Mar 25: Coffee with the Casco Baykeeper: The PFAS Results are In!
Learn what recent PFAS testing tells us about Casco Bay—from Brunswick results to fish and shellfish samples—and how this science can help guide future action.
Improving and protecting the environmental health of Casco Bay
Please update your records with our new address.
75 West Commercial Street, Suite 301
Portland, ME 04101
Portland, ME 04101
Friends of Casco Bay improves and protects the environmental health of Casco Bay. As home to the Casco BAYKEEPER® we act as the eyes, ears, and voice of the Bay.
We use an integrated approach to tackle the largest threats to the health of our coastal waters,
meeting our mission through science, advocacy, and community engagement. We track the health
of the Bay, advocate to reduce pollution and increase climate resiliency, and engage the public in
our efforts to improve and protect Casco Bay.
How You Can Help
Upcoming Events
Apr 11: Expired Marine Flares Disposal Day
Got expired or used marine flares? Dispose of them properly with the help of the Maine State Fire Marshal.
Our Blog
Watch: Coffee with the Casco Baykeeper: Our 2025 Science Report
March 6, 2026
Dive into the data with our team as we explore warming waters, eelgrass, and Dive into the data with our team as we explore warming waters, eelgrass, and what the data tells us about the Bay’s changing conditions.
An Optimist
February 23, 2026
How can someone who works in climate science stay hopeful? That’s the question at the heart of a short documentary featuring Staff Scientist Mike Doan.
A Love Letter from Casco Bay
February 14, 2026
A love letter from Casco Bay to the watershed that sustains it.
Coffee with the Casco Baykeeper: Indigenous Relationships with Water
February 12, 2026
Watch the video: Casco Baykeeper Ivy Frignoca and guest Keyana Pardilla explore Indigenous ways of relating to water and what responsibility and reciprocity can look like for Casco Bay.
Our Work
Science
We “listen” to Casco Bay by collecting water quality data, enabling us to identify threats to the health of the Bay. We track water quality year-round from our three Continuous Monitoring Stations, and collect seasonal water samples around the Bay.
Advocacy
Advocating for clean marine water is at the core of our work. Led by our chief advocate, the Casco Baykeeper, our staff and community lend the Bay our voices. We advocate for the health of our coastal waters in town halls and the state legislature, and work with businesses and environmental agencies to promote clean water policies and practices.
Get Involved
The name Friends of Casco Bay was chosen with purposeful intent. It takes a community to care for the Bay. We host events to educate the public on issues affecting the Bay and coordinate volunteer efforts to improve its health. We are proud to say that our volunteers and supporters are among the Bay’s most dedicated ambassadors.
We’re proud members of
