The Cape Grim Baseline Air Pollution Station was established in 1976 to monitor and study global atmospheric composition.You can read about it here.

The Station's scientific research is jointly managed by the Bureau of Meteorology and Commonwealth Scientific and Industrial Research Organisation (CSIRO) - Marine and Atmospheric Research. Other Australian and international research institutions contribute.

The Bureau funds and manages the station and liaises with the World Meteorological Organization and the United Nations Environment Programme.

Station management, lead scientists and other specialists give advice on the overall program. Lead scientists manage individual scientific programs.

One of the core scientific programs conducted at Cape Grim is PARTICULATES, i.e., Pm10 and PM2.5.
Particulates get a mention here http://www.bom.gov.au/inside/cgbaps/programs.shtml

If, “Pollution threatens environmental sustainability and can have harmful effects on human health.” then why has the PM2.5 baseline air monitor at Cape Grim been out of action since it stopped operating in December 2008 for some years?
"PM2.5 samples collected with LV that stopped operating in Decenber 2008, ...due to some sampling issues we had."
Scientists from around the world supposedly rely on data gathered at Cape Grim monitoring station. We are told governments make decisions based on data from Cape Grim. How can they, and what are these people being told?

We should not be claiming Tasmania’s N/W tip has the cleanest air in the world when PM2.5 data has not been gathered from the Cape Grim monitoring station since 2008.
Smoke comes into Tasmania from the mainland.
Here in the right hand picture it can be seen entering the measuring segment of the Cape Grim base-line air monitoring station. It fails to be recorded when the PM2.5 measuring equipment is not working or the segment switch is turned off.

Cape Grim monitoring station can claim "This baseline air is representative of a large area of the Southern Hemisphere, unaffected by regional pollution sources (there are no nearby cities or industry that would contaminate the air quality)."
and therefore  is not representative of Tasmania's air quality.
Image from EPA Technical
Report #9
, page 59.
Courtesy Google maps
Smoke consists primarily of fine particle pollution (PM2.5).
It is widely reported that this size particle can travel deep into the lungs and stay there. These particulates can have aerosols or other gaseous toxins attached to them and they can cross over into the blood stream.

It is interesting to note the PM2.5 air monitoring at Cape Grim went out of action at much the same time in 2008 as Tasmanians were subjected to horrendous quantities of pernicious forestry smoke. The smoke has persisted ever since and the Cape Grim PM2.5 air monitor has not been reporting. (see 18/5/2012 comment below).
Cape Grim stopped monitoring PM2.5's in 2008. Graph provided by the CSIRO
You do not need to go to Linfen, China; Tasmania can be one of the filthiest paces on earth when forestry are burning their waste, when people are back-yard burning or have their wood heaters going, or there is pollution coming in from the mainland.
FORESTRY HALTS BURN-OFFSo edit
The MERCURY 19/4/2010le click to edit
Smoke obscures the setting sun last night. Picture: LEIGH WINBURN
Go here  and here to read more.
Cleanest place in the world?  We do not think so.
Senate Question # 1854
Senator Milne asked the Minister in writing on 18/5/2012.
2. When will the PM2.5 Cape Grim Baseline Air Pollution Station be reinstated and resume monitoring?
Senator Conroy: The Minister for Sustainability, Environment, Water, Population and Communities provided the following answer;
2. Cape Grim is currently monitoring PM2.5 and will continue to do so as part of the aerosol program.
Cape Grim measuring sector.
Click to enlarge.
The PM sensor switch turns off when wind blows from outside the 190-280 degrees baseline sector.
Cape Grim Base-line Air Monitoring Station
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The ambient air monitoring station  provided by  EPA Air Tasmania at Smithton (ST) is about 8Km down wind from Cape Grim Base-line air monitoring station and records PM that is certainly not the cleanest air in the world.
People in Tasmania certainly are not breathing the cleanest air in the world with the dirty burning that goes on in our beautiful state, and the further you travel from Cape Grim the worse it gets.
For example check out the photos here.
"Despite what we might think about Tasmania, our air quality is not always the best.  In fact, during winter parts of Tasmania have some of the dirtiest air in Australia." - Aurora Energy.
Go HERE:  Aurora was formed by the disaggregation of the Tasmanian Hydro Electric Commission (HEC) on 1 July 1998. Formed under the Electricity Companies Act 1997, Aurora is subject to the Corporations Act 2001. The company is wholly owned by the Government of Tasmania, with its two shareholders being the Minister for Energy and Resources, and the Treasurer.
 
