加德滿都的空气质量

加德滿都的空气质量指数(AQI)和PM2.5空气污染

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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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Nepal governement的主页标志AirNow Department of State的主页标志U.S. Department of State的主页标志Environmental Protection Agency的主页标志Nepal governement的主页标志AirNow Department of State的主页标志

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天气

加德滿都现在的天气怎么样?

天气图标
天气少云
温度69.8°C
湿度30%
风速和风向4.6 mp/h
气压1016 mb

实时AQI城市排名

实时尼泊尔 热门城市排名

小提示图标
#city美国 AQI
1 Siddharthanagar, Western Region

158

2 Nepalgunj, Mid Western

155

3 Dhankuta, Eastern Region

154

4 Tulsipur, Mid Western

130

5 Patan, Central Region

105

6 巴克塔普爾, Central Region

88

7 Itahari, Eastern Region

83

8 吉爾蒂布爾, Central Region

69

9 加德滿都, 中部开发区

68

10 博克拉, Western Region

63

(当地时间)

查看世界AQI排名

实时加德滿都 AQI排名

实时加德滿都空气质量排名

小提示图标
#station美国 AQI
1 US Embassy in Phora Durbar

107

2 US Embassy in Kathmandu

97

3 Ratnapark - Kathmandu

68

(当地时间)

查看世界AQI排名

美国 AQI

68

实时空气质量指数(AQI)
中等

表示AQI等级的人脸

概览

加德滿都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
中等 68 美国 AQItrendPM2.5
污染物浓度
PM2.5
20.2 µg/m³trend
pm10
61.6 µg/m³

健康建议

加德滿都空气污染,如何做好防护?

开窗图标请关窗以防止室外脏空气进入室内
骑车图标敏感人群应减少室外运动

预报

加德滿都空气质量指数(AQI)预报

污染等级天气温度风速和风向
星期三, 3月 3

不健康 157 美国 AQI

表示AQI等级的人脸
星期四, 3月 4

不健康 165 美国 AQI

表示AQI等级的人脸
星期五, 3月 5

不健康 157 美国 AQI

表示AQI等级的人脸
今天

不健康 152 美国 AQI

表示AQI等级的人脸
天气图标73.4°48.2°
风向172度流动

2.2 mp/h

星期日, 3月 7

对敏感人群不健康 123 美国 AQI

表示AQI等级的人脸
天气图标75.2°50°
风向235度流动

2.2 mp/h

星期一, 3月 8

对敏感人群不健康 125 美国 AQI

表示AQI等级的人脸
天气图标77°51.8°
风向270度流动

4.5 mp/h

星期二, 3月 9

对敏感人群不健康 127 美国 AQI

表示AQI等级的人脸
天气图标78.8°53.6°
风向266度流动

4.5 mp/h

星期三, 3月 10

对敏感人群不健康 131 美国 AQI

表示AQI等级的人脸
天气图标80.6°55.4°
风向254度流动

6.7 mp/h

星期四, 3月 11

对敏感人群不健康 136 美国 AQI

表示AQI等级的人脸
天气图标82.4°57.2°
风向267度流动

6.7 mp/h

星期五, 3月 12

对敏感人群不健康 133 美国 AQI

表示AQI等级的人脸
天气图标82.4°55.4°
风向282度流动

4.5 mp/h

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历史

加德滿都历史空气质量图表

如何更好地远离空气污染侵害?

减少您在加德滿都 空气的污染暴露值

加德滿都 空气质量分析和数据

How bad is air pollution in Kathmandu?

Kathmandu is a city located in Nepal, home to many different ethnic groups with both Hinduism and Buddhism being the main religions. It is the cultural hub of Nepal, being of importance to the country’s arts and history, as well as being the main economic zone. Currently Kathmandu is undergoing rapid growth, being one of the fastest growing cities in south Asia. As with all rapid growth and development comes a spike in pollution levels, and to compound the situation, a disastrous 7.8 magnitude earthquake that took place in 2015, levelling many areas of the city that still lay in ruin years later, which besides disrupting daily life is another source of pollution in of itself, due to large amounts of dust and finely ground particles being blown into the air from these sites.

