EarthWorks Geospatial Catalog

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

Author(s)
and
Description
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, NAD83This 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.
Publisher
California. Air Resources Board
Place(s)
California
Subject(s)
Nitrogen dioxide, Sulfur dioxide, Lead, Environmental monitoring, California. Air Quality Standards Section, Air quality management, Climatology, Meteorology and Atmosphere, Environment, and Health
Year
2011
Held by
Stanford
More details at
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.
Attribute Value
Click on map to inspect values