Hanoi is again the most polluted in the world, the air is thick and hazy on the weekend.

Today (March 9), the air quality index (AQI) in Hanoi reached 220, the highest in the world . Authorities recommend that people avoid exercising outdoors, run air purifiers, and close windows to avoid dirty air outside.

Hanoi is again the most polluted in the world, the air is thick and hazy on the weekend.

Sunday, March 9, 2025 14:04 PM (GMT+7)

Today (March 9), the air quality index (AQI) in Hanoi reached 220, the highest in the world. Authorities recommend that people avoid exercising outdoors, use air purifiers, and close windows to avoid dirty air outside.

The IQAir air pollution index measuring application at 1:00 p.m. this afternoon ranked Hanoi as the world's most polluted city with an AQI of 220. Following Hanoi are Beijing (192), Dhaka (178), and Delhi (172).

In Hanoi, the most polluted areas measured by measuring stations (AQI index from 200 to over 300 - the threshold harmful to human health) include Thach That district, Phu Thuong (Tay Ho), Ha Dong, Hoan Kiem, Tay Ho...

With the air quality index at hazardous levels like today, normal people should avoid outdoor activities, switch to indoor activities or move to another day when the air quality index is better. Close windows and doors to limit and avoid exposure to pollutants.

For sensitive people, it is necessary to avoid all outdoor activities and switch to indoor activities. Close windows and doors to limit and avoid exposure to pollutants. Image of a group of workers working outdoors in Ha Dong district.

The Thang Long Avenue area is foggy this afternoon.

Going out today, people may feel uncomfortable.

According to environmental experts, today, northern provinces and cities, including Hanoi, are experiencing temperature inversion, with cold nights and early mornings, sunny days, and low wind speeds that cannot diffuse pollutants.

On the contrary, all waste and fine dust PM2.5 generated are forced down to the lower atmosphere, creating a opaque fog in the morning, high concentrations of pollutants have negative effects on health.

Nguyen Trai street area, where the urban railway runs through.

Boats seen from Nhat Tan Bridge today.

Vo Chi Cong Street, the route connecting Hanoi center to Noi Bai airport.

AQI is an air quality monitoring index ranging from 0-500, the higher the index, the higher the level of pollution and the higher the impact on health.

In 2025, Hanoi will focus on priority tasks including perfecting policy institutions, inventorying emission sources, reducing emissions from major emission sources, prioritizing solutions in inner-city areas with high population density, traffic and economic development; establishing a warning and response mechanism to increasingly serious air pollution.

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Source: https://danviet.vn/ha-noi-lai-o-nhiem-dung-dau-the-gioi-khong-khi-dac-quanh-mu-mit-ngay-cuoi-tuan-20250309133959295.htm