Mr. Mike Dean, Tasmanian developer, took out a full page advertisement in the Sunday Examiner, February 23, 2014 which included the above photo.
He claimed, "...visitors...can enjoy what we do too, like;
The world's purest air. The purest water. The safest environment."
We need to remember this development was to be at Grindelwald, near Launceston in the Tamar valley that is prone to temperature inversions. It is nowhere near Cape Grim base-line air monitoring station, is downwind from Cape Grim and has picked up pollution.

A letter was written to the newspaper Editor as follows on the 25th February:
We in Tasmania do not enjoy the world’s purest air or water. Aurora Energy is on record as saying, “Despite what we might think about Tasmania, our air quality is not always the best. In fact during winter parts of Tasmania have some of the dirtiest air in Australia.”
And during autumn when forestry is burning our air quality can degrade severely.
In summer we get smoke from fires in Tasmania and the mainland.
Cape Grim claims to have the cleanest air in the world because the air being monitored only comes from the Great Southern Ocean. The monitoring switch is turned off if air enters from outside that measuring quadrant (http://cleanairtas.com/air-monitoring/cape-grim.html). Most people don’t live at Cape Grim or on the ocean.
Their clean air is soon fouled as confirmed by an air monitoring station at Smithton a short distance away. We certainly don’t enjoy the world’s purest air.
And for purest water, the Rubicon River had a MCPA reading of 19.1 in January!
The Liberals are blind to the developer’s claims and have promised $3.4million for the Craggy Ridge eco health development but they too want an unhealthy stinking pulp mill just across the river from it. Tell this to the eco investors.
I wish Liberal would make their mind up, health or pulp mill.
Cradle Coast NRM says we have the cleanest air in the world at Cape Grim.
Then they add, "... as this air moves across Tasmania it is impacted by activities that reduce air quality."
Read their fact sheet here
Forestry Tasmania lit these burns in the N/W of Tasmania on the 8th April 2015.
Cape Grim can not be seen in this NASA aqua modis satelite image at 14.25 AEST because of the smoke.
Cleanest air in the world at Cape Grim?
Cape Grim Wind Rose
To enlarge click on the wind rose supplied by the Bureau of Meterology.
Not only does wind come into Cape Grim from the Great Southern Ocean it comes in from other not-so-clean directions as well.
Screen shot of live winds animation.
Thanks to http://earth.nullschool.net/#current/wind/surface/level/orthographic=146.14,-39.70,2151

Here it shows air coming into Cape Grim measuring segment on the N/W tip of Tasmania.
The air does not always come from  the Southern Ocean as claimed but can come from across mainland Australia.
On this occassion the purest air from the Southern Ocean heads south before it reaches Cape Grim.
Check out the above link to see where our air is actually coming from.
Following on, here is another image from about a month later.
The PM segment switch (see above) would have been turned on, as it would have been on the above ocassion, because air was
being measured coming into the Cape Grim measuring sector.
But really where is our weather coming from and what are we measuring at Cape Grim?
The air being measured at Cape Grim base-line monitoring station is not what most Tasmanians are breathing.

