Water, Water Everywhere:

There is a finite amount of water on Earth. The water that filled ancient oceans, nourished early civilizations, and sustained our ancestors is the very same water we consume, bathe in, and use to irrigate our crops today. A single drop of water makes many stops as it travels along the water cycle, moving from sky to soil, from pipe to person, and yes, even from toilet back to tap. While most of us rarely think about this continuous journey, understanding it is essential, especially in a place like Marco Island. 

All creatures on Earth require enough clean water to survive. Where does the story begin and end for Marco Island? Ours is a unique situation when it comes to our freshwater supply, and it is worth understanding how it all works.  As a limited resource, renewing and ensuring a reliable water supply requires awareness, planning, money, and time. 

We get our fresh water from Henderson Creek. The water is channeled to a reservoir on the east side of Collier Boulevard, just north of U.S. 41. During the rainy season, excess water is pumped into a deep well onsite, where it forms a freshwater “bubble” stored underground for later extraction and treatment during the dry season. Meanwhile, ongoing development along Collier Boulevard and upstream agricultural activity introduce potential concerns, as the creek is exposed to farm runoff and pollution before it ever reaches our system. 

We also draw brackish water from deep wells locally. Wellheads can be seen along San Marco Road between the high school and Goodland. Deep underground, roughly 1,000 feet below the surface, fresh water and salt water exist in a delicate balance. As we extract fresh water, saltwater pushes inland to fill the void. This water is treated using reverse osmosis, an effective but costly technology. Managing this water source is a constant challenge, requiring expensive filtration, maintenance, and, over time, the drilling of new wells. 

Between these two sources, Marco Island processes approximately 10 million gallons of water each day. More than 60% is used for irrigation - watering lawns, landscaping, and also filling swimming pools - while the remainder is used in homes for drinking, cooking, cleaning, and bathing. Once used, this water carries with it a complex mix of substances, including nutrients like nitrogen and phosphorus, as well as trace pharmaceutical compounds. In a community with a relatively older population, these pharmaceutical traces may be more prevalent, underscoring the importance of careful monitoring and treatment.   

From homes and hotels, wastewater travels to the sewage treatment plant. There, solids are removed and transported off-site. The remaining liquid is disinfected and repurposed as “reuse water,” used to irrigate our golf courses, parks, medians, large condominium complexes, and hotel properties both on and off the island, including nearby Hammock Bay.  As a “houseguest” of Nature, we borrow fresh water and return it dirty.  We put over 2 million gallons of this “reuse” water on our Marco Island land every single day; over fourteen billion gallons cumulatively since going to central sewage collection, and more coming. 

This reclaimed water continues its journey through underground systems, eventually making its way into canals or the Gulf. What began as drinking water does not simply disappear; it returns to the broader environment, where evaporation, condensation, and rainfall begin the cycle again.  

Given that we island dwellers are surrounded by water, it may seem abundant, but the reality is more sobering. The supply of clean, potable water is limited, and demand continues to rise. Every gallon we use is part of a closed loop, and every decision we make—how we irrigate, what we flush, what we allow to enter our waterways—affects the quality and availability of that water when it comes back to us. 

The takeaway is simple but crucial: on Marco Island, there is no “away.” The water we use today is the water that must nourish us tomorrow. Protecting it is not just an environmental responsibility; it is a direct investment in our own health, our community’s future, and the sustainability of life on this extraordinary island.