Our Burning Planet


What it’s like to live in the most polluted place on earth, the Vaal Triangle

What it’s like to live in the most polluted place on earth, the Vaal Triangle
A street vendor sells fruit near the Sasol plant in Sasolburg, part of the region known as the Vaal Triangle, in South Africa, on Jan. 18.

Just 30 miles from Johannesburg, in a South African region known as the Vaal Triangle, 1.7 million people are living in a crossfire of some of the most dangerous pollution on Earth.

From the highway into Vanderbijlpark, you can see the heavy veil of smoke that cloaks Africa’s biggest steel mill. To the southeast, near the town of Vereeniging, the Lethabo coal power plant, whose name means “happiness,” joylessly belches out ash and toxic sulfur dioxide. 

Further south, outside a petrochemicals plant in Sasolburg, an adjacent neighborhood regularly reeks of rotten eggs from hydrogen sulfide in the air.

The plants offer steady work for residents at a time when one in three South Africans are unemployed, yet they’re also pumping out harmful emissions at levels so high that Vereeniging is by some measures the most polluted city in the world. 

The toxins are causing hundreds of premature deaths every year across the Vaal Triangle, and respiratory disease for many of those still breathing. The situation is a stark reminder of the toll the world’s dependency on steel, oil and coal is having on human health – and the difficulty a green transition faces if it costs the livelihood of the workers who depend on old economy jobs.

Vereeniging is relatively unknown outside of South Africa, but the country owes much of its status as the most industrialized nation on the continent to it. It was the site of the country’s first coal discovery in 1878, which helped magnates Sammy Marks and Hendrik van der Bijl establish one of South Africa’s most concentrated industrial areas. 

At the town’s Vaal Teknorama museum, the last lump of coal extracted from the Cornelia mine sits on a desk. A 1923 painting shows a happy image of the local Vaal River, with leisure boats sailing down a watercourse lined with steel mills and power plants.

Coal “has ensured industrialization and economic growth in the area,” a plaque proclaims.

A settlement skirts the Sasol Sigma Colliery in Sasolburg. Photographer: Guillem Sartorio/Bloomberg

Today, it has a darker claim to fame. Vereeniging regularly registers the highest concentration of microscopic emissions known as PM2.5, according to Bloomberg Green analysis of data from nonprofit OpenAQ, which runs an open-source network of over 4,000 sensors monitoring particulate pollution worldwide. The often-invisible particulates travel deep into the lungs, which can lead to cancers and cardiac problems.

In the Vaal Triangle, many of them are emitted from industrial plants, which means they often include heavy metals and other toxins that are far more harmful than ordinary dust, according to Ranajit Sahu, an air quality consultant who has worked extensively on South African pollution.

The problem has been on the South African government’s radar for decades. In the mid-2000s, it designated the region as the Vaal Triangle Airshed Priority Area, the first zone in which it would make a concerted effort to lower air pollution.

 Since then the air quality has hardly improved as companies have applied for, and received, exemptions to emission limits and dysfunctional municipalities have stopped collecting waste, forcing residents to burn it. Traffic on the highways crisscrossing the region only adds to the pollution.

Power utility Eskom Holdings SOC Ltd. and petrochemicals company Sasol Ltd. have repeatedly said they can’t afford or don’t have the space to install the equipment required by law to reduce sulfur dioxide pollution. ArcelorMittal SA has, in the past, threatened to shut down the formerly state-owned steel mill. They’ve also repeatedly urged the government to consider the impact of tighter and more expensive pollution standards on their operations in a country with one of the world’s highest joblessness rates.

This resistance may soon prove futile. The environment ministry, under new leadership, has signalled that it expects the companies to comply with tougher pollution limits set to come into effect in 2025. ArcelorMittal and the government have also been sued by activists who previously won a ruling that the state was breaching the constitutional right to clean air in nearby Mpumalanga.

Possibly no settlement in the area has had to make a bigger sacrifice for South Africa’s economic gains than the township of Sharpeville, close to Eskom’s Lethabo power plant.

The facility burns low-quality coal, meaning more pollution is produced per unit of energy generated. A 2017 study by  a leading expert on air pollution attributed 204 premature deaths a year to the Lethabo plant. The study, conducted by UK-based consultant Mike Holland, was one of the first to detail the scale of power plant pollution in South Africa. It has since been challenged by Eskom, which nevertheless said its own research has found that it kills about 330 people annually across all of its plants.

A separate study by Sahu, who is based in California, showed that Lethabo exceeded emission limits for particulate matter, sulfur dioxide and nitrogen oxides 620 times between April 2016 and December 2017, more than any of the 14 other coal-fired plants Eskom ran at the time.