According to the CSIRO
“The Cape Grim station is positioned just south of the isolated north-west tip (Woolnorth Point) of Tasmania. It is in an important
site, as the air sampled arrives at Cape Grim after long trajectories over the Southern Ocean, under conditions described as
‘baseline’. This baseline air is representative of a large area of the Southern Hemisphere, unaffected by regional pollution
sources (there are no nearby cities or industry that would contaminate the air quality).”
If you look at the two wind screen-shots above, it can be seen the air is not always coming unpolluted from the direction of the Great
Southern Ocean into Tasmania as claimed but can come to Cape Grim and other parts of Tasmania after travelling across
mainland Australia land mass picking up whatever pollutants along the way.
Particulate matter in the form of dust and smoke particulates have been documented coming into Tasmania from the mainland.

It seems time for a rethink on this ‘Cape Grim cleanest, purest, air in the world’ thing.
Do we go by an artist's snapshot when she visited Tasmania or do we go by what people have to say that actually live here?
Do we go by the other snapshots, in the form of 'controlled' air samples gathered under base-lineconditions and stored in canisters
at Cape Grim station, or do we go by the air that all living things are required to breathe day in and day out in Tasmania, including
those at Cape Grim?

To repeat, the air at Cape Grim monitoring station is not what most Tasmanians are breathing. It is not representative of our
ambient air quality across Tasmania. It has been gathered under base-line conditions...sometimes.
We do not live at the air intake at Cape Grim monitoring station where these cleanest air samples in the world are selectively
gathered, and we do not live on the Southern Ocean.
It is claimed by some that Cape Grim (monitoring station) has the world’s purest air, but this is not the case all of the time and Cape
Grim (monitoring station) is not Tasmania.

Take for example Cape Grim Beef.
Cape Grim in the far northwest corner, shaped by wild Southern Ocean swells, abundant rainfall, has the
cleanest air in the world.

However, this link is purely to a photographer’s personal work in the name of Angela Palmer, the same person mentioned in the
Guardian Unlimited article at the top of the page. (Angela Palmer observed that local people do not appear to appreciate living in
the cleanest place in the world. Perhaps it is because it could be the cleanest part of the world, but is not because of all the
deliberate unnecessary burning that goes on in this state. on the islands and on the mainland. And people are being told to lock
themselves in their houses by our Health Department). Angela makes a very valid point about children breathing pollution day in a
day out; something which cleanairtas has consistently said about Tasmania's ambient air quality.

On the About page“Cape Grim is on the north-western most tip of the Tasmanian mainland and hosts the world's most pure air.
Tasmania is renowned for its pristine wilderness but you might not know it’s home to the purest air on earth.
[Cape Grim monitoring station has been cited as having the worlds purest air; not Tasmania.]
In the North-Western corner of Tasmania 40° 41' South, those world-famous Roaring Forties whip away any trace of pollution as
they blow across the Southern Ocean. Combined with low levels of development and its sheer distance from other land
landmasses, Cape Grim’s air quality is pretty unique ..."

Then on the Our difference page  it mentions The Purest Air in the World.

On the Our Farmers page  we are told, You can drive all around Tasmania and see Cape Grim signs on farm gates”
This is the point. There are claimed to be 800 Cape Grim Beef farmers scattered around mainland Tasmania and
on the islands. Actually scattered around Tasmania and the islands, not actually grazing where base-line air is
actually measured at Cape Grim base-line air monitoring station.
At other places on this website you can see a lot of these cattle would not be living and breathing the cleanest,
purest, air in the world.
They would be breathing, eating and drinking life's essentials  that are contaminated by mostly deliberate unnecessary wood
burning, the same as we are.

59 cattle die being transported to abattoir on the mainland.
ABOUT AUSTRALIA - website Facts about Tasmania

“Encircled by the Southern Ocean, Tasman Sea and Bass Strait, we breathe the world’s cleanest air….”
After looking at information and photos on this site at http://www.cleanairtas.com  you would have to agree we do not breathe the world's cleanest air in Tasmania. We breathe some of the dirtiest air at times.
11th August 2015 - This statement was changed to read, "Encircled by the Southern Ocean, Tasman Sea and Bass Strait, Tasmanians breathe clean air..."
CAPE GRIM natural water

"Cape Grim is located North of Antarctica and receives air that has travelled 16,000 kilometres across nothing but the freezing Antarctic Ocean./..."

