Studies supported by CBEP have attempted to determine the extent to which toxics are being contributed to the Bay via atmospheric deposition:

• Is Atmospheric Deposition a Major Contributor of PAHs and Mercury to the Bay? (PDF)
• Deposition of Air Pollutants to Casco Bay, Sonoma Technology, Inc. Report, 6/03 (PDF)
• Estimating Estuarine Pollutant Loading From Atmospheric Deposition Using Casco Bay, 5/03 (PDF)
• Slideshow presentation of the results from the Casco Bay Estuary Project air deposition monitoring in Freeport