Thai Nguyen ไนโตรเจนไดออกไซด์ (NO₂) ระดับ

1.

Tra Vinh, Tra Vinh

ดี

1xabove Standard

2.

Vinh, Nghe An

ดี

1xbelow Standard

3.

Da Nang, Da Nang

ดี

2xbelow Standard

4.

Pleiku, Gia Lai

ดี

2xbelow Standard

5.

Lao Cai, Lao Cai

ดี

2xbelow Standard

6.

Quy Nhon, Binh Dinh

ดี

3xbelow Standard

7.

Ho Chi Minh City, Ho Chi Minh

ดี

3xbelow Standard

8.

Thanh pho Thai Nguyen, Thai Nguyen

ดี

3xbelow Standard

9.

Thanh Xuan District, Ha Noi

ดี

3xbelow Standard

10.

Hanoi, Ha Noi

ดี

3xbelow Standard