Nonattainment Areas for Ozone Pollution: United States and Territories, 1997

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Abstract/Contents

Abstract
This polygon shapefile depicts nonattainment and maintenance areas for the United States and its Territories for the enforcement of the ozone (O3) 8 hour NAAQS, which is 0.075ppm. Ozone (O3) is a photochemical oxidant and the major component of smog. While O3 in the upper atmosphere is beneficial to life by shielding the earth from harmful ultraviolet radiation from the sun, high concentrations of O3 at ground level are a major health and environmental concern. O3 is not emitted directly into the air but is formed through complex chemical reactions between precursor emissions of volatile organic compounds (VOC) and oxides of nitrogen (NOx) in the presence of sunlight. These reactions are stimulated by sunlight and temperature so that peak O3 levels occur typically during the warmer times of the year. Both VOCs and NOx are emitted by transportation and industrial sources. VOCs are emitted from sources as diverse as autos, chemical manufacturing, dry cleaners, paint shops and other sources using solvents. The reactivity of O3 causes health problems because it damages lung tissue, reduces lung function and sensitizes the lungs to other irritants. Scientific evidence indicates that ambient levels of O3 not only affect people with impaired respiratory systems, such as asthmatics, but healthy adults and children as well. Exposure to O3 for several hours at relatively low concentrations has been found to significantly reduce lung function and induce respiratory inflammation in normal, healthy people during exercise. This decrease in lung function generally is accompanied by symptoms including chest pain, coughing, sneezing and pulmonary congestion. Title 40, Part 50 of the Code of the Federal Regulations lists the ambient air quality standards for ozone. The 8 hour standard is incorporated within the Ozone dataset. This layer is part of the 2014 National Transportation Atlas Database.
Purpose
The National Transportation Atlas Databases 2014 (NTAD2014) is a set of nationwide geographic datasets of transportation facilities, transportation networks, associated infrastructure and other political and administrative entities. These datasets include spatial information for transportation modal networks and intermodal terminals, as well as the re¬lated attribute information for these features. This data supports research, analysis, and decision-making across all transportation modes. It is most useful at the national level, but has major applications at regional, state and local scales throughout the transportation community. The data used to compile NTAD2014 was provided by our partners within the United States Department of Transportation (USDOT) and by other agencies throughout the United States Federal Government. These contributors are the actual data stewards and are ultimately responsible for the maintenance and accuracy of their data. In United States environmental law, a nonattainment area is an area considered to have air quality worse than the National Ambient Air Quality Standards (NAAQS) as defined in the Clean Air Act Amendments of 1970 (P.L. 91-604, Sec. 109). Nonattainment areas must have and implement a plan to meet the standard or risk losing some forms of federal financial assistance or other consequences, such as industrial facilities being required to install pollution control equipment, enforce limits on their production and otherwise offset their emissions. An area may be a nonattainment area for one pollutant and an attainment area for others. This dataset establishes the spatial boundaries of each nonattainment and maintenance area.

Description

Type of resource cartographic, software, multimedia
Form Shapefile
Extent 6.851
Place Washington, D.C., US
Publisher United States. Bureau of Transportation Statistics
Date valid 1997
Publication date 2014
Edition Ozone_8hr_1997NAAQS v.1
Language English
Digital origin born digital
Map data Scale not given. ; W 123°6ʹ25ʺ--W 67°56ʹ36ʺ/N 45°25ʹ43ʺ--N 28°49ʹ27ʺ, Scale not given ; EPSG::4326

Creators/Contributors

Creator United States. Bureau of Transportation Statistics
Creator Stackhouse, Cecil

Subjects

Subject Ozone
Subject Pollution
Subject Air quality management
Subject Air quality—Standards
Subject United States
Subject Washington (D.C.)
Subject United States Virgin Islands
Subject Puerto Rico
Subject American Samoa
Subject Northern Mariana Islands
Subject Guam
Subject 1997
Subject Climatology, Meteorology and Atmosphere
Subject Health
Subject Boundaries
Subject Environment
Genre Geospatial data
Genre Cartographic dataset

Bibliographic information

Supplemental information The 8 hour standard is incorporated within the Ozone dataset.
Location https://purl.stanford.edu/dh456sh0677

Access conditions

Use and reproduction
This item is in the public domain. There are no restrictions on use.
Copyright
This work is in the Public Domain, meaning that it is not subject to copyright.

Preferred citation

United States. Department of Transportation. Research and Innovative Technology Administration. (2014). Nonattainment Areas for Ozone Pollution: United States and Territories, 1997. National Transportation Atlas Database 2014. Available at: http://purl.stanford.edu/dh456sh0677.

Collection

National transportation atlas databases : NTAD

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