The systems need a certain level of unsaturated dirt to work, but the dirt is disappearing
as the sea level is rising.
“With the sea level going up, the water table has risen up,” said Jason.
With a sewer system, he explains, water is whisked away to a water treatment plant.
With septic, the dirt around the tank filters out the contaminants. You flush your toilet, the waste fills a tank on property. Bacteria breaks it down. The heavier material falls to the bottom of the tank. Eventually, the effluent goes into underground pipes and gets released into the soil.
The higher water table is eating away at all that dirt.
“Everything floats downhill, if there’s no more downhill and you’re in the water, it’s just not going to work,” Jason explains. “So the systems, the older systems aren’t lasting as long.”
No soil means no filter, and no filter means contamination, Jennifer Cooper concluded in her 2016 study
“Hell and High Water: Diminished Septic System Performance in Coastal Regions Due to Climate Change.”
“The combination of sea level rise and the wetter conditions and warmer temperature is going to be a problem for these systems, for sure,” Cooper said.
Rachel Silverstein, the executive director for Miami Waterkeeper
, a nonprofit that fights to protect South Florida waters, eyes the area’s septic systems with real concern.
“Contamination is a real possibility,” said Silverstein. Broken septic systems mean when it floods people will be wading through waste that can make them sick.
If untreated sewage gets into area waters, it can create algae blooms
and other ecological problems
‘This is not a third-world country, this is Miami’
As he drives a golf cart from his tiny house real estate office to his lofted modern home, Marcelo Fernandes points to parts of his neighborhood road that flood.
Fernandes, a developer who sells homes in the area, says he has seen more floods due to high tides
, even on days with clear skies.
His neighborhood is on septic. He’s worried about the sewage that will be in those flood waters when these septic systems break. Studies show this is a real threat to human health
and to drinking water.
“When we are talking about flooding, we are talking about walking around in sewage, it’s bacterial infested sewage,” Fernandes says with disbelief. “This is not a third-world country, this is Miami. This shouldn’t happen.”
, the deputy director of the Miami-Dade Water and Sewer Department, says the county has been strategizing and working on the problem of sea level rise for about 30 years.
“This water management system is probably one of the most complex anywhere in the world,” explained Yoder. “We are in a place where the ocean is directly connected to our shallow groundwater system. As sea level rises, which it is clearly doing, it is going to affect our ability to both protect our drinking water supply and protect the built environment.”
The county report estimates it would take more than $3.3 billion to build the infrastructure to connect residential and businesses to the system and to support the additional service that will be needed from pumping systems and move properties to traditional sewer.
“It’s going to require even more than that, because you would also have to tear up the streets, and increase the capacity in our treatment system,” said Yoder.
For residents, replacing a septic system with sewer could cost between $15,000 to $50,000 out of pocket. It’s not an easy bill to pay for many residents and not an easy sell for politicians. Miami Waterkeeper’s Silverstein
worries the area isn’t ready to adapt.
“All of the rules and regulations aren’t there quite yet,” Silverstein said. “There’s still a lot of development and people are really just hoping for the best.”
‘How do we fix this?’
There are counties in the area that are already working to eliminate all their septic systems in the next decade. Martin County,
for example, has about 10,000 systems left to replace. The county is sharing the cost with residents.
New developments there have to be connected to sewer lines. That’s not the case in Miami-Dade County, where there are still new developments being built on septic. Miami-Dade County Commissioner Sosa
is introducing legislation to change that.
Sosa has serious concerns about how much this septic system problem will cost her constituents. She has worked with the governor to get funding. She also hopes to get more information to the public about the issue.
“How do we fix this? It’s not easy,” said Sosa.
Even if people have the money, if they live miles from closest sewer connection it may not even be possible to connect, Sosa said
, so the area will have to come up with alternatives, like elevating some systems.
“We have to act and we have to act with speed,” Sosa said. “But if we don’t get funding assistance it’s going to be impossible to do.”
Politically, Sosa said it may be hard to find the money for this, but, she said the county’s future depends on it.
“We don’t need people saying ‘We don’t go to Miami-Dade County, because look at the problems they have with the sewer system. Look at the contamination we have with the drinking water,’ ” Sosa said. “It’s of an incredible importance. The drinking water and the safety and health of the people, that has no price.”