约翰内斯堡的空气质量

约翰内斯堡的空气质量指数(AQI)和PM2.5空气污染

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带有彩色AQI图标的IQAir地图

空气质量提供者和数据来源

数据来自

数据提供者

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数据来源

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South African Air quality Information System的主页标志1 匿名数据提供者的主页标志South African Air quality Information System的主页标志IQAir的主页标志

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天气

约翰内斯堡现在的天气怎么样?

天气图标
天气晴朗
温度60.8°C
湿度48%
风速和风向3.4 mp/h
气压1031 mb

实时AQI城市排名

实时南非 热门城市排名

小提示图标
#city美国 AQI
1 范德拜爾帕克, 豪登省

161

2 弗里尼欣, 豪登省

153

3 Sebokeng, 豪登省

128

4 约翰内斯堡, 豪登省

115

5 Ga-Rankuwa, North West

89

6 Thabazimbi, 林波波省

86

7 Eastleigh, 豪登省

85

8 Soshanguve, 豪登省

72

9 Springs, 豪登省

71

10 Sasolburg, Free State

70

(当地时间)

查看世界AQI排名

实时约翰内斯堡 AQI排名

实时约翰内斯堡空气质量排名

小提示图标
#station美国 AQI
1 Jabavu

151

2 Olifantsfontein

123

3 Bedfordview

115

4 Diepkloof

107

5 Kensington - Magpie Street

57

(当地时间)

查看世界AQI排名

美国 AQI

115

实时空气质量指数(AQI)
对敏感人群不健康

表示AQI等级的人脸

概览

约翰内斯堡现在的空气质量指数(AQI)是多少?

空气污染等级空气质量指数(AQI)主要污染物
对敏感人群不健康 115 美国 AQItrendPM2.5
污染物浓度
PM2.5
41.1 µg/m³trend
pm10
89.1 µg/m³trend
so2
13.4 µg/m³trend

健康建议

约翰内斯堡空气污染,如何做好防护?

IQAir口罩图标 Sensitive groups should wear a mask outdoors
来一个高效又舒适的口罩
IQAir净化器图标 请开启空气净化器
想要一台空气净化器吗?
开窗图标请关窗以防止室外脏空气进入室内
骑车图标Everyone should reduce outdoor exercise

预报

约翰内斯堡空气质量指数(AQI)预报

污染等级天气温度风速和风向
星期五, 4月 9

对敏感人群不健康 112 美国 AQI

表示AQI等级的人脸
星期六, 4月 10

对敏感人群不健康 118 美国 AQI

表示AQI等级的人脸
星期日, 4月 11

对敏感人群不健康 108 美国 AQI

表示AQI等级的人脸
星期一, 4月 12

中等 88 美国 AQI

表示AQI等级的人脸
天气图标82.4°60.8°
风向84度流动

6.7 mp/h

今天

中等 71 美国 AQI

表示AQI等级的人脸
天气图标82.4°60.8°
风向84度流动

0 mp/h

星期三, 4月 14

对敏感人群不健康 103 美国 AQI

表示AQI等级的人脸
天气图标82.4°62.6°
风向208度流动

2.2 mp/h

星期四, 4月 15

中等 76 美国 AQI

表示AQI等级的人脸
天气图标80.6°64.4°
风向305度流动

6.7 mp/h

星期五, 4月 16

对敏感人群不健康 111 美国 AQI

表示AQI等级的人脸
天气图标78.8°53.6°
风向139度流动

4.5 mp/h

星期六, 4月 17

中等 95 美国 AQI

表示AQI等级的人脸
天气图标68°48.2°
风向35度流动

4.5 mp/h

星期日, 4月 18

中等 78 美国 AQI

表示AQI等级的人脸
天气图标71.6°53.6°
风向241度流动

2.2 mp/h

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历史

约翰内斯堡历史空气质量图表

如何更好地远离空气污染侵害?

减少您在约翰内斯堡 空气的污染暴露值

约翰内斯堡 空气质量分析和数据

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.

约翰内斯堡空气质量数据来源

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