Working with you
to keep Casco Bay blue.

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Friends of Casco Bay’s mission is to improve and protect the environmental health of Casco Bay. 


Our areas of work are:


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 from 24 locations around the Bay. 


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

Community Engagement

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.


Get to know us. Read our stories.

Decades of Data: A Watershed Year for Science

September 8, 2022

This year we are marking two important milestones: our 30th season of monitoring the water quality of Casco Bay and the first full-year of having… Read more

Algal Blooms and Softshell Clam Mortalities Reported in Eastern Casco Bay

August 16, 2022

Water Reporter Glenn Michaels captured this close-up image of an algal bloom near his home on Maquoit Bay (Freeport/Brunswick). Glenn first notified Friends of Casco… Read more

Casco Bay’s years-long fight against pollution buoyed by new stormwater rules

July 12, 2022

The Clean Water Act had a transformative effect on the watershed after it was first passed. With new state permitting regulations, it can again. Exclusive… Read more


Friends of Casco Bay’s Successes



How you can help:


Photograph by Kevin Morris


Photograph by Dave Dostie

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Cover photo: Photograph by Kevin Morris