Coastal properties are prized for their location — but that same location creates unique, hidden environmental risks beneath the surface. And those risks are growing.
A 2024 scientific review published in Nature Reviews Earth & Environment warns that coastal groundwater systems worldwide are facing increased vulnerability due to climate change, sea-level rise, and human land use. These factors interact in ways that accelerate contamination, salinization, and infrastructure damage — especially in low-lying coastlines like South Florida’s.
For anyone acquiring, refinancing, or redeveloping commercial property, this means one thing:
Environmental testing isn’t just a due-diligence box to check. It’s a long-term protection strategy for your investment.
RISING SEAS, RISING RISKS: WHAT THE SCIENCE SHOWS
1. SALTWATER INTRUSION IS ACCELERATING WORLDWIDE
The review identifies saltwater intrusion (SWI) as the most studied threat to coastal groundwater. At least 500 coastal cities already report SWI issues, driven by sea-level rise, storm surges, and increased human extraction of freshwater.
As saltwater moves inland, it contaminates shallow aquifers — often the very aquifers commercial properties rely on for irrigation, filtration systems, or nearby drinking-water supplies.
This is especially relevant across South Florida, where flat topography and porous limestone allow saltwater to migrate quickly.
2. STORM SURGES CAN CONTAMINATE GROUNDWATER FOR YEARS
The study documents events where flooding from major storms pushed seawater deep into aquifers, aided by damaged or poorly sealed wells. In some regions, the contamination took years to dissipate.
In coastal areas prone to hurricanes — including Miami-Dade, Broward, and Palm Beach — this means that even a site that appears “clean” today may be dealing with legacy impacts from past storm events.
Accurate groundwater sampling during a Phase II ESA is the only way to catch these delayed contamination signatures.
3. HUMAN ACTIVITY MAKES CONTAMINATION WORSE
The review highlights that more than 12% of U.S. coastal aquifers are vulnerable to contamination from land use — including fertilizers, industrial runoff, and historical dumping.
For properties with long operational histories, redevelopment plans, or unknown past uses, this introduces significant risk.
A strong Phase I ESA, including regulatory database review and historical records, is crucial for identifying potential Recognized Environmental Conditions (RECs) tied to past land use.
4. CLIMATE STRESSORS “STACK” WITH HUMAN ONES
Perhaps the most important insight from the research is how climate pressures (like sea-level rise or extreme rain) interact with human stressors (such as groundwater pumping and land development).
This interaction speeds up contamination processes and increases their severity.
Coastal property risks are no longer isolated — they compound.
For buyers, lenders, and developers, this makes comprehensive environmental due diligence more important than ever.
SOUTH FLORIDA NEEDS INNOVATIVE, SCIENCE-DRIVEN ENVIRONMENTAL TESTING
The 2024 study makes one thing clear:
Coastal groundwater systems are changing — and environmental due diligence must keep pace.
For property buyers, investors, lenders, and developers, this means relying on environmental assessments that are not only compliant, but future-focused.
At Full Spectrum Environmental, we conduct Phase I, II, and III ESAs with careful attention to the unique environmental factors found across South Florida’s coastal properties.
READY TO PROTECT YOUR INVESTMENT?
Request a consultation or ESA proposal today.
Your property’s future starts with understanding what’s beneath the surface.