Hung Yen ไนโตรเจนไดออกไซด์ (NO₂) ระดับ

1.

Vinh, Nghe An

ดี

1xbelow Standard

2.

Tra Vinh, Tra Vinh

ดี

1xbelow Standard

3.

Ho Chi Minh City, Ho Chi Minh

ดี

1xbelow Standard

4.

Thanh Xuan District, Ha Noi

ดี

2xbelow Standard

5.

Hanoi, Ha Noi

ดี

2xbelow Standard

6.

Quy Nhon, Binh Dinh

ดี

2xbelow Standard

7.

Bac Ninh, Bac Ninh

ดี

2xbelow Standard

8.

Thanh pho Thai Nguyen, Thai Nguyen

ดี

2xbelow Standard

9.

Phu Ly, Ha Nam

ดี

2xbelow Standard

10.

Lao Cai, Lao Cai

ดี

3xbelow Standard