Florida’s C-43 Reservoir—one of the largest water infrastructure projects in the state’s history—is on track for early completion this summer, according to Gov. Ron DeSantis. The $1-billion reservoir, located west of Lake Okeechobee, is designed to store and treat up to 55 billion gallons of runoff, helping to regulate salinity in the Caloosahatchee River and protect downstream ecosystems.
Operated by the South Florida Water Management District, the reservoir is expected to serve over 500,000 residents while curbing nutrient loads that fuel harmful algal blooms, which cost Florida an estimated $200 million in 2024 alone.
Why it matters for business:
-
The project safeguards Florida’s $5 billion fishing and tourism economy, long threatened by red tides and algae outbreaks.
-
Engineering and monitoring contracts tied to the C-43 buildout have already topped $200 million, with firms like CDM Smith involved—part of a $50 billion U.S. water storage market growing at 6% annually.
-
Local utilities may face 2–3% rate increases as O&M responsibilities shift from construction to long-term performance.
Big picture:
As the U.S. South ramps up investment in watershed-scale infrastructure, the C-43 is emerging as a model for multipurpose storage—offering both ecosystem restoration and supply stability.
With 50% of Southern states facing serious water quality challenges, projects like this are no longer optional. It will be a major challenge to get out ahead of the complex investments of time and capital required.
By the numbers:
-
55 billion gallons of capacity
-
100 MGD treatment volume
-
$1B total project cost, with $400M in state funds
-
50% projected reduction in Caloosahatchee algae blooms
-
$30M in upcoming monitoring tech contracts
What’s next:
Operations are expected to begin by August 2025. Stakeholders should watch for state budget updates and RFPs for long-term monitoring systems. Environmental groups and ag interests alike are calling for field assessments of water quality gains ahead of the 2026 wet season.
