Air quality in Kaifeng

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

Last update at (local time)

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Weather

What is the current weather in Kaifeng?

Weather icon
WeatherBroken clouds
Temperature84.2°C
Humidity23%
Wind17.9 mp/h
Pressure1009 mb

live aqi city ranking

Real-time China city ranking

#cityUS AQI
1 Jiuquan, Gansu

789

2 Wuwei, Gansu

760

3 Jiayuguan, Gansu

641

4 Turpan, Xinjiang

615

5 Jinchang, Henan

482

6 Kumul, Xinjiang

380

7 Hotan, Xinjiang

354

8 Sanmenxia, Henan

282

9 Zhoukou, Henan

238

10 Zhangye, Gansu

226

(local time)

SEE WORLD AQI RANKING

live Kaifeng aqi ranking

Real-time Kaifeng air quality ranking

#stationUS AQI
1 North District Construction Command

134

2 Cancer Hospital

112

3 Technician College

110

4 Gulou District Government

80

5 Longting Park

77

6 Yujing Park

77

7 Century Star Kindergarten

72

(local time)

SEE WORLD AQI RANKING

US AQI

75

live AQI index
Moderate

Human face indicating AQI level

Overview

What is the current air quality in Kaifeng?

Air pollution levelAir quality indexMain pollutant
Moderate 75 US AQItrendPM10
PollutantsConcentration
PM2.5
13.5µg/m³trend
PM10
103µg/m³trend
O3
126.5µg/m³trend
NO2
5µg/m³trend
SO2
6µg/m³trend
CO
500µg/m³
!

PM2.5

x2.7

PM2.5 concentration in Kaifeng air is currently 2.7 times above the WHO annual air quality guideline value

Health Recommendations

How to protect from air pollution in Kaifeng?

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

Forecast

Kaifeng air quality index (AQI) forecast

DayPollution levelWeatherTemperatureWind
Sunday, May 22

Moderate 82 US AQI

Human face indicating AQI level
Weather icon91.4°66.2°
Wind rotating 200 degree

13.4 mp/h

Monday, May 23

Moderate 88 US AQI

Human face indicating AQI level
Weather icon91.4°62.6°
Wind rotating 187 degree

8.9 mp/h

Tuesday, May 24

Moderate 89 US AQI

Human face indicating AQI level
Weather icon95°68°
Wind rotating 198 degree

6.7 mp/h

Today

Moderate 75 US AQI

Human face indicating AQI level
Weather icon89.6°69.8°
Wind rotating 32 degree

22.4 mp/h

Thursday, May 26

Moderate 93 US AQI

Human face indicating AQI level
Weather icon91.4°60.8°
Wind rotating 28 degree

6.7 mp/h

Friday, May 27

Unhealthy 155 US AQI

Human face indicating AQI level
Weather icon95°69.8°
Wind rotating 212 degree

15.7 mp/h

Saturday, May 28

Unhealthy 153 US AQI

Human face indicating AQI level
Weather icon96.8°73.4°
Wind rotating 210 degree

17.9 mp/h

Sunday, May 29

Unhealthy 179 US AQI

Human face indicating AQI level
Weather icon104°68°
Wind rotating 303 degree

20.1 mp/h

Monday, May 30

Moderate 65 US AQI

Human face indicating AQI level
Weather icon93.2°64.4°
Wind rotating 42 degree

8.9 mp/h

Tuesday, May 31

Moderate 97 US AQI

Human face indicating AQI level
Weather icon104°68°
Wind rotating 204 degree

15.7 mp/h

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Historical

Historic air quality graph for Kaifeng

How to best protect from air pollution?

Reduce your air pollution exposure in Kaifeng

AIR QUALITY ANALYSIS AND STATISTICS FOR Kaifeng

What is the level of air pollution in Kaifeng?

Kaifeng is a prefecture-level city in east-central Henan province, China. It is one of the eight ancient capitals of China. It is situated on the south bank of the Yellow River and had an estimated population of 4.5 million in 2019.

In 2021, it was experiencing a period of air quality that was classed as being “Unhealthy for sensitive groups” with a US AQI reading of 102. This is in accordance with recommendations by the World Health Organisation (WHO). The recorded levels of the six main pollutants were as follows: PM2.5 - 36 µg/m³, PM10 - 133.5 µg/m³, ozone (O3) - 90 µg/m³, nitrogen dioxide (NO2) - 18 µg/m³, sulphur dioxide (SO2) - 10 µg/m³ and carbon monoxide (CO) - 500 µg/m³. In order to protect yourself from air pollution in Kaifeng, it is advisable to keep doors and windows closed to avoid the dirty outdoor air. Those who are sensitive to dirty air should avoid going outdoors until the quality improves. Even healthy people are advised not to exercise outside under these conditions and operate an air purifier if one is available.

