Sacaton Middle School

San Juan School District

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Tuba City Jr. High School

Monument Valley High School

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Cholla Power Plant

Fort Valley Experimental Forest

Grand Canyon Field Trip

Carl Bowman of the National Park Service showed students several air quality monitoring stations at the Grand Canyon. Students saw the transmissometer at Grand View, which receives and measures a beam of light shot from Moran Point. The transmissometer helps Bowman calculate the particulates in the air by measuring the amount of light lost between points. Students also viewed the nephelometer and particle sampler. Every three days the particle sampler's filter is sent to an off-site lab where the particulates are identified.

Bowman told students the most significant factor effecting air quality at the Grand Canyon is vehicle emissions, while coal emissions run a close second.