The Hanoitimes - The first week of July, Hanoi’s air quality saw a significant improvement, according to the city’s Environment Protection Authority under the Department of Natural Resources and Environment.
On July 11, the Hanoi’s Environment Protection Authority said that the air quality index at the monitoring station improved more than that on July 10.
Specifically, the daily air quality index (the nearest 24 hours) at 10 monitoring stations in Hanoi (updated at 14 p.m): Trung Yen 3: 53 (average); Minh Khai - Bac Tu Liem: 73 (average); Hoan Kiem: 49 (good); Hang Dau: 75 (average); Kim Lien: 47 (good); Thanh Cong: 54 (average); Tan Mai: 54 (average); My Dinh: 50 (good); Pham Van Dong: 72 (average); Tay Mo: 54 (average). In general, the daily air quality at monitoring stations in Hanoi is at average level.
A green corner of Hanoi from above
The air quality measured at monitoring stations around the city reached levels of ‘good’ and ‘average’. Significantly, the number of days with ‘good’ air quality rose in comparison with the previous week.
Mai Trong Thai, the authority head, added that the measured air quality index (AQI) fluctuated between 40 to 94 points which were equivalent to ‘average’ and ‘good’ levels. There was no day with air quality dropping to ‘bad’ level.
Urban air monitoring stations of Trung Yen in Cau Giay district, Kim Lien in Dong Da district, My Dinh in Nam Tu Liem district and Tan Mai in Hoang Mai district showed increases in good air quality days, accounting for 100%, 71.4%, 71.4%, 57.1%, and 42.9% respectively. No monitoring indicator exceeds the Vietnamese standard.
At urban traffic site air monitoring stations on Hang Dau street, Hoan Kiem and Thanh Cong areas, the AQI remained at the average level. Hoan Kiem air monitoring station, however, acknowledged one day with AQI at a good level on July 5.
Meanwhile, the records by two air monitoring stations in Minh Khai ward, Hai Ba Trung district and on Pham Van Dong street in Bac Tu Liem district showed that during last week, air quality stayed at the average level under the pressure of high traffic.
The highest AQI tracked in these areas were 94 and 78 respectively, with the highest daily concentrations of fine particulate matter (PM2.5) of 44.7µg/m3 and 40.29µg/m3 respectively, below the Vietnamese air standard of 50µg/m3.