According to data from the IQAir Air Pollution Index Application, at 7:45 am this morning, Hanoi was the 5th most polluted city in the world with an AQI of 196 - an unhealthy level for health.
Notably, at 7:00 a.m. this morning, many areas in the city recorded AQI at the purple threshold - very bad for health. Typical examples are Quang Khanh AQI 277, Ciputra E5 AQI 230 stations and Dong Truc commune, Thach That district (now Ha Bang commune) AQI 222.
According to the monitoring system of the Department of Environment (Ministry of Agriculture and Environment), at 7:00 a.m. this morning, at the measuring station at the gate of Hanoi University of Science and Technology on Giai Phong Street, the AQI was 172 - the bad level - normal people began to have effects on their health, sensitive groups may have health problems. At the same time yesterday morning, the AQI index at this point was 118.
At station 556 Nguyen Van Cu at 7:00 a.m. this morning, the AQI was 158. Higher than the same time yesterday morning was 61.
Nhan Chinh Park - Khuat Duy Tien measuring station, AQI at 7:00 a.m. is 100.
According to Dr. Hoang Duong Tung - Chairman of the Vietnam Clean Air Network, the North often records a sharp increase in pollution from October to April. During this period, the weather is mainly calm, high humidity, little sunshine and fog. These factors make it difficult for the dust layer to diffuse to high ground, being compressed near the ground and accumulating for many days.
The end of the year is also the time when fine dust pollution increases due to changing seasons, but the main source of emissions still comes from human activities such as high density of private vehicles, many construction works, industrial plants around Hanoi and the habit of burning straw in the suburbs.
The winter weather has few winds and no rain, making it impossible for dust to diffuse or wash away, making the pollution level more obvious.
