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Created2001 to 2016
Description

The purpose of the ambient air monitoring network is to sample air pollution in a variety of settings, assess the health and welfare effects, and assist in determining sources of air pollution. In general, six basic monitoring objectives and five measuring scales are used to determine the network design. Since

The purpose of the ambient air monitoring network is to sample air pollution in a variety of settings, assess the health and welfare effects, and assist in determining sources of air pollution. In general, six basic monitoring objectives and five measuring scales are used to determine the network design. Since it is physically and fiscally impossible to monitor the air in every location, representative samples must be obtained. These samples are determined by using the monitoring objectives and the spatial measurement scales. The network must be dynamic enough to maintain a current representative sample of the air quality. Air quality issues such as eight-hour ozone non-attainment boundaries and permits for new sources are diverse and controversial subjects for the citizens of Maricopa County. With its robust air monitoring network and mobile monitoring tools, the department strives to provide the most reliable and relevant air monitoring data to the public.

Created2007 to 2015
Description

States are required to complete and submit to the U.S. Environmental Protection Agency an annual network monitoring plan. This plan informs the EPA of the monitoring activities ADEQ has implemented each year.

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Created2011-08
Description

A five-year assessment of ADEQ's ambient air quality monitoring network, providing a broader view of topics than is found in the complementary annual network monitoring plans that ADEQ produces.

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Created2015
Description

A five-year assessment of ADEQ's ambient air quality monitoring network, providing a broader view of topics than is found in the complementary annual network monitoring plans that ADEQ produces.

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Created1914-07-17
Description

Mounted black and white photograph with a typescript annotation, "July 17 1914. Making the trip down Bright Angel trail at the Grand Canyon of Arizona on mules. Left to right: George H. N. Luhrs, Jr., unknown, George H. N. Luhrs, Emma Luhrs, Ella Luhrs. Bright Angel Trail to the Colorado

Mounted black and white photograph with a typescript annotation, "July 17 1914. Making the trip down Bright Angel trail at the Grand Canyon of Arizona on mules. Left to right: George H. N. Luhrs, Jr., unknown, George H. N. Luhrs, Emma Luhrs, Ella Luhrs. Bright Angel Trail to the Colorado River, at bottom on canyon."

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Created1914-07-17
Description

Black and white print of the Grand Canyon with a typescript annotation, "July 17, 1914. Grand Canyon Arizona. On the left side you can see some of the mules taking people down the Bright Angel Trail to the bottom of the Canyon."

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ContributorsKolb Bros. (Photographer)
Created1914-07-17
Description

Black and white print with members of the Luhrs family. Typescript annotation, "July 17th, 1914. Going down Bright Angel Canyon of Arizona, Those on the mules, from bottom up: unknown, unknown, Ella Luhrs, Emma Luhrs, George H. N. Luhrs, unknown, Roger Hunt, George Luhrs Jr., Catherine Margarita 'Gretchen' (Mrs Geo

Black and white print with members of the Luhrs family. Typescript annotation, "July 17th, 1914. Going down Bright Angel Canyon of Arizona, Those on the mules, from bottom up: unknown, unknown, Ella Luhrs, Emma Luhrs, George H. N. Luhrs, unknown, Roger Hunt, George Luhrs Jr., Catherine Margarita 'Gretchen' (Mrs Geo H. N.) Luhrs standing beside George Luhrs Jr." Beside the trail, a sign displays, "Photo by Kolb Brothers."

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DescriptionBlack and white print of Frank and Tillie Luke on the rim of the Grand Canyon. Circa 1920-1929.
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Created1905-11-18
Description

Black and white print of six men and four women (unidentified) astride mules on a trail. One man sits on rocks beside the trail.

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Created1905-11-18
Description

Black and white print of one man and three women (unidentified) on a trail.