Hanoi الأوزون (O₃) المستوى

1.

Ho Chi Minh City, Ho Chi Minh

جيد

1xbelow Standard

2.

Thanh pho Thai Nguyen, Thai Nguyen

جيد

2xbelow Standard

3.

Tra Vinh, Tra Vinh

جيد

2xbelow Standard

4.

Cao Bang, Cao BaNg

جيد

2xbelow Standard

5.

Lang Son, Lang Son

جيد

2xbelow Standard

6.

Bac Giang, Bac Giang

جيد

3xbelow Standard

7.

Lao Cai, Lao Cai

جيد

3xbelow Standard

8.

Bac Ninh, Bac Ninh

جيد

4xbelow Standard

9.

Haiphong, HaI Phong

جيد

5xbelow Standard

10.

Hai Duong, Hai Duong

جيد

6xbelow Standard