Site

State

PM AQI* (ug/m3)

Roosvelt

UT

25

Salmon PM2.5

ID

20

Vernal #4

UT

18

Idaho City

ID

8

Idaho Falls / Penford

ID

7

Smithfield

UT

5

Ranchos

NV

4

Preston PM25 BAM

ID

4

Ketchum

ID

4

RT

NV

4