Qualité de l’air à Hanoï

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

DERNIÈRE MISE À JOUR (Heure locale)

2.01M personnes suivent cette ville

Contributeurs de données sur la qualité de l'air

Données fournies par

Contributeurs

4

Sources de données

5

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Temps

Quel temps fait-il actuellement à Hanoï?

TempsPartiellement nuageux
Température68°C
Humidité52%
Vent9.2 mp/h
Pression1020 mb

Classement IQA des villes en direct

Classement en direct des principales villes au Vietnam

#cityIQA US
1 Hanoï, Hanoi

154

2 Neo, Tinh Bac Giang

154

3 Me Linh, Hanoi

147

4 Đồng Hới, Tinh Quang Binh

144

5 Province de Hà Tĩnh, Tinh Ha Tinh

139

6 Gia Binh, Tinh Bac Ninh

127

7 Quoc Oai, Hanoi

125

8 Soc Son, Hanoi

125

9 Pho Moi, Tinh Bac Ninh

123

10 Hai BaTrung, Hanoi

117

(Heure locale)

CLASSEMENT MONDIAL DE l’IQA

Classement IQA en direct à Hanoï

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

#stationIQA US
1 P. Gia Thuong

160

2 Ngoc Thuy

154

3 To Ngoc Van

154

4 GreenID

146

5 Hà Nội: Trụ sở Công an P .Hàng Mã (KK)

130

6 US Embassy in Hanoi

122

7 Hà Nội: Chi cục BVMT (KK)

115

8 Hà Nội: Tòa nhà quản lý Hồ Thành Công (KK)

97

9 Thành Công

93

10 Phạm Văn Đồng

92

(Heure locale)

CLASSEMENT MONDIAL DE l’IQA

IQA US

154

IQA en direct
Mauvais pour la santé

Vue d’ensemble

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

Niveau de pollution de l’airIndice de pollution de l’airPrincipaux polluants
Mauvais pour la santé154 IQA USPM2.5
PolluantsConcentration
PM2.5
61.2 µg/m³

Recommandations de santé

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

Portez un masque en extérieur.
Se procurer un masque
Utilisez un purificateur d'air.
Se procurer un purificateur d’air
Fermez vos fenêtres pour empêcher à l'air pollué de rentrer.
Évitez les activités de plein air.

Prévision

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

JourNiveau de pollutionTempsTempératureVent
lundi, nov. 30

Mauvais pour les personnes sensibles 105 IQA US

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mardi, déc. 1

Mauvais pour la santé 152 IQA US

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mercredi, déc. 2

Mauvais pour les personnes sensibles 146 IQA US

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Aujourd’hui

Mauvais pour les personnes sensibles 120 IQA US

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weather icon68°60.8°

8.9 mp/h

vendredi, déc. 4

Mauvais pour la santé 172 IQA US

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weather icon69.8°57.2°

8.9 mp/h

samedi, déc. 5

Mauvais pour la santé 189 IQA US

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weather icon69.8°55.4°

6.7 mp/h

dimanche, déc. 6

Mauvais pour la santé 183 IQA US

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weather icon73.4°57.2°

2.2 mp/h

lundi, déc. 7

Mauvais pour la santé 176 IQA US

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weather icon75.2°59°

6.7 mp/h

mardi, déc. 8

Mauvais pour la santé 174 IQA US

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weather icon73.4°64.4°

4.5 mp/h

mercredi, déc. 9

Mauvais pour la santé 172 IQA US

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weather icon77°64.4°

0 mp/h

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Historique

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

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

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

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

Is the air quality in Hanoi very poor?

In 2019 The Air Pollution Index rose to an unprecedented level of 385. IQAir Airvisual receives data from 10 monitoring stations which are operated by the local authorities and 4 others operated by non-profit organisations.

The AQI is a standard measurement system used worldwide to determine the level of airborne pollutants. The figures range from zero to five hundred where the lower the figure, the cleaner the air is. People who are more susceptible to breathing difficulties should avoid long periods of exposure when the number is higher than 150. These include children, the elderly, pregnant women and those suffering from asthma.