Does the air quality in Kaifeng vary throughout the year?

Air quality can differ throughout the day let alone throughout the year. It is dependent on many factors which can change very quickly.

Looking back at the recently released figures from the Swiss company IQAir.com, it can be seen that the air quality in Kaifeng seems dependent on the seasons of the year. From early May until the end of September, Kaifeng enjoyed a period of “Moderate” quality air with readings between 12.1 and 35.4 µg/m³. During spring and autumn, it deteriorated to the classification of being “Unhealthy for sensitive groups” with figures of between 35.5 and 55.4 µg/m³. This occurred during March and April and again in October. The winter months saw the quality decline to being “Unhealthy” with readings between 55.5 and 150.4 µg/m³.

Records have been kept since 2017 regarding the air quality and by studying past records it can be seen to be steadily improving. The first recorded figure was 66.8 µg/m³ followed by 64.6 µg/m³ the following year. Another improvement for 2019 with a reading of 61 µg/m³ before the 2020 figure of 55.5 µg/m³. This latest figure could well be lower due to the COVID-19 pandemic which stopped the movement of people and vehicles and suspended certain industrial activities.

Where does the polluted air in Kaifeng come from?

Looking at the sources of pollution: coal, industry, motor vehicles and dust are the main sources, accounting for about 90 per cent. The structure of this region is heavy industry. The energy source is dominated by coal, and the transportation structure is dominated by roads. The output of steel, coke, glass and raw materials all account for more than 40 per cent of the country output, and the coal consumption per unit of land area is four times the national average. 80 per cent of the bulk materials are transported by diesel trucks, and the emission intensity is high from these large old vehicles.

Affected by heating, the monthly average emission levels of PM2.5, organic carbon, black carbon and other components in this area in autumn and winter are 1.5 to 4 times that of non-heating seasons. In cities with large amounts of scattered coal production, such as Yangquan, Changzhi, and Jincheng, the emission levels of the above-mentioned pollutants are higher in autumn and winter.

What can be done to improve air quality in Kaifeng?

The "root cause" of air pollution is emissions, the weather is the inducement, and the secondary conversion of complex particulate matter is the catalyst. Most of the primary pollutants in heavily polluted weather are PM2.5. What are the main components of the particles with a diameter less than or equal to 2.5 microns, and where do they come from? This is a question that needs to be understood when prescribing the right medicine. Research studies have shown that the emissions of pollutants such as sulphur dioxide, nitrogen oxides, PM2.5, inhalable particulate matter (PM10), volatile organic compounds, ammonia, and carbon monoxide in many cities decreased by between 6 and 31 per cent year-on-year. Among them, sulphur dioxide emissions fell the most and ammonia emissions fell the least.

In the "blacklist" of PM2.5 components, organic matters are ranked first. At present, there are more than 100 types of organic matter under scrutiny, mainly from the primary emission of loose coal combustion, motor vehicle exhausts and the secondary conversion of volatile organic compounds. With the effective control of loose coal combustion emissions, the proportion of organic matter is declining. As one of the main pollutants in the atmosphere, sulphur dioxide is an important factor that causes acid rain, and it was once the most important source of secondary PM2.5. Many regions have always regarded the control of total sulphur dioxide emissions as the top priority of air pollution control.

How do the main pollutants affect human health?

The main pollutants affecting human health are particulate matter, ground-level ozone (O3) and nitrogen dioxide (NO2). The particles that damage human health are called PM2.5. These particles can penetrate deeply into the lungs and enter the bloodstream, affecting different organs and body functions. These particles may be emitted directly or formed in the atmosphere by several different emission pollutants (for example, ammonia (NH3) and volatile organic compounds (VOCs).

Ozone (O3) is an important secondary pollutant. It has a strong irritation to the lungs and will hinder the growth of plants. It is also a powerful greenhouse gas (GHG). When certain precursor pollutants react in the sun, O3 is formed in the troposphere near the surface of the earth. The powerful greenhouse gas methane (CH4) is a large part of the cause of the formation of O3. This tropospheric ozone is different from the upper atmosphere (stratosphere) ozone, which protects us from the sun’s ultraviolet rays.

Nitrogen oxides (NOx) are a group of chemical compounds that pollute the air. They are composed of nitrogen dioxide (NO2) and nitric oxide (NO). Among these compounds, NO2 is the most harmful and is produced by human activities. It will affect human health, reduce atmospheric visibility, and have a major impact on climate change. Finally, it is the key precursor for the formation of O3.

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