Air quality in Johannesburg

Air quality index (AQI) and PM2.5 air pollution in Johannesburg

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Weather

What is the current weather in Johannesburg?

Weather icon
WeatherClear sky
Temperature50°C
Humidity74%
Wind5 mp/h
Pressure1019 mb
Air pollution has cost an estimated3,900 deaths*in Johannesburg in 2021LEARN MORE*Air pollution also cost approximately $1,600,000,000 USD in Johannesburg in 2021.

live aqi city ranking

Real-time South Africa city ranking

Tooltip icon
#cityUS AQI
1 Johannesburg, Gauteng

81

2 Rustenburg, North West

75

3 Bojanala Platinum, North West

70

4 Temba, Gauteng

68

5 Eastleigh, Gauteng

67

6 Springs, Gauteng

66

7 Vereeniging, Gauteng

65

8 Pretoria, Gauteng

64

9 Centurion, Gauteng

63

10 Roodepoort, Gauteng

63

(local time)

SEE WORLD AQI RANKING

live Johannesburg aqi ranking

Real-time Johannesburg air quality ranking

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#stationUS AQI
1 Jabavu

127

2 Diepkloof

86

3 Bedfordview

76

4 Olifantsfontein

72

5 Kensington - Magpie Street

45

(local time)

SEE WORLD AQI RANKING

US AQI

81

live AQI index
Moderate

Human face indicating AQI level

Overview

What is the current air quality in Johannesburg?

Air pollution levelAir quality indexMain pollutant
Moderate 81 US AQItrendPM2.5
PollutantsConcentration
PM2.5
26.6 µg/m³trend
PM10
83.1 µg/m³trend
NO2
41.6 µg/m³trend
SO2
59.8 µg/m³trend
!

PM2.5

x2

PM2.5 concentration in Johannesburg air is currently 2 times above the WHO annual air quality guideline value

Health Recommendations

How to protect from air pollution in Johannesburg?

An open window iconClose your windows to avoid dirty outdoor air
A man cycling iconSensitive groups should reduce outdoor exercise

Forecast

Johannesburg air quality index (AQI) forecast

DayPollution levelWeatherTemperatureWind
Tuesday, Sep 14

Moderate 79 US AQI

Human face indicating AQI level
Wednesday, Sep 15

Moderate 97 US AQI

Human face indicating AQI level
Thursday, Sep 16

Unhealthy for Sensitive Groups 107 US AQI

Human face indicating AQI level
Friday, Sep 17

Moderate 78 US AQI

Human face indicating AQI level
Weather icon69.8°48.2°
Wind rotating 77 degree

13.4 mp/h

Today

Moderate 81 US AQI

Human face indicating AQI level
Weather icon68°50°
Wind rotating 7 degree

11.2 mp/h

Sunday, Sep 19

Moderate 76 US AQI

Human face indicating AQI level
Weather icon73.4°50°
Wind rotating 353 degree

11.2 mp/h

Monday, Sep 20

Unhealthy for Sensitive Groups 105 US AQI

Human face indicating AQI level
Weather icon77°59°
Wind rotating 315 degree

13.4 mp/h

Tuesday, Sep 21

Unhealthy for Sensitive Groups 149 US AQI

Human face indicating AQI level
Weather icon78.8°59°
Wind rotating 19 degree

13.4 mp/h

Wednesday, Sep 22

Unhealthy 158 US AQI

Human face indicating AQI level
Weather icon71.6°53.6°
Wind rotating 350 degree

11.2 mp/h

Thursday, Sep 23

Moderate 90 US AQI

Human face indicating AQI level
Weather icon77°55.4°
Wind rotating 357 degree

8.9 mp/h

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Historical

Historic air quality graph for Johannesburg

How to best protect from air pollution?

Reduce your air pollution exposure in Johannesburg

AIR QUALITY ANALYSIS AND STATISTICS FOR Johannesburg

How clean is the air in Johannesburg, South Africa?

Johannesburg, informally known as Joburg, or "The City of Gold", is the largest city in South Africa, and is classified as a megacity. It is one of the 50 largest urban areas in the world. The city is located in the mineral-rich Witwatersrand range of hills and is the centre of the large-scale gold and diamond trade. In 2019 the estimated population was just over 5 million people for the city and twice that for the metro area.

