Educational Material on Visibility Science and Regulations 

AQ in Sequoia Kings Canyon NP	An interactive tutorial guiding the user through air quality issues impacting Sequoia Kings Canyon National Park.  This is the same tutorial available from kiosks at Sequoia Kings Canyon's visitor center.  This tutorial requires the Adobe Flash Player plug in which can be found here.
Introduction to Visibility	A pictorial guide to visibility starting from the fundamental principles for visibility impairment and causes of regional haze to aerosol concentration and trends.   Many of the concepts are dynamically illustrated using animated figures.
Exploring Visibility Concepts	An interactive tutorial that guides the user through a number visibility concepts and issues including the impact that haze has on a scene, the nature of light and how it colors what we see, particulate matter that comprises the haze and regulations addressing haze issues.  This tutorial requires the Adobe Flash Player plug in which can be found here.

  Visibility Trend Report - This document is the visibility chapter from EPA's 1997 National Air Quality and Emissions Trends Report.  The report presents an overview of the visibility regulations, causes of visibility impairment and trends in visibility.

Glossary of Terms - Definitions of terms and phrases used in visibility science.

 Regional Haze Guidance Documents- The Environmental Protection Agency, Draft Report, Reference Document for Regional Haze Tracking Progress Guidance is found here.

  Haze Rule Fact Sheet (PDF-27 KB) - Summary of the final regional haze rule, June 6, 1999.

  Regional Haze Rule (PDF-590 KB) - The final regional haze rule and preamble as it appeared in the April 1999 Federal Register.

  Complete Visibility Protection Rule (PDF-78 KB) - EPA's full visibility protection regulations, which consolidate EPA's 1980 visibility regulations and 1999 regional haze rule.

  Rule Development Timeline (PDF-8 KB) - Timeline indicating key milestones between 1977 and 1999.

  State Implementation Milestones (PDF-12 KB) - Timeline for state implementation activities, beginning in 1999.

Class I Areas Protected Under the Regional Haze Program

	List of the National Parks and Wilderness Areas
	Map of the National Parks and Wilderness Areas
	Map of the parks managed by the National Park Service
	Map of the wilderness areas managed by the U.S. Forest Service
	Map of the wilderness areas managed by the Fish and Wildlife Service