加尔各答的空气质量

加尔各答的空气质量指数(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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Central Pollution Control Board的主页标志NASA - National Aeronautics and Space Administration的主页标志West Bengal Pollution Control Board (WBPCB)的主页标志AirNow Department of State的主页标志U.S. Department of State的主页标志4 匿名数据提供者的主页标志

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天气

加尔各答现在的天气怎么样?

天气图标
天气
温度80.6°C
湿度78%
风速和风向4.6 mp/h
气压1010 mb

实时AQI城市排名

实时印度 热门城市排名

小提示图标
#city美国 AQI
1 Bhiwadi, 拉贾斯坦邦

346

2 Alipur, 德里

343

3 Dasna, 北方邦

269

4 Bawana, 德里

214

5 Muzaffarpur, 比哈尔邦

213

6 Loni, 北方邦

210

7 Daurala, 北方邦

198

8 Moradabad, 北方邦

195

9 Bahadurgarh, 哈里亚纳邦

190

10 密拉特, 北方邦

187

(当地时间)

查看世界AQI排名

实时加尔各答 AQI排名

实时加尔各答空气质量排名

小提示图标
#station美国 AQI
1 Rabindra Bharati University, Kolkata - WBPCB

152

2 US Consulate in Kolkata

137

3 NASA-Banamalipur Road

125

4 JODTHBHIM NEWTOWN

118

5 West Bengal Pollution Control Board

118

6 Patuli Main Road

115

7 Trannath Banerjee Road, Kol -114, Sodpur

114

8 Bidhannagar, Kolkata - WBPCB

96

9 Jadavpur, Kolkata - WBPCB

94

10 Rabindra Sarobar, Kolkata - WBPCB

93

(当地时间)

查看世界AQI排名

美国 AQI

117

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

加尔各答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 117 美国 AQItrendPM2.5
污染物浓度
PM2.5
41.9 µg/m³trend

健康建议

加尔各答空气污染,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

加尔各答空气质量指数(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 121 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 138 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 122 美国 AQI

表示AQI等级的人脸
今天

对敏感人群不健康 117 美国 AQI

表示AQI等级的人脸
天气图标104°78.8°
风向230度流动

6.7 mp/h

星期二, 4月 13

对敏感人群不健康 135 美国 AQI

表示AQI等级的人脸
天气图标104°77°
风向208度流动

6.7 mp/h

星期三, 4月 14

对敏感人群不健康 127 美国 AQI

表示AQI等级的人脸
天气图标104°78.8°
风向201度流动

11.2 mp/h

星期四, 4月 15

对敏感人群不健康 122 美国 AQI

表示AQI等级的人脸
天气图标100.4°78.8°
风向195度流动

15.7 mp/h

星期五, 4月 16

对敏感人群不健康 134 美国 AQI

表示AQI等级的人脸
天气图标100.4°78.8°
风向202度流动

8.9 mp/h

星期六, 4月 17

对敏感人群不健康 124 美国 AQI

表示AQI等级的人脸
天气图标98.6°77°
风向189度流动

13.4 mp/h

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历史

加尔各答历史空气质量图表

如何更好地远离空气污染侵害?

减少您在加尔各答 空气的污染暴露值

加尔各答 空气质量分析和数据

How polluted is the city of Kolkata?

Kolkata, sometimes known as the city of joy, is located approximately 80km away from the border to Bangladesh, and is the capital city of the Indian state of Bengal. Famous for its long history of culture, commerce as well as literary and artistic thought, it attracts many visitors, both internationally and locally, as well as having a rapidly growing and somewhat large population of inhabitants, some four and a half million as recorded in 2011, and with 14.85 million as of 2020, showing massive growth not only economically but in regards to the amount of people living within the megacity limits.

Kolkata was shown to have a PM2.5 reading of 59.8 as recorded in 2019, as a yearly average. This puts it directly into the ‘unhealthy’ bracket rating, which requires a PM2.5 reading of anywhere between 55.5 to 150.4 μg/m³ to be classified as such. This reading places it in the position of 61st most polluted city worldwide in 2019, and coming in at 28th place out of all cities ranked in India. This shows that Kolkata is indeed very polluted, and whilst it may not suffer from the same extreme levels of pollution that other cities do, it certainly has many months that see very hazardous levels of pollution.

