Visibility Report to Congress - November 2001

Visibility in Mandatory Federal Class I Areas, 1994-1998
A Report to Congress

• Cover Page (pdf) (176.58 KB)
• Table of Contents (pdf) (83.34 KB)
• Front Pages (Abbreviations, Acronyms, Glossary of Terms) (pdf) (117.13 KB)
• Executive Summary (pdf) (253.37 KB)
• Chapter 1 - Introduction to Visibility Issues (pdf) (355.07 KB)
• Chapter 2 - Visibility in Individual Mandatory Federal Class I Areas (pdf) (3.54 MB)
• Chapter 3 - National and Regional Discussions of Visibility (pdf) (1.17 MB)
• Chapter 4 - References (pdf) (75.92 KB)
• Appendix A - List of 156 Mandatory Federal Class I Areas Where Visibility is an Important Value (pdf) (69.66 KB)
• Appendix B - Explanation of Method for Creating Summary Data from Raw IMPROVE Data (pdf) (61.7 KB)
• Appendix C - Methodology for Calculating Light Extinction from Monitored Aerosol Mass Data (pdf) (211.38 KB)
• Appendix D - Theil Method to Determine Statistically Significant Trends (pdf) (85.58 KB)
• Technical Report Data (pdf) (5.18 KB)