Kathmandu came in with a PM2.5 reading of 48 μg/m³ as a yearly average over 2019, placing it into the ‘unhealthy for sensitive groups’ category, which requires a PM2.5 reading of anywhere between 35.5 to 55.4 μg/m³. This shows that Kathmandu came in on the higher end of this scale, meaning that the city is subject to some fairly bad levels of pollution year-round, with some months coming in considerably higher, such as January with a reading of 102.7 μg/m³, an extremely high number that would have placed Kathmandu into the ‘unhealthy’ bracket (55.5 to 150.4 μg/m³) at that point in time. Thus, pollution levels in Kathmandu are of concern to its citizens and their health.

What are the main causes of pollution in Kathmandu?

There are several causes of elevated pollution levels in Kathmandu, with both human and geographical factors coming together to form these heightened numbers. For a start, Kathmandu is situated in a location that places it deep within a valley and many mountain ranges around. It is also surrounded on both sides by China and India, economic giants who in their own rights still have many pollution problems, with cities from both countries often coming in ranked very highly amongst all polluted cities worldwide.

In regards to what is actually causing the pollution in Nepal, the large assortment of vehicles, many of which are ancient and running on outdated motors and diesel fuels would be responsible for pouring out high concentrations of fumes and noxious pollutants. Other sources include open burning of organic material as well as refuse, as with a lack of proper infrastructure comes problems pertaining to garbage collection and disposal, and as such many people resort to setting fire to their waste. This would cause a lot of fumes that come from the combustion of materials such as wood and plastic, all of which have many negative consequences on human health.

So, to summarize, the main causes of pollution in Kathmandu are open burn fires, vehicular emissions, dust from construction sites and damaged areas left over from the earthquakes, all compounded by its geographical location, lacking the elevation and wind to allow these pollutants to disperse properly, instead accumulating and rising to dangerous levels.

What are the main types of pollutants found in Kathmandu?

With many open burn sources and different types of outdated vehicles operating around the city, a large amount of pollution would come from combustion sources. Among them would be fine particulate matter such as black carbon, which is formed from the incomplete combustion of fossil fuels as well as organic material such as wood or plants. With these outdated vehicles often relying on diesel fuels, they would be pouring out large amounts of black carbon in the form of soot, which can permeate the atmosphere in areas of high traffic as well as coating roadsides and underpasses with thick black accumulations, not only being visually unappealing but having a host of carcinogenic properties. Other pollutants arising from vehicles would include carbon monoxide (CO), nitrogen dioxide (NO2), ozone (O3) and sulfur dioxide (SO2).

When are the most polluted months in Kathmandu?

Observing the data gathered over 2019, the months that came in with the cleanest readings of PM2.5 occurred in the middle portion of the year. PM2.5 refers to particulate matter that is 2.5 micrometers or less in diameter, and due to its small size and subsequent dangers to human health, is used as a major component in calculating overall air quality.

The cleanest month of 2019 was august, which came in with a reading of 11.8 μg/m³, putting it into the ‘good’ rating bracket, which requires a number between 10 to 12 μg/m³ to be classed as such, making it a bracket with a very fine margin of entry, and of note is that the air during this time of the year would be significantly healthier to breathe than other times.

The months with the worst readings were January through to May, as well as November and December, making the beginning and end of the year the time that pollution levels are at their highest. These pollution levels reached an absolute peak in January, with a reading of 102.7 μg/m³, followed by December with a reading of 75.6 μg/m³. In total, six months out of the year came in with unhealthy air quality ratings.

Is air quality improving in Kathmandu?

With existing data taken from the previous years, it is uncertain as to whether pollution levels in Kathmandu are improving or just fluctuating between different numbers that have similar levels of pollution. In 2017, a PM2.5 reading of 45.9 μg/m³ was recorded. This was followed by a fairly large increase the next year in 2018 of 54.4 μg/m³, showing that pollution between 2017 and 2018 had gotten significantly worse.

Moving into 2019, it is apparent that there was visible improvement, with its PM2.5 reading of 48 μg/m³. However, when compared to 2017’s reading this still shows a decline in air quality. As such the pollution levels in the year of 2020 and beyond will show whether the air quality in Kathmandu is actually improving and not just moving up and down by a few units each year.

With a city that is undergoing such a marked increase in its economy and all the growth associated with it, there will be a large amount of environmental challenges ahead as many developing cities in Asia have been witness to, many of which are still going through them. With a reduction in the amount of diesel fuel vehicles as well as open burn sources being cracked down on, Kathmandu may be able to see some form of improvement in its air quality in the years to come.

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