Matching Items (312)
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- Creators: McCulloch Bros.
- Creators: Pima County (Ariz.). Department of Environmental Quality
ContributorsMcCulloch Bros. (Photographer)
Created1920
DescriptionThe date assigned to this photograph is approximate.
ContributorsMcCulloch Bros. (Photographer)
Created1920
DescriptionThe date assigned to this photograph is approximate.
ContributorsMcCulloch Bros. (Photographer)
Created1920
DescriptionThe date assigned to this photograph is approximate.
ContributorsMcCulloch Bros. (Photographer)
Created1920
DescriptionThe date assigned to this photograph is approximate.
ContributorsMcCulloch Bros. (Photographer)
Created1920
DescriptionThe date assigned to this photograph is approximate.
ContributorsMcCulloch Bros. (Photographer)
Created1920
DescriptionThe date assigned to this photograph is approximate.
ContributorsMcCulloch Bros. (Photographer) / Fire Companies Adjustment Bureau (Phoenix, Ariz.) (Client)
Created1940-01-24
ContributorsMcCulloch Bros. (Photographer) / Fire Companies Adjustment Bureau (Phoenix, Ariz.) (Client)
Created1940-01-24
ContributorsPima County (Ariz.). Department of Environmental Quality (Publisher)
Created2011 to 2017
Description
Pima County Department of Environmental Quality monitors ambient (outdoor) air pollutants throughout eastern Pima County, including the Tucson metropolitan area and Green Valley. There are six principal pollutants, called “criteria” pollutants that are monitored in accordance with the National Ambient Air Quality Standards set by the Environmental Protection Agency to comply with the Federal Clean Air Act. These standards were established to protect public health and the environment from harmful levels of air pollution.