Who We Are

Calusa Waterkeeper is guided by science to protect our water quality and human health. We fill a unique niche in Southwest Florida and would value your support!

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Waterborne Film

Our latest documentary, Waterborne is now available to watch for free!

View Documentary for Free

Fighting for Drinkable, Fishable, Swimmable Water

Since 1995

Calusa Waterkeeper is a non-profit organization dedicated to the protection of the Caloosahatchee River & Estuary in Southwest Florida. This includes Lake Okeechobee & Estero Bay, plus the near-shore waterways of Lee County. We strive to achieve this mission through education and promotion of responsible use and enjoyment by all people.

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Thank you for all that you’re doing to improve our water quality and to educate us on changes we ourselves can make to help.

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Vicky C.
Cape Coral

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I have come to value the work of the Calusa Waterkeeper and its important voice in our community advocating for cleaner water. Keep up with the good work!

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Stephen B.
Clewiston

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We appreciate all that you do for our community and water quality. Great Job! Thank you, The Jensens.

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Jensen’s Marina
Captiva

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Thank you Calusa Waterkeeper and John Cassani for all you do to educate the public about the water quality crisis we are facing in SWFL.

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Denny S.
Fort Myers

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Thanks to CWK for relentlessly using science and public outreach to fight for clean water in SW Florida! We all benefit.

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Gerri R.
Fort Myers

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I have learned so much as a volunteer Ranger with Calusa Waterkeeper. Excited to continue!

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Mark D.
North Fort Myers

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Happy to renew our membership and keep you on the front lines. Thank you for all you do.

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Scott & Christine M.
Cape Coral

Explore the Issues

Waterways around the world are under attack by pollution and mismanagement. Southwest Florida is no different.

Calusa Waterkeeper is focused on several local action items as well as regional and national issues affecting our water policy and quality of lives.

We think you’ll agree, these are causes worth fighting for.

Learn the Issues

Recent News

Matlacha Pass Water Quality Observations – May 2022

May 13, 2022

Calusa Waterkeeper Ranger, Sue Dahod lends her time and educational background to keep an eye on water conditions throughout Matlacha Pass from both Pine Island and the shores of Matlacha. Calusa Waterkeeper brings you these updates from her observations.

Initial SWFL Study Finds Water & Air Pollutants could cause grave Brain Disease

May 2, 2022

A first-of-its-kind field study of Southwest Florida air and water didn’t find widespread cyanobacteria toxins however, it did find several neurotoxins as well as three forms of BMAA, a neurotoxin linked to grave brain diseases.

Collaborative Research on Airborne Toxins from Harmful Algal Blooms in Southwest Florida

May 2, 2022

Calusa Waterkeeper and Wyoming-based Brain Chemistry Labs collaborate on a groundbreaking device to research airborne toxins from harmful algal blooms utilizing the most sensitive technology available for detecting harmful algal bloom (HAB) toxins,

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