Qualité de l’air à Chengdu

Indice de qualité de l’air (IQA) et pollution de l’air (PM2.5) à Chengdu

DERNIÈRE MISE À JOUR (Heure locale)

1.43M personnes suivent cette ville

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Carte IQAir avec points colorées AQI

Temps

Quel temps fait-il actuellement à Chengdu?

Icône météo
TempsNuages éparses
Température64.4°C
Humidité67%
Vent6.7 mp/h
Pression1021 mb

Classement IQA des villes en direct

Classement en direct des principales villes en Chine

Icône d'info-bulle
#cityIQA US
1 Yuxia, Province de Shaanxi

180

2 Baoji, Province de Shaanxi

179

3 Jieyang, Province de Guangdong

177

4 Chaozhou, Province de Guangdong

171

5 Tongchuan, Province de Shaanxi

169

6 Haimen, Province de Guangdong

168

7 Fuyang, Province d'Anhui

166

8 Weinan, Province de Shaanxi

166

9 Huaiyuan Chengguanzhen, Province d'Anhui

165

10 Xi'an, Province de Shaanxi

163

(Heure locale)

CLASSEMENT MONDIAL DE l’IQA

Classement IQA en direct à Chengdu

Classement de la qualité de l’air en direct à Chengdu

Icône d'info-bulle
#stationIQA US
1 Longquanyiququzhengfu

95

2 Qingbaijiang Technician Branch

88

3 Huayang

86

4 Dashi West Road

80

5 Lingyansi

78

6 Science City

78

7 Junping Street

76

8 Shahepu

76

9 Jinquan Lianghe

70

10 Sanwayao

70

(Heure locale)

CLASSEMENT MONDIAL DE l’IQA

IQA US

76

IQA en direct
Moyen

Visage humain indiquant le niveau AQI

Vue d’ensemble

Quelle est la qualité de l’air actuellement à Chengdu?

Niveau de pollution de l’airIndice de pollution de l’airPrincipaux polluants
Moyen 76 IQA UStrendPM2.5
PolluantsConcentration
PM2.5
24 µg/m³trend
pm10
33 µg/m³trend
o3
71.5 µg/m³trend
no2
31 µg/m³trend
so2
4 µg/m³trend
co
600 µg/m³

Recommandations de santé

Comment se protéger de la pollution de l’air à Chengdu?

Une icône de fenêtre ouverteFermez vos fenêtres pour empêcher à l'air pollué de rentrer.
Une icône d'une personne qui fait du véloLes groupes sensibles doivent éviter les activités de plein air.

Prévision

Prévision de l’indice de qualité de l’air (IQA) à Chengdu

JourNiveau de pollutionTempsTempératureVent
mercredi, mars 3

Mauvais pour les personnes sensibles 116 IQA US

Visage humain indiquant le niveau AQI
jeudi, mars 4

Mauvais pour la santé 156 IQA US

Visage humain indiquant le niveau AQI
vendredi, mars 5

Mauvais pour les personnes sensibles 146 IQA US

Visage humain indiquant le niveau AQI
Aujourd’hui

Moyen 87 IQA US

Visage humain indiquant le niveau AQI
Icône météo64.4°53.6°
Vent tournant à 224 degré

2.2 mp/h

dimanche, mars 7

Mauvais pour la santé 197 IQA US

Visage humain indiquant le niveau AQI
Icône météo60.8°50°
Vent tournant à 27 degré

2.2 mp/h

lundi, mars 8

Mauvais pour la santé 197 IQA US

Visage humain indiquant le niveau AQI
Icône météo60.8°51.8°
Vent tournant à 121 degré

2.2 mp/h

mardi, mars 9

Mauvais pour la santé 197 IQA US

Visage humain indiquant le niveau AQI
Icône météo59°53.6°
Vent tournant à 40 degré

2.2 mp/h

mercredi, mars 10

Mauvais pour la santé 198 IQA US

Visage humain indiquant le niveau AQI
Icône météo68°53.6°
Vent tournant à 166 degré

0 mp/h

jeudi, mars 11

Mauvais pour la santé 198 IQA US

Visage humain indiquant le niveau AQI
Icône météo69.8°57.2°
Vent tournant à 178 degré

2.2 mp/h

vendredi, mars 12

Mauvais pour la santé 198 IQA US

Visage humain indiquant le niveau AQI
Icône météo68°59°
Vent tournant à 29 degré

2.2 mp/h

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Historique

Graphique de l’historique de la qualité de l’air à Chengdu

Comment se protéger au mieux de la pollution de l’air?

