finds
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