Austin is experiencing its annual encounter with toxic cyanobacteria, commonly referred to as blue-green algae, which has reemerged in local lakes and waterways following the colder months. This phenomenon has become a concerning hallmark of spring in the city.
The Watershed Protection Department of Austin has reported the presence of thick mats of this harmful bacteria near Red Bud Isle on Lady Bird Lake and Walsh Boat Landing on Lake Austin. These mats rise from the depths, forming a dark greenish layer on the water’s surface, characterized by a slimy texture reminiscent of vomit. This algae poses a risk to both humans and animals, often intertwining with other aquatic vegetation.
In a recent statement, the Watershed Protection Department advised the public to steer clear of any contact with the algae, as well as to avoid stagnant, warm, or murky waters, particularly those exhibiting a scum or surface film.
The toxic blue-green algae has been identified again at Red Bud Isle, with past incidents linked to the deaths of several dogs and the closure of popular swimming areas throughout Austin. This algae first made its appearance in local waters in 2019, following severe flooding upstream that introduced significant amounts of storm runoff containing fertilizers and septic waste into the lakes.
The city has issued a warning for individuals and pets, advising that anyone experiencing sudden and unexplained illness after swimming should seek medical attