Lexi Webster
Australia has been ranked as the 10th cleanest country out of 98 in the world for air quality, with a countrywide average PM2.5 level of 8.0 μg/m3. Within Australia, Tasmania has been ranked as the state with the cleanest air, with 23 out of 24 of Australia's least polluted cities for PM2.5 pollution in 2019 located there. More specifically, the cleanest location in Tasmania is the coastal town of St Helens, with an annual average PM2.5 concentration of 2.4 μg/m3. However, it is important to note that Australia does face air pollution problems, particularly in its bigger cities, due to population growth, increased traffic, industrial activity, and the country's reliance on coal.
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What You'll Learn
Hobart, Tasmania, has the cleanest air in Australia
Australia is known for having some of the cleanest air in the world. A global analysis found that many Australian cities have the cleanest and freshest air globally. According to a report by HouseFresh, six out of the nine cities experiencing 365 'good air days' a year were in Australia. Perth, Wollongong, Sydney, Newcastle, Adelaide, and Canberra are among the top Australian cities with crisp, fresh air.
However, Hobart, Tasmania, has been ranked as the Australian city with the cleanest air in a new study of almost 400 cities worldwide. Two other Tasmanian locations, St Helens and Emu River, were also found to have exceptionally clean air. Tasmania's air quality can be attributed to its coastal locations and secluded areas, which help keep the air fresh and clean.
Tasmania has been a leader in clean air initiatives. The Cape Grim Baseline Air Pollution Station, located on the Cape Grim Peninsula in North-Western Tasmania, has been measuring air quality since 1976 to determine a baseline for the pollution of the Earth's atmosphere. The station's secluded location, with the nearest village about an hour away, ensures that its data is not affected by external factors.
While Australia has relatively clean air compared to other countries, it is not without its air pollution problems. Climate change, bushfires, population growth, and industrial activity have all impacted the country's air quality. Despite these challenges, Tasmania and its capital city, Hobart, continue to maintain some of the cleanest air in Australia and the world.
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Perth is the second-cleanest city in the world
Australia has been ranked as the least polluted country in the world, with 3 cities in the top 5. A report by HouseFresh found that six out of the nine cities experiencing 365 'good air days' a year were in Australia, with Perth claiming the second-top spot worldwide. Wollongong, Sydney, Newcastle, Adelaide, and Canberra also made it to the top ten.
Perth, a beautiful city in Western Australia, is thus the second-cleanest city in the world. The city has a population of over 2 million people and is known for its stunning beaches and picturesque parks and gardens. The Western Australian government has implemented various initiatives to improve air quality and reduce pollution, which have contributed to Perth's impressive ranking.
Perth's clean air can be attributed to several factors. The city benefits from a generally low population density, which reduces the concentration of pollutants in the air. Additionally, Perth experiences a Mediterranean climate, with mild, wet winters and warm to hot, dry summers. This climate promotes the dispersion of pollutants and the growth of vegetation, which helps to purify the air.
The Western Australian government has also played a significant role in maintaining and improving the air quality in Perth. In 2015, Australia established the National Clean Air Agreement (NCAA), which sets out a framework for prioritising air quality issues and effective policy. Western Australia has also invested in renewable energy sources, such as wind and solar power, which contribute to reducing air pollution.
Furthermore, Perth has a relatively low number of industrial activities that produce large amounts of air pollution. The city has a diverse economy, with a focus on industries such as mining, oil and gas, education, agriculture, and tourism. The Western Australian government has also implemented regulations and standards for industries to ensure that air quality is maintained, with particular efforts targeted at managing PM2.5 levels.
Perth's ranking as the second-cleanest city in the world is a testament to the effectiveness of these initiatives and the commitment of the Western Australian government to prioritizing air quality. The city's clean air contributes to the overall livability and attractiveness of Perth as a place to live, work, and visit.
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Sydney has the worst air pollution in Australia
Australia has been ranked as the 10th cleanest country out of 98 countries in IQAir's 2019 World Air Quality Report. However, Sydney, the capital of New South Wales, has been singled out for its poor air quality. Sydney's air quality issues are mainly attributed to wildfires, hazard reduction burning, and dust storms. The city's annual average PM2.5 concentration has been measured at 10.1 μg/m3, exceeding both Australian and World Health Organisation (WHO) target limits.
Sydney's air pollution is primarily caused by particulate matter and ozone, which often exceed national standards. The city's 2019 annual average represented an increase from the previous two years, possibly due to an increase in wildfires during the winter of 2019-2020. The "Black Summer" of 2019-2020, a period of severe wildfires, significantly impacted Sydney and the surrounding region, with New South Wales being the worst-affected state in terms of air quality.
Wildfires are a natural and annual occurrence in Australia, but the 2019 fires were particularly devastating. During this period, Sydney's air quality suffered due to the combination of natural and human-made factors. Additionally, Sydney's vehicle emission standards are less stringent than those in other developed nations, contributing to higher levels of harmful emissions from transport. Motor vehicle exhausts, particularly nitrogen dioxide and PM2.5, are major year-round sources of air pollution in the city, along with power stations as a source of PM2.5.