Portia Mofokeng at her home in Mooidraai. Toxins from industrial emissions in the Vaal Triangle are causing respiratory diseases and hundreds of premature deaths every year across the region. Photographer: Leon Sadiki/Bloomberg

Portia Mofokeng, 35, is one of the residents that live within breathing distance of Lethabo. She developed asthma in 2013 and blames her condition and regular visits to the hospital on industrial pollution. Mofokeng can see the cooling towers of the plant from her corrugated steel shack in Mooidraai, a field that once belonged to a local farm.

“The doctor told me if I want to get healed, I must move from here, go to maybe where there’s no pollution,” she said, sitting on a cloth-covered chair clutching two inhalers, which cost around a few dollars each. She often has to buy the medication herself out of a $18 monthly welfare check. “I have nowhere to go.”

When she applied for work as a safety warden at Lethabo she was told her condition precluded her from getting the job. The industries that make her ill are seen by her community as the only sure source of jobs in the region.

That, she says, means there’s little community opposition to the pollution because “their brothers, their cousins work there. So what’s going to happen?” she said.

A housing development next to the Sasol’s petrochemicals plant in Sasolburg. In 2005, the South African government’s designated the region as the Vaal Triangle Airshed Priority Area, the first zone in which it would make a concerted effort to lower air pollution. Photographer: Guillem Sartorio/Bloomberg

A stack releases emissions from the petrochemical plant. Photographer: Guillem Sartorio/Bloomberg

Nearby in Zamdela, the impoverished township that abuts Sasol’s Sigma colliery and its Sasolburg petrochemicals plant, your hand comes away black with coal dust if you run it down the staircase railings of a largely abandoned block of apartments. The company says it monitors dust at its “fence line.”

In a small brick house, Kido Mafisi, who’s lived in Zamdela since the late 1970s, displays her medication and said she often awakens to find black and gray dust on her window ledges.

“I can’t breathe,” she said. “I have asthma, bronchitis and skin rashes.”

A window covered in coal dust at a hostel in Sasolburg. Photographer: Guillem Sartorio/Bloomberg

South Africa’s environment department argues that progress has been made on air quality in the Vaal Triangle, noting big emitters such as Sasol, ArcelorMittal and Eskom have taken some steps to curb their emissions.

ArcelorMittal said it has slashed particulate emissions by 87% since 2007 by suppressing dust and replacing old coal-burning equipment, while reducing other pollutants. Sasol said it has cut particulate emissions by 75% since 2000 largely by installing electrostatic precipitators — devices that attract dust to electrically charged plates. 

Particulate emissions from all of Eskom’s plants, by contrast, are at a 31-year-high. The pollution is exacerbated by the fact that sulfur dioxide, emitted as a gas, often oxidizes with water vapor to form sulfuric acid particles.

Sasol said it runs an offsets program that mitigates against its emissions of particulate matter by removing communal waste that would have otherwise been burnt. Eskom is considering a similar program.

A resident of Zamdela cares for his horses amid the challenges of living in a shack, the failure of the municipality to collect refuse and pollution from Sasol. Photographer: Leon Sadiki/Bloomberg

ArcelorMittal’s Vanderbijlpark plant, Africa’s biggest steel mill. Photographer: Guillem Sartorio/Bloomberg

Still, there’s little evidence of waste collection. Across the road from Sasol’s plant pigs and goats pick through rubbish dumped on the open ground adjacent to rows of small government-built brick houses and tin shacks. Bernard Mafata, a waste collector who drags a trolley between the informal dumps and recycling centers, says residents regularly burn refuse as it’s no longer cleared by the municipality.

Sasol said its offsets projects equate to preventing the emission of 40 metric tons of particulate emissions annually, or 0.5% of its annual production of the pollutants from all of its plants. It stressed that the program is not designed to result in “like-for-like” mitigation.

In an area of the world as polluted as the Vaal Triangle, it can be difficult to see any positive changes on the horizon. But there are some faint signals.

Beyond the government’s new emissions limits next year, there’s growing international pressure for companies across South Africa to clean up their operations. Some of the world’s richest nations are funding a $9.3 billion plan to help South Africa transition away from coal. The Lethabo plant, which is due to start closing down in 2036, may follow the path of older Eskom facilities that are slated for conversion to renewable energy and other activities through the incentive program.

Sasol is also operating a pilot green hydrogen facility in Sasolburg, a fact that it advertises on a billboard in the city.

