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City of Orlando extends LAKE ALERT for Lake Sue

Orlando seal

April 29, 2022 – Recent lab results from follow-up samples collected by the Florida Department of Environmental Protection from Lake Sue were determined to have potentially unsafe concentrations of toxins present. As a result, Lake Sue will be closely monitored by the City of Orlando, FDEP, Orange County and the City of Winter Park. The FDEP will collect samples for analysis at a future date (possibly 4-6 weeks) determined by the FDEP for Lake Sue and will provide updates on any possible detection of algae toxins as reported on the FDEP Algal Bloom Reporting dashboard ( Please continue to refrain from irrigating and recreating on the lake, including swimming, fishing and boating until further notice.

For additional information & questions

Previous notices:

April 8, 2022

UPDATED Information – A Lake Alert for Lake Sue was issued on March 4, 2022, due to a potentially unsafe concentration of toxins present in the lake. City of Orlando Stormwater staff have been continuously working with Florida Department of Environmental Protection, Orange County, and City of Winter Park since the Lake Alert was issued. This message is to provide an update on the status of the lake.

The results from the latest sampling event performed by Florida Department of Environmental staff on March 31, 2022, which can be found here: indicate there is still a trace amount of toxins present in the lake. Lake Sue will continue to be closely monitored by City of Orlando, FDEP, Orange County, and City of Winter Park staff. The Lake will be resampled in April, and, at that time, we will provide another update. At this time, the Lake Alert remains in effect until further notice.

Please continue to call the Lake Alert number, 407.246.2220, for the most up-to-date information regarding your lake. During weekdays, the City's Lake Alert website, will also have the latest information.

March 10, 2022

On February 24, 2022, the Florida Department of Environmental Protection (FDEP) tested water samples from Lake Sue and determined that potentially unsafe concentrations of toxins are present in the lake. Lake Sue is comprised of homeowners within Orange County, City of Winter Park, and City of Orlando jurisdictional boundaries. In this effort, all entities are advising citizens to refrain from swimming, recreating and irrigating in/ from Lake Sue until further notice.
Collectively, the community can make a positive impact on our water quality in the lakes. Stormwater collects pollutants before flowing into our lakes. Here are some things you can do to help: fertilizing properly, bagging yard waste, picking up your pets' waste, maintaining your septic system, and checking your vehicle for leaks.
Specifically for Lake Sue, the City of Orlando continues efforts to help minimize the negative impacts on the lake by street sweeping, collecting and analyzing water samples, and educating the public. The City of Winter Park surveys the lake, collects monthly water samples, and manages invasive aquatic vegetation. Orange County also performs street sweeping and analyzes the collected water samples from the City of Winter Park for nutrient chemistry, water clarity, bacteria, and field readings.
For reference, cyanobacteria/blue-green algae are always present in the water, however, not all bacteria have the ability to produce toxins. Toxicity is hard to predict because a single species of algae can have toxic and non-toxic strains. Nothing can be done to treat algae blooms without causing massive fish kills. In the coming weeks, the Florida Department of Environmental Protection (FDEP) will continue to sample Lake Sue. When additional information is received on the status of the lake from FDEP’s Algal Bloom Dashboard (, all alerts will be updated.
Please encourage your neighbors to register for the City of Orlando Lake Alert at and Orange County alerts at so they, too, will obtain important information about Lake Sue directly.
In the meantime, as stated above, the city and county would advise to refrain from swimming, recreating, and irrigating in/from the lake until further notice.