Visibility Reducing Particles: California State Area Designations, 2008-2011

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Abstract/Contents

Abstract
This polygon shapefile shows area designations in California as required under Health and Safety Code section 39608 for ozone, nitrogen dioxide, sulfur dioxide, lead, and visibility reducing particles. Visibility-reducing particles consist of suspended particulate matter, which is a complex mixture of tiny particles that consists of dry solid fragments, solid cores with liquid coatings, and small droplets of liquid. These particles vary greatly in shape, size and chemical composition, and can be made up of many different materials such as metals, soot, soil, dust, and salt. The designations are consistent with the criteria established in the California Code of Regulations, title 17, sections 70300 through 70306, and Appendices 1 through 3, thereof. There are three possible designation categories for lead (attainment, nonattainment, and unclassified), and there are four possible designation categories for ozone, nitrogen dioxide, sulfur dioxide, and visibility reducing particles (attainment, nonattainment, nonattainment-transitional, and unclassified). In addition, ozone nonattainment areas have been assigned a classification, commensurate with the severity of their air quality problem, under Health and Safety Code section 40921.5. The State area designations are reviewed annually and approved by the State Air Resources Board. Projection: Teale Albers, NAD83
Purpose
This shapefile can be used to identify visibility reducing particle area designations from the prior three-year period (2008-2011) in accordance with the California State Ambient Air Quality Standard.

Description

Type of resource cartographic, software, multimedia
Form Shapefile
Extent 4.647
Place Sacramento, California, US
Publisher California. Air Resources Board
Date valid 2011
Publication date 2011
Language English
Digital origin born digital
Map data Scale not given. ; Custom projection W 124°30ʹ22ʺ--W 113°29ʹ55ʺ/N 42°4ʹ8ʺ--N 32°25ʹ25ʺW 124°24ʹ35ʺ--W 114°7ʹ53ʺ/N 42°35ʺ--N 32°32ʹ3ʺ, Scale not given ; EPSG::4326

Creators/Contributors

Creator Stephen P. Teale Data Center (Calif.).
Creator California. Air Resources Board. Planning and Technical Support Division

Subjects

Subject Nitrogen dioxide
Subject Sulfur dioxide
Subject Lead
Subject Environmental monitoring
Subject California. Air Quality Standards Section
Subject Air quality management
Subject California
Subject 2011
Subject Climatology, Meteorology and Atmosphere
Subject Environment
Subject Health
Genre Geospatial data
Genre Cartographic dataset

Bibliographic information

Supplemental information The State area designations are reviewed annually and approved by the State Air Resources Board. In February 2011, the staff proposed a number of changes for ozone. The Board approved the proposed changes at a public hearing in May 2011. The Office of Administrative Law (OAL) approved and filed the 2011 State Area Designations rulemaking on September 8, 2011. The regulations became effective on October 8, 2011. Updated: 11/28/11
WGS84 Cartographics This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.
Location https://purl.stanford.edu/hq194zr5022

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

Teale Data Center GIS Lab. California Air Resources Board. (2011). Visibility Reducing Particles: California State Area Designations, 2008-2011. California Air Resources Board. Available at: http://purl.stanford.edu/hq194zr5022. Available at: http://purl.stanford.edu/hq194zr5022.

Collection

California Air Resources Board GIS Maps & Data

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