Whilst it is true some air entering Cape Grim,"... has travelled 16000 Km across nothing but the freezing Antartic Ocean" there are many times the air coming into Cape Grim does not meet this basic baseline condition.
It can have travelled across land from mainland Australia just a short distance away, or from across Tasmania itself. See the wind rose above.
Remember, the Cape Grim measuring switch is turned off if air arrives outside the 190 to 280 degrees segment because it does not meet base-line conditions. By observation this happens VERY often!
Watch the short videos below from nullschool.net:
To recap:
At Cape Grim Baseline Air Monitoring Station, according to the CSIRO, baseline  time (BL) is the time the air samplers are actually running.
The samplers are connected to a baseline switch and samples are taken only during baseline conditions.
The main condition for baseline is that the wind direction is between 190 and 280 degrees.
Air can enter the measuring segment but on a great many occassions it has not come come from Antarctica or great distances across the Southern Ocean.
No sampling is done during non-baseline conditions so the mass on the filters is made up purely from marine sources.

This is the only time when Cape Grim monitoring station could be monitoring the cleanest air in the world, and even this ‘purest’ air soon gets polluted after it is monitored.
http://tasmaniantimes.com/index.php?/weblog/article/southern-hemisphere-joins-north-in-breaching-carbon-dioxide-milestone/
The other 270 degrees of air coming into Cape Grim monitoring station is not classed as baseline and does not lend itself to be so loosely referred to as the cleanest/purest air in the world.
We cannot just latch onto 90 degrees of baseline air measured sometimes under baseline conditions at Cape Grim to say we breathe the cleanest/purest air in the world. These statements are simply not correct.
Baseline air quality from the Southern Ocean is not representative of Tasmanian air quality.
Would people need to demonstrate by letting off smoke flares if we breathe the cleanest or purest air in the world?
Go HERE to read the story.
Clean-Air Credentials: “The air in Tasmania is as clean as it is in Antarctica,” says Paul Fraser, an expert in ozone and climate change from Australia’s Commonwealth Scientific and Industrial Research Organisation. “If you go further south in the Southern Hemisphere, the background concentrations of pollutants don’t change much.”
The baseline air measured at Cape Grim Baseline air monitoring station might be as clean as it is in Antarctica, but it should not be claimed the air in Tasmania is as clean as it is in Antarctica.

Most Tasmanians do not breathe baseline air, we do not breathe the world’s purest air; at times we mostly breathe air that has been polluted by woodsmoke.
Here it is again and it is stunning!
No, Tasmania's air is not stunning and this has been determined by those who are forced to breathe it.
What is stunning are the claims being made below by Tourism Tasmania.
In fact Cape Grim does not have a lighthouse (
there are no lighthouses anywhere near Cape Grim according to the Admiralty list of Lights and Foghorns Vol K which covers Oceania).
The glossy photograph Tourism Tasmania has used is of Maatsuyker Island lighthouse which is nowhere near Cape Grim!
This is a government department promoting Tasmania in a manner that is obviously wrong.
Do we in Tasmania breathe the cleaneast air in the world?  Hardly.
18.5.2016 - Cape Grim in Tasmania last week confirmed that carbon dioxide levels in the Southern Hemisphere reached a dangerous 400 parts per million, as carbon pollution continues to rise more rapidly than ever.
3.2. 2017 - Kenya ranked country with cleanest air in the world
Diaspora Messenger
Kenya has been ranked the country with the cleanest air in the World, topping a list that considered air pollution, energy consumption and renewable energy production.
Data used to rank the countries was obtained from the International Energy Agency and the World Health Organization. It was used by renewable energy firm The Eco Experts to rank the most toxic countries in the world.
Map by Eco Experts
Click on map to enlage South East Asia and Australia