Massachusetts ثاني أكسيد الكبريت (SO₂) المستوى

1.

Twin Falls, Idaho

جيد

1xabove Standard

2.

Pocatello, Idaho

جيد

1xabove Standard

3.

Idaho Falls, Idaho

جيد

1xbelow Standard

4.

Rexburg, Idaho

جيد

2xbelow Standard

5.

River Rouge, Michigan

جيد

3xbelow Standard

6.

Detroit, Michigan

جيد

3xbelow Standard

7.

Fort Worth, Texas

جيد

8xbelow Standard

8.

Saint Paul, Minnesota

جيد

8xbelow Standard

9.

Taos, New Mexico

جيد

8xbelow Standard

10.

Rensselaer, New York

جيد

8xbelow Standard