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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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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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

Warning signs missed before massive Labelle sewage spill found

Aug 12, 2026

A month after a mowing tractor sent an estimated 450,000 gallons of sewage flowing toward the Caloosahatchee in LaBelle, the sequence of events has come into sharper focus.

Communities wrestle with hyperscale projects targeting Florida

Aug 12, 2026

Government officials aren’t alone in grappling with data centers. Environmental advocacy groups are also troubled by the potential effects.

Researchers develop tools to test for airborne blue-green algae toxins in Southwest Florida

Jul 29, 2026

The data shows that while very few large-scale cyanobacterial bloom events were observed at sampling locations across Southwest Florida, cyanobacterial and algal toxins were present in low concentrations in the majority of samples.

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.

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