The city has a message for homeowners: "Bag it, don't blow it."
The City of Orlando Streets and Storm Water Division is sending postcards to residents reminding them not to let leaves get into the sewer system.
"They need to bag their yard waste rather than blow it into the street. Another option is they can compost it or leave it on their yard to naturally break down," said public awareness specialist Clary Powell.
The goal is to prevent flooding and keep pollutants from flowing into Orlando's many lakes.
"Leaves are also excess nutrients. Excess nutrients can cause algae blooms and harm water quality," Powell explained.
The postcards encourage residents to keep an eye their neighbors and call a hotline if they notice people allowing waste into the sewers.
Powell said city officials will start with a warning, but repeated offenses could warrant a fine of up to $1,000.
For more information or to report pollutants residents can call 407-246-2370.