In the second quarter of 2021, Johannesburg was experiencing a period of “Moderate” quality air with a US AQI reading of 87. This is in accordance with recommendations from the World Health Organisation (WHO). The recorded levels of pollutants were as follows: PM2.5 - 29.4 µg/m³, PM10 - 47 µg/m³, nitrogen dioxide (NO2) - 30.9 µg/m³ and sulphur dioxide (SO2) - 7.5 µg/m³. With concentrations at these levels, you are advised to close doors and windows to prevent more polluted air from entering the house. And those of a sensitive disposition should avoid all types of outdoor activity until the air quality improves considerably.

Is the quality of air consistent throughout the year?

Looking back at historic figures from previous years, it can be seen that the air quality in Johannesburg is of “Moderate” quality for about 10 months of the year. This means that the recorded figures are between 12.1 and 35.4 µg/m³. In 2020, only June and July recorded worse figures of between 35.5 and 55.4 µg/m³ which classified it as being “Unhealthy for sensitive groups”.

Figures were recorded from 2019 with an average annual result of 25.3 µg/m³ and showed a slight improvement in 2020 with a mean figure of 22.3 µg/m³.

The air quality not only differs from month to month, but it can change daily, depending on the weather conditions and other factors. By glancing at the table published on the IQAir website (at the top of this page), the quality can be seen to change from day to day.

What can be done to improve the air quality in Johannesburg?

As far back as 2015, the technology company, IBM proposed forming a partnership with the Council for Scientific and Industrial Research (CISR) and the City of Johannesburg (COJ) to help tackle the problem of air pollution. Advanced technology such as the IoT (Internet Of Things) could be used to predict the repercussions of certain measures. Information from several sources including the City of Johannesburg, the City of Tshwane and the Vaal Industrial Triangle will be analysed and computer-generated forecasts made as to what would happen under certain circumstances.

IBM's advanced decision analytics together with IoT technologies, combined with cognitive computing to both ingest and learn from the huge amounts of “big data”, will help to create precise air pollution forecasting systems for the city. One major problem to overcome is the variety of sources of pollutant emissions, like those from vehicles, domestic fuel burning, veld fires, volatile organic compounds from trees and others that can lead to high levels of air pollution.

What causes the air to be polluted?

Air pollution has various sources, but most of the pollutants come from incomplete combustion processes in road traffic, industrial plants and power stations, and from private households. Particulate matter, which is defined as particles with a diameter of less than 2.5 micrometres (PM2.5), is considered to be the greatest problem to health because of its microscopic size.

At the same time, methane and ozone also have an impact on climate change. Reducing them is therefore beneficial not only for people’s health but also for climate change mitigation.

It is reported that one of the main problems facing Johannesburg is the fact that it used to be a mining town as is still surrounded by the dumping grounds the mines created. The other problem it caused was that many more people than were intended came to settle in the area which resulted in a huge increase in traffic volume and the problems associated with that.

How poor is the air quality in Johannesburg?

For the four million people in Johannesburg, their air means people die three years earlier than they would if they were living in Cape Town and breathing their cleaner air. For at least 50 per cent of the time, the air in Johannesburg is unsafe. This is due to a mixture of dust blown into the city, exhaust fumes from the nearly five million vehicles in Gauteng, fires in homes, and pollution from small industries and power stations.

Using pollution measurements from satellites, researchers have concluded that the air in Johannesburg is the worst in the country and costs people 3.23 years of their life. The second-worst place was Sedibeng district municipality, which is slightly south of Johannesburg, which includes an area where heavily polluting industries such as Sasol and ArcelorMittal are located. People in the Tshwane metro municipality which is north of Johannesburg, lose 2.82 years of their life through living in the city.

By contrast, the air in Cape Town is thought to be 90 per cent better than Johannesburg and does not detract from the average lifespan.

What impact does Johannesburg’s poor quality air have on our health?

In several of South Africa’s major cities, the air is often so polluted that it is killing them. Everybody is affected by this as we all have to breathe. It is estimated that the poor air quality in Johannesburg is robbing the lives of 54 people every day!

The data on what exactly is in the air has long been a secret between the regulators and those responsible for the emissions. However, this is not now the case. There is an established website (saaqis.environment.gov.za) where all information is now readily available for all to see. There is also an app that can be downloaded to a suitable smartphone for information “on-the-go”.

Children are particularly susceptible as they breathe faster than adults and are often more active. After a period of heavy exertion, the particles lodge deeply in the lungs. Any pollutants which are carried by the particles soon break away and start to poison the new host.

Johannesburg air quality data sources

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Data validated and calibrated by IQAir

Where is the cleanest air quality in Johannesburg?

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