NPS: Nature & Science» Air Resources Division

Yosemite National Park

View From Turtleback Dome, elevation 5266 feet •
updated 05/06/2009 11:30 AM PDT

Photo captured by Olympus camera

Current Ozone at Turtleback Dome
as of 05/06/2009 • 11:00 AM PDT

Ozone

Current 1-hour average concentration

52 ppb

Current 8-hour average concentration

44 ppb

Good	Moderate	Unhealthy for Sensitive Groups	Unhealthy	Very Unhealthy

0	60	76	96	116 ppb

Current Particulate Matter at Yosemite Valley Visitor Center
as of 05/06/2009 • 10:00 AM PDT

Particulate Matter

More Data

Current 1-hour average PM2.5 concentration

7.0 ug/m3

Current 24-hour average PM2.5 concentration

7.0 ug/m3

Good	Moderate	Unhealthy for Sensitive Groups	Unhealthy	Very Unhealthy

0	15	40	65	150 ug/m3

Current Weather at Turtleback Dome
as of 05/06/2009 • 11:00 AM PDT

Weather

Additional Information

The Yosemite Valley Visitor Center monitoring site is operated by the California Air Resources Board.