The main cause of this poor air quality is blamed on the extremely high number of cars and motorbikes which pour into the city centre on a daily basis. Hanoi had eight days in 2019 with a PM2.5 reading lower than the national standard of 50 µg/m3 (micrograms per cubic meter). Also to blame is the burning of rice fields after the crops have been harvested. These fine particles are particularly bad as they penetrate deep into the lungs and cause health problems due to the restrictions they cause.

Is Hanoi’s air quality poor all of the time?

Hanoi often receives the accolade of being the most polluted city in the country and often in the region. On hot, humid days fog is formed and hangs over the city. Because of this, the circulation of air is restricted which, in turn, prevents the diffusion of the pollutants. Due to this phenomena, the particulates cannot escape and are trapped at ground level which causes the poor air quality.

Hanoi ranked as the second most polluted city in Southeast Asia in 2019 by IQAir Airvisual with recorded PM2.5 figures of 40.8 µg/m3 which was an improvement on the 2017 figure of 45.8 µg/m3. Both these figures are above the recommended average levels of 10 micrograms as suggested by the WHO (World Health Organisation).

PM is the abbreviation used to describe Particle Matter and it refers to a mixture of both liquid droplets and solid particles found in the air. The more specific figure of PM 2.5 refers to ultra-fine particles which are a fraction of the width of a human hair. These particles are released through the burning of fossil fuels by industry and vehicles, but also from natural sources, such as dust and fine grains of sand.

What is the main cause of pollution in Hanoi?

500 tons of charcoal and 700 tons of waste are estimated to be burnt on a daily basis in and around Hanoi. The result of burning these materials causes Carbon Dioxide, and other toxic gases such as Sulphur Dioxide and Carbon Monoxide. Grass and stubble leftover from the harvest are burnt in order to prepare the ground for the next crop. Hundreds and thousands of hectares of land surrounding Hanoi are incinerated. It is estimated that over 300,000 tons of straw are burnt annually. Also contributing to this is a temperature inversion. This is when heat disperses from the ground into the atmosphere causing the creation of fog at relatively low levels. The fog traps the polluted air and prevents it escaping.

Within the city limits, there are thousands of households who use charcoal as their main source of energy to use in their stoves. City restaurants also offer barbeque cooked food. Together these factors combine to give Hanoi the reputation of being a heavily polluted city.

An official survey of 180,000 households showed that in the Red River Delta, 58 per cent burned their old straw. This region alone produces 1.2 – 4.7 million tons of CO2 and 28,000- 113,000 tons of CO. An average paddy field produces 1 ton of waste material and Vietnam annually produces almost 50 million tons of such waste.

The honeycomb charcoal stove which is favoured by so many households is popular because it is so cheap to use. On average the charcoal costs just 50 cents per day, whereas the same use of electricity would cost over ten times that amount - $5.60. The initial cost of the equipment has also got to be taken into account. An electric stove will be far more expensive than the clay or metal container used to hold the honeycomb charcoal. The CO2 emitted by this charcoal is equivalent to 1,870 tons, annually.

Construction sites produce a huge amount of dust from the demolition of the existing building and this continues whilst building the new project with cement and brick dust being ever-present. It is thought that new laws will be introduced to make the contractors talk more responsibility for the state of their site and the ensuing pollution it causes.

How deadly is air pollution In Hanoi?

In 2016 over 60,000 people died from lung cancer, heart disease, strokes and other related diseases all caused by breathing poor quality air. This equates to 165 daily deaths due to air pollution. The air quality on average is well below the World Health Organisation’s benchmark and, as such could reduce life expectancy by one year. Hospitals often report a marked increase in patients with breathing difficulties at times when the air quality is noticeably poor.

How do people cope with this situation?

Most people choose to wear a face-mask when spending time outdoors. They vary in price and quality but needless to say, better quality ones cost a little more. You can check out the IQAir KN95 masks available on our online store. Should you feel particularly vulnerable you may want to consider buying an air purifier for your home. This is especially vital if you have pre-existing respiratory problems. Other than that, you may find it necessary to remain indoors and close all the windows. This is not an ideal solution, but it will help keep some of the dirty air out. Another option is to get away for a few days from the polluted city. Try and head for the coast where the air is almost certainly cleaner because of its proximity to the ocean and the refreshing breezes.