Worried you’re breathing unclean air? Here’s how to measure it
In Australia, many apps and websites offer local air quality ratings. An expert explains what to look out for.
Concerned about the air you breathe? Discover how to measure it.
Air quality can vary significantly depending on location, with factors like pollution and natural disasters like bushfires and dust storms impacting cleanliness. To ensure you're getting accurate information, start by visiting your state or territory Environmental Protection Authority website. These sites provide air quality data in various formats, including technical data, color-coded advisory maps, and emergency incident updates.
This data comes from government monitoring networks that follow the Australian National Environment Protection (Ambient Air Quality) Measure, ensuring consistent, accurate, and transparent data collection and interpretation.
Understanding the data can be challenging at first glance. The simplest way to interpret it is by checking the air quality category, which is color-coded based on a traffic light system. Green indicates "good" air quality, while dark red signifies "extremely poor" air quality. The government collects data on pollutant concentrations, which are the amounts of harmful substances found in a volume of air. This data is quality checked and published as hourly updates.
Mobile phone apps can also provide air quality information on the go. Many of these apps source data from government websites or low-cost monitoring networks like IQAir and PurpleAir, using indicative data to highlight general trends rather than exact values. While convenient, it's essential to check where the data comes from and if it has been modified.
Some apps use a traffic light reporting system similar to government categories, while others employ the Air Quality Index, which ranks common pollutants on a scale from 0 to 500. However, this numbers-based approach may hide important details, so it's crucial to be aware of the limitations.
Government monitoring systems rely on reference instruments, which are highly precise devices requiring regular maintenance and checks. In contrast, indicative monitors are smaller, affordable, and powered by batteries or solar, estimating levels of dust, temperature, humidity, and certain gases and volatile organic compounds. While indicative monitors help fill gaps in official monitoring data and are useful in community projects, their data must be interpreted with caution due to potential inaccuracy over time and improper placement.
When assessing the quality and reliability of air quality data from apps and websites, ask four key questions: Who runs it? What data is it showing? What instruments do they use? And what quality control measures are in place? By asking these questions, you can better understand the source of the data and decide whether it's trustworthy. Remember, the challenge isn't finding data but knowing how to assess its quality and interpret it responsibly.
Written by urgent.news from The Conversation AU's reporting — not their text. Machine-written — may contain errors; check the original before relying on it.
