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What's New
The Causes of Haze Assessment (COHA) website is intended to be a dynamic and expanding resource. Our list of reports and products are growing and improving as we research the causes of haze at each site. Check this page for additions, improvements, and issues.
Detailed changes
Adding trajectory regression results to each site, December 21, 2004
Updated COHA regions, October 20, 2004
Backtrajectory map gallery added June 30, 2004
Moved hazagon maps to National Assessment page: 27 May 2004
COHA Status

This page shows the current status of the COHA project

Presentation
WRAP Data Analysis & Monitoring Activities Update

This was presented at the RPO National Technical Workshop in St. Louis on November 4-6, 2003.

Presentation
RPO Data Analysis/Monitoring Grant Guidance Review

Extracted from the EPA’s 3/5/02 RPO 4th Year Policy, Organizational & Technical Guidance. This was presented at the RPO National Technical Workshop in St. Louis on November 4-6, 2003.

Presentation
Presentation at the RPO National Technical Workgroup Meeting in St. Louis, MO

This was presented at the November 4-6, 2003 meeting. The presentation gave an update of the COHA project as of the beginning of November, 2003.

Presentation
COHA Presentation to the WRAP FEJF

The presentation describes the nature, purpose, and overall design of the COHA system and provides an update on the current status of ongoing tasks as of June, 2003. Recently released features are explored, and various ideas for future development are presented.

Page last updated 21 December 2004