Children play outside a shack in Mooidraai with the Lethabo power plant in the distance. The industries that make people ill are seen by many in the community as the only source of jobs in the region. Photographer: Leon Sadiki/Bloomberg

Children play outside a shack in Mooidraai with the Lethabo power plant in the distance. The industries that make people ill are seen by many in the community as the only source of jobs in the region. Photographer: Leon Sadiki/Bloomberg

If these developments succeed, they’ll aid the battle against the long-term threat of climate change. Yet they won’t help the people who are inhaling coal’s nasty legacy now.

For residents within the mess left by South Africa’s industrial giants, patience is running thin.

“We’d like to get compensation. They must pay for us,” Mofokeng said. “They are causing the problem.” DM


Absa OBP

Comments - Please in order to comment.

  • Charles Butcher says:

    Oh such a dramatic presentation it really tugs my heartstrings NO IT DOESN’T this is that anc governmunt failure again no managemunt skills, soo as long as the fat cats can live in CLEAN AREAS who the hell cares, they will keep promising and EVENTUALLY when that fails to get the vote the will pull out the old trumpcard APARTHEID is too blame thats why there is NO MONEY. HA,HAHA LMFAO

    • Ismail Lagardien says:

      Charles, I investigated and wrote about this in 1989. From the inversion layer to increased use of coal for space heating (as well as industry) It was so bad then that there were high rates of chest ailments among children (not black)… it was just ugly. And what’s with “manageMUNT” is that, “munt” not the derogatory term for black people used in Zimbabwe by the old Rhodesian Army? Charming fellow, you are.

      • T'Plana Hath says:

        I have repeatedly reported this user for precisely this – by my count this is at least his fifth offense. Any word ending in -ment seems to get the treatment so there’s no way this is a typo or accident. My South African *teachers* would use this word at school back in the ’80s, it’s a South African slur, not necessarily from the Rhodesian Army/Bush War – that would be the word ‘Floppy’.
        Ban this user! He adds no value.

        • Ismail Lagardien says:

          Phew, thanks for that. I know that I am finely tuned, sometimes to finely for racism, antisemitism, sexism etc … so yeah, “glad” someone else noticed this, too.

    • Bob Dubery says:

      Good lord! What an ill-informed and racist comment! Clearly there’s a spectrum of opinion about what is and isn’t civil. The comment doesn’t even have the redeeming grace that it adds to the discussion or leads us to think more deeply.

  • Richard Blake says:

    Fact check. Kolkata, India is the most polluted place on earth.

  • Exist Nomad says:

    on earth? perhaps provide some data to support such bold claims.

  • Paul Du Plessis says:

    Really, to say that the Vaal Triangle is the most polluted area in the world is totally absurd. Metro Jakarta (Jabodetabek) is way more polluted than the Vaal Triangle, with more than 20 million people living in an area of 200 sq km. When it rains, the acid rain falls down on everyone, then the pollution will clear for max 12 hrs, after which its back to thick smog again, which reeks with an unbearable stench of exhaust fumes, factory effluent and fumes, rivers and canals and seriously polluted as well, so before you make wild statements, check pollution stats from other countries as well

    • Ismail Lagardien says:

      Paul you’re so right about Jakarta. I have been back and forth over the past month or so. Again in three weeks’ time. It’s a struggle to get people to be careful when we so love catastrophism. Takes nothing away from the crisis in the Vaal though. When I did research on this in 1989, my newspaper “led” with the statement by the local NP fellow who blamed the removal of influx control for increase in local population, notwithstanding the fact that I looked at white children who had been bearing the brunt of the (chest) problems. At one house, a woman (an Afrikaans woman) scraped a film of black grease from her house’s windows. Her husband explained that their parents had complained years earlier. I did the scientific part, the social impact and the industry and health aspects… somehow the most “important” thing was that the removal of influx control meant more people, more people in informal settlements who used coal for space-heating and cooking. My personal angel was the combination of heavy industry and the inversion layer. Diabolical.

    • Ben Harper says:

      Truth is, South Africa doesn’t even feature in the top 2000 most polluted cities in the world

      • Michele Rivarola says:

        And on this basis someone will donate a house in Secunda for you to move in. Add value not just carbon to your arguments

  • Ben Harper says:

    This article is SO far off the mark! The moat polluted places on earth are:
    1. Dhaka, Bangladesh
    2. Lahore, Pakistan
    3. Patna, India
    4. New Delhi, India
    5. Delhi India
    6. Urumqi, China
    7. Muzaffarnagar, India
    8. Xi’an, China
    9. Xuchang, China
    10. Peshawar, Pakistan
    11. Anyang, China

    8 of the top 25 are in India and 10 of the top 25 are in China

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