estero bay

Public Video Premieres

Calusa Waterkeeper’s first two exclusive documentaries on water quality in Southwest Florida are now available to the public for free!

estero bay

Billy's Creek Action Plan

Learn more about our Billy’s Creek Community Action Plan to address fecal indicator bacteria in this historic Fort Myers neighborhood.

Make a Donation

Join the Movement


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.

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.

Vicky C.
Cape Coral

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!

Stephen B.

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

Jensen’s Marina

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.

Denny S.
Fort Myers

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

Gerri R.
Fort Myers

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

Mark D.
North Fort Myers

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

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

How Much Dangerous Algae Toxin is in the Air?

How Much Dangerous Algae Toxin is in the Air?

Calusa Waterkeeper is checking the air for cyanotoxins, produced by microscopic organisms that photosynthesize as plants do, but are indeed bacteria, even though they’re commonly called blue-green algae. Some produce potent toxins that have been linked to grave health problems.

Words from the Waterkeeper, Episode 29

Words from the Waterkeeper, Episode 29

This week’s updates from John include water quality in Matlacha Pass, info on CDC study, and an event this Saturday, July 3rd at 2 pm, at Unitarian Universalist Church to support Right to Clean Water.

Guest Opinion: Will LOSOM Get the Water Right?

Guest Opinion: Will LOSOM Get the Water Right?

If you are wondering what the next Lake Okeechobee water release schedule will bring, you are not alone. The Lake schedule, being revised by the U.S. Army Corps of Engineers (ACOE), will be called the Lake Okeechobee System Operating Manual (LOSOM).

Get Notified

Sustaining Donors

CHNEP New Logo 2020

View ALL sponsors

Become a Sponsor