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Preliminary Assessments of Spatial Influences in the Ambos Nogales Region of the US-Mexican Border

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Abstract: Ambient air measurements collected from 1994 to 1995 were used in a preliminary assessment of potential source and spatial influences in the Ambos Nogales border region (Nogales, Arizona, USA and Nogales, Sonora, Mexico). In this assessment, volatile organic compounds (VOC) and particulate matter (PM) species were used from four sites, two on either side of the border. An examination of median levels and principal component analysis indicated the dominance of soil dusts and mobile sources. Pairwise comparisons of sites for VOCs associated with mobile sources revealed statistically significant differences between sites in the central Nogales area vs. the two sites furthest from the border. Particulate lead at Mexican sites was higher and significantly different vs. US sites. Although further analyses are necessary, findings suggest that local and immediate mobile/other anthropogenic and soil dust influences are present throughout Nogales, with particulate lead from leaded motor vehicle exhaust or soldering operations being a possible influence on the Mexican side.

The US Environmental Protection Agency through its Office of Research and Development partially funded and collaborated in the research described here under Contract 68-D5-0049 to ManTech Environmental Technology, Inc. It has been subjected to the Agency review and approved for publication. Mention of trade names or commercial products does not constitute endorsement or recommendation for use.
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Citation:Smith, L., S. Mukerjee, G. J. Monroy, and F. E. Keene. Preliminary Assessments of Spatial Influences in the Ambos Nogales Region of the US-Mexican Border. SCIENCE OF THE TOTAL ENVIRONMENT 276(1-3):83-92, (2001).
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Contact: Liz Hope - (919) 541-2785 or hope.elizabeth@epa.gov
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Division: Human Exposure & Atmospheric Sciences Division
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Branch: Source Apportionment & Characterization Branch
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Product Type: Journal
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Published: 07/20/2001
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Related Entries:
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Bullet Item Internal Grant: Development of Source Apportionment/Exposure Estimation Methods With Wind Direction (a Directional Analysis Assessment)
spacer Relationship Reason:   A Project of the Product
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Last Updated on Monday, October 22, 2007
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