The health impacts of air pollution in Sydney are significant. Studies estimate that residents' exposure to air pollutants contributes to 1.6-2.9% of total annual fatalities. The World Health Organization emphasizes that any exposure to PM2.5 can have negative health consequences. As a result, the Australian government is prioritizing efforts to manage PM2.5 levels in the future.
While Sydney struggles with air pollution, other Australian states and cities fare better. Tasmania, for instance, is known for its clean air, with 23 out of 24 of Australia's least polluted cities for PM2.5 pollution in 2019 located within the state. The coastal town of St Helens in Tasmania boasts an impressive annual average PM2.5 concentration of 2.4 μg/m3. Additionally, Australian cities like Perth, Wollongong, Adelaide, and Canberra have been recognized for their high number of "good air days," indicating low levels of particulate matter in the atmosphere.
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Bushfires and dust storms affect air quality
Australia has been ranked as the country with the cleanest air in the world, with a countrywide average PM2.5 level of 8.0 μg/m3. Tasmania, in particular, is known for its clean air, with 23 out of 24 of Australia's least polluted cities for PM2.5 pollution in 2019 located in the state. The Cape Grim Baseline Air Pollution Station in North-Western Tasmania has been measuring air quality since 1976 and has found that the air there is the cleanest on the planet.
However, bushfires and dust storms can significantly impact air quality in Australia. Dust storms are characterized by strong winds carrying large amounts of dust particles, reducing visibility and potentially degrading air quality by releasing particulate matter into the atmosphere. Factors such as drought, desertification, and human activities like agriculture or construction can increase the occurrence of dust storms. Dust storms can also carry pollutants, allergens, and other harmful substances, which can have adverse health effects, especially for individuals with respiratory conditions.
Bushfires also contribute to elevated particle levels in the air, particularly smoke from vegetation burning, which can cause respiratory damage and worsen respiratory and cardiovascular diseases. Uncontrolled burning during extreme weather conditions can burn more intensely and impact air quality, especially in combination with drought and wind.
To address air quality issues, Australia's state governments and Environment Protection Agencies (EPAs) work to achieve national standards. In 2015, Australia established the National Clean Air Agreement (NCAA), which sets a framework for prioritizing air quality issues and effective policies, including emission reduction measures and education initiatives.
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Tasmania's St Helens is the cleanest location
Australia has been ranked as the 10th cleanest country out of 98 countries in the world. It has the cleanest air in the world, with many of its cities having the cleanest and freshest air. Tasmania, an island state located 240 km south of mainland Australia, has the cleanest air quality in the country.
Tasmania's St Helens, a small coastal fishing town, is the cleanest location in the state. It has an annual average PM2.5 concentration of 2.4 μg/m3, which is lower than the global average. The town's beautiful beaches, lovely waterways, and good access to the mountains make it a desirable place to live and visit.
St Helens' overall air quality index is 1, with a PM2.5 AQI of 9 and a PM10 AQI of 1. The low levels of PM2.5 pollution in the town are significant because PM2.5 particles are the most hazardous to human health in Australia. These microscopic particles can penetrate deep into the human system and enter the bloodstream, causing a range of adverse health effects.
Tasmania's relatively low levels of ambient air pollution compared to global locations are worth noting. However, it is important to remember that air pollution can still have health effects, even at low levels. Additionally, Tasmania is subject to occasional short-term extreme pollution events, such as smoke from bushfires and dust storms, which can impact air quality.
The clean air in Tasmania is a significant drawcard for tourism, with the state's official tourism slogan being "Come down for air." The state's clean air and fresh water are attractive features for those seeking a healthy and pure environment.
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Frequently asked questions
Tasmania has the cleanest air in Australia, with 23 out of 24 of Australia's least polluted cities for PM2.5 pollution in 2019 located in the state. Hobart in Tasmania has been ranked as the Australian city with the cleanest air in a study of almost 400 cities worldwide.
PM2.5 refers to microscopic airborne particles of 2.5 microns in diameter. These particles are hazardous to human health as they can penetrate deep into the human system upon inhalation and enter the bloodstream.
While Tasmania has the cleanest air in Australia, other Australian cities have also been recognised for their good air quality. A report by HouseFresh found that six out of the nine cities experiencing 365 'good air days' a year were in Australia, with Perth claiming second spot worldwide. Wollongong, Sydney, Newcastle, Adelaide, and Canberra were also among the top cities with the freshest air.
Australian cities have relatively clean air due to their proximity to the coast and the lack of mountains, which prevent strong inversion layers that trap emissions close to the ground. Additionally, Australia has taken steps to address air pollution, such as establishing the National Clean Air Agreement in 2015 and prioritising the reduction of pollutant emissions from sources like wood heaters.
While Australia has many cities with good air quality, it is not immune to air pollution problems. Climate change, bushfires, dust storms, population growth, and industrial activity can all impact Australia's air quality. Cities like Sydney and Melbourne, which have higher populations, more traffic, and more industrial activity, tend to have worse air pollution levels.