When is pollution at its worst in Kolkata?

Observing the data recorded over 2019, the one month that stood out above all others was January, which came in with a PM2.5 reading of 176.1 μg/m³, putting it squarely into the ‘very unhealthy’ bracket, one which requires a reading of any PM2.5 number between 150.5 μg/m³ and 250.4 μg/m³ to be given such a title.

PM2.5 (and its larger cousin, PM10) refers to fine particulate matter that is 2.5 or less micrometers in diameter, or 10 if referring to PM10, which is somewhat less deadly due to its larger size but still has the ability to cause many issues when inhaled over long periods of time.

With a rating of 176.1 μg/m³ in January, the whole population would be at a very large risk of adverse health effects, with young children, the elderly and those with predisposition to being sick at highest risk. To give some comparison, the cleanest month recorded in Kolkata was 19.7 μg/m³, nearly 9 times lower than the highest months reading. The disparity is somewhat alarming, with some serious causes being behind this large spike of pollution.

What are the main causes of pollution in Kolkata?

The main causes of pollution in Kolkata would be similar to many other states and cities in India, although with differences in what times of the year see their worst spikes in smoke and haze, due to several different factors. Vehicles always play a large role in the ambient year-round pollution levels, with highly dense and populated cities often playing host to an equal, if not a greater number of vehicles. Cars and motorbikes as well as lorries and trucks would all be emitting vast quantities of smoke, haze and pollution into the air, with ones running off of fossil fuels such as diesel putting out larger amounts of pollution.

Pollutants arising from the vehicular industry would include black carbon and volatile organic compounds (VOC’s), both of which are released from the incomplete combustion of fossil fuels such as diesel.

They are also produced from practices such as slash and burn farming, setting organic waste and refuse on fire, as well as the use of coal to provide power to the numerous factories and industrial plants located around Kolkata. The main pollutant released from the vehicular industry (as well as from all combustion sources) would be nitrogen dioxide (NO2), which is found in high concentration around any area worldwide that sees high volumes of traffic, and indeed Kolkata would be no exception, with levels of nitrogen dioxide constantly being a looming threat in its rise, due to the population explosion and therefore rise in personal vehicles.

What is Kolkata doing about its pollution levels?

Kolkata is implementing a number of incentives over the last few years out of growing concern for its pollution levels. A large amount of resources have been poured into the public transport sector, which would go a long way to helping reduce the levels of ambient pollution, in particular the aforementioned nitrogen dioxide.

Noxious smokes and fumes released from diesel fuels would also be reduced, as with newer public transport infrastructure often means newer models of public buses, as well as trains that rely on alternative fuel sources, and as such they would be emitting far less smoke and haze, usually thick with PM2.5 and other toxic compounds such as carbon monoxide (CO), ozone (O3) and soot, which contains large amounts of the aforementioned black carbon.

Besides being highly dangerous to breathe in, black carbon also has grave consequences in terms of climate control, having a prominent effect on a city due to its ability to convert solar radiation directly into heat. Thus, with large initiatives in the public transport sector, would have marked differences in pollution level reduction, which is already being seen.

Are pollution levels in Kolkata getting better?

Whilst pollution levels in Kolkata still have a way to go in order to see the best health of its citizens, it is apparent that pollution levels have improved over the last few years, with a marked improvement in levels of PM2.5 recorded in 2019 as opposed to the few years prior to that. In 2017, the yearly average of PM2.5 was 76.7 μg/m³, still in the unhealthy rating bracket but considerably higher in number than more recent times.

2018 came in with an even worse reading of 85.4 μg/m³, before finally coming to the improved reading of 2019 at 59.8 μg/m³, representing a drop of 25 μg/m³ of particulate matter in the course of a year.

Whilst Kolkata still has plenty of room for improvement, with the excessive numbers of pollution recorded in January skewing the results massively, its 2019 rating was not too far from being moved down a bracket out of the unhealthy rating and down into the ‘unhealthy for sensitive groups’ bracket. Whilst this is still a very long way from the WHO’s target rating of 0 to 10 μg/m³, it would represent a further change in the right direction.

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