Réduire votre exposition à la pollution de l’air à Chengdu

ANALYSES ET STATISTIQUES DE LA QUALITé DE L’AIR POUR Chengdu

What are the main causes of pollution In Chengdu?

Like many cities in China, Chengdu suffers from the same pollutive issues that afflicts cities undergoing rapid development, with large amounts of rural to urban migration still occurring, and massive changes having occurred in many cities throughout China over the last two decades.

Among the main causes would be prominent ones such as fumes and emissions from vehicles. With a population of some 16.3 million people, there would be a huge amount of accompanying cars and motorbikes, as well as heavy duty vehicles such as trucks, lorries and buses.

The amounts of personal cars in Chengdu have shot up over the last few years, with estimates of vehicle counts increasing by some 20 thousand a month in 2011. At the same time, due to its geographical location in Sichuan basin, Chengdu is subject to lesser amounts of wind as well as higher humidity levels, thus allowing smoke and haze given off from vehicles to accumulate within the cities air, unable to disperse.

Other prominent causes of pollution would be the industrial sector, with numerous factories across the cities limits working at high capacity, often running on fossil fuels such as coal, which puts out enormous amounts of chemical pollutants as well as fine particulate matter. These would be the two compounding factors for pollution in Chengdu.

When is pollution at its worst in Chengdu?

Observing the data taken over 2019, Chengdu came in with its worst readings of pollution in the beginning portion of the year, as well as at the very end, showing that from year to year, Chengdu would have its descent into poor levels of air quality hit a peak in December, which would continue into the next year before gradually abating in March, and dropping further from then on out till it reached the end of the year spike again.

With the data available, the most polluted months in order were December, January and February, with PM2.5 readings of 77.1 μg/m³, 76.6 μg/m³ and 55.7 μg/m³ respectively.

These readings placed all of these months into the ‘unhealthy’ ratings bracket, which as the name implies is highly detrimental for those caught in the city during these times, particularly in the areas where the pollution tends to emanate from, such as areas of high traffic as well as industrial zones. Being put into the unhealthy ratings bracket requires a PM2.5 reading of anywhere between 55.5 to 150.4 μg/m³ to be classified as such, a number that is very high indeed and would come with a vast amounts of detrimental health effects.

When is Chengdu's air at its cleanest?

Following from the previous question, after the aforementioned spikes in PM2.5 start to subside in March, the air from there on out is at its cleanest, until November comes around and the pollution levels once again begin to rise.

To quote some figures, March came in with a PM2.5 reading of 44 μg/m³, a fair drop from Februarys reading of 55.7 μg/m³. Such large discrepancies between different months of the year is often a great cause for concern, indicating that seasonal pollution problems can cause mortality rates to soar and be of great detriment to a country’s citizens and economy.

May through to October all had the cleanest readings, within the ‘moderate’ ratings bracket, with June, July and August being the best of the year, with readings of 24 μg/m³, 22.5 μg/m³ and 28.2 μg/m³ respectively. This puts July at the cleanest month out of the entire year.

What are some of the main pollutants in Chengdu?

With much of its pollution arising from vehicular emissions as well as factory effluence and coal burning, the pollutants in Chengdu's air would contain a vast array of dangerous compounds and particulate matters. Some of these would include ones such as nitrogen dioxide and sulfur dioxide, both of which are released from vehicle engines, as well as the incomplete combustion of fossil fuels such as coal, so they would both be present in areas that see large amounts of traffic as well as industrial sites.

Nitrogen dioxide is the more prominent one due to its massive release from vehicles, so much so to the point that the amount of pollution in any area can be quantified on how much is being caused by vehicles alone judging by the amount of nitrogen dioxide in the air, directly correlating with high volumes of traffic.

Pollutants such as this are known to trigger off aggravated asthma attacks, as well as causing damage to the lungs and heart. Other pollutants would be PM2.5 and PM10’s such as black carbon, a major component in soot, as well as volatile organic compounds (VOC’s) such as benzene, toluene, formaldehyde and tetrachloroethylene, all of which are highly detrimental to human health and the environment.

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