Developing Tools to Assess Airborne Cyanobacterial Toxins

Calusa Waterkeeper and Brain Chemistry Labs have announced the publication of a collaborative peer-reviewed research study in the international scientific journal Toxins.

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Taps Flow for H2O

Join us this August at Swamp Cat Brewery to celebrate Water Quality Awareness Month!

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Your Story Matters

We want to hear your observations about the natural history of where you live and play in the Caloosahatchee watershed, including the estuaries and islands the river feeds into.

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Now Hiring: Become the Calusa Waterkeeper

Help lead the fight for clean water in Southwest Florida as the voice, advocate, and public face of Calusa Waterkeeper.

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Fighting for Drinkable, Fishable, Swimmable Water

Volunteer Hours and Counting

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 state and national policies affecting our waters and quality of life.

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

Learn the Issues

Recent News

Calusa Waterkeeper and Brain Chemistry Labs Publish Peer-Reviewed Research on Airborne Harmful Algal Toxins

Jul 23, 2026

Calusa Waterkeeper and Brain Chemistry Labs have announced the publication of a collaborative peer-reviewed research study in the international scientific journal Toxins, documenting a new approach to monitoring airborne cyanobacterial toxins and advancing scientific understanding of airborne exposure associated with harmful algal blooms.

Cape Coral, FL development Seven Islands Raises Water Quality Concerns

Jul 20, 2026

The Seven Islands development in Cape Coral has broken ground, creating ripple effects throughout the community. Southwest Florida residents and environmental experts are questioning the development’s effect on water quality.

Florida bloom toxins turn up in air, suggesting inhalation risk beyond shorelines

Jul 18, 2026

Now partnering with the nonprofit Calusa Waterkeeper in Fort Myers, Florida, the Wyoming scientists announced that they have identified airborne cyanobacterial toxins collected in special detectors placed in different locations in Southwest Florida.

Labelle’s Massive Sewage Spill Capped Years of Wastewater Troubles

Jul 16, 2026

The city’s wastewater system has been plagued by line breaks, pump failures and blockages. The state found the city failed to maintain the required operations and maintenance manual for its collection system and failed to maintain an emergency response plan.

Major Sewage Spill Near LaBelle Prompts Environmental Concerns

Jul 11, 2026

A 450,000 gallon raw sewage spill near LaBelle is raising concerns about water quality, public health, and potential impacts to the Caloosahatchee River.

Calusa Waterkeeper Teams Up with Fort Myers Mighty Mussels for Community Night at the Ballpark

Jul 6, 2026

Calusa Waterkeeper invites the community to join them for a special evening at Hammond Stadium on Saturday, July 18, 2026, as the Fort Myers Mighty Mussels take on the Lakeland Flying Tigers.

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