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Pollution from Hurricane Ian may linger for months

Red tide and pathogens found in waterbodies

Debris is piled up at the end of a cove following heavy winds and storm surge caused by Hurricane Ian, Sept. 29, 2022, in Barefoot Beach, Fla. Florida has seen an increase in cases of flesh-eating bacteria this year driven largely by a surge in the county hit hardest by Hurricane Ian. The state Department of Health reports that as of Friday there have been 65 cases of vibrio vulnificus infections and 11 deaths in Florida this year. That compares to 34 cases and 10 deaths reported during all of 2021. (AP Photo/Marta Lavandier) (Marta Lavandier, Copyright 2022 The Associated Press. All Rights Reserved.)

On top of the damage and lost lives left behind from Hurricane Ian, Florida may be dealing with pollution for months.

The hurricane dumped raw sewage into waterways and is being blamed for bacterial infections.

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In the weeks following the storm’s inundation, millions of gallons of spills were reported around the state from overflowing wastewater.

Areas far from landfall were hit with nearly two feet of rain causing higher volumes of inflow into sanitary sewers.  At Orlando’s Iron Bridge Water Reclamation Facility, floodwaters, heavy inflow and high groundwater levels caused severe loading on the plant with an estimated 73,900,000 gallons escaping the system.

Sewage flowing over at Orlando's wastewater treatment plant. (City of Orlando)

Power outages backed up sewers. Getting wastewater from homes to treatment facilities requires electricity to run lift stations that pump wastewater from about 10 feet deep up to cleaning plants.

Along the Gulf coast, contaminated water in sewer stations unloaded harmful bacteria and viruses into the waterways and scientists say it could take months before the tides flush out the pollution.

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Marine biologists collected water samples at numerous locations along the Gulf with dangerous bacteria that could cause human infections. Some levels of E. coli attributed to feces are six to ten times above DEP limits.

Too many nutrients in the water can drop oxygen levels to the point that fish have a difficult time surviving. It may also make red tides more severe.

The most recent red tide bloomed recently offshore southwest Florida in the wake of the hurricane. Red tide offshore of Sarasota Lee and Charlotte County all have high concentrations.

Latest red tide report.

The connection between red tide and hurricanes is not overly clear but scientists say the natural red tide phenomenon could be exacerbated by nutrient pollution from human activity.

The University of Florida and the Sanibel-Captiva Conservation Foundation have been assessing water quality impacts along the coast. They plan on collecting samples in November and through April 2023 thanks to grants from the EPA and the Corps.


About the Author
Mark Collins headshot

After covering the weather from every corner of Florida and doing marine research in the Gulf, Mark Collins settled in Jacksonville to forecast weather for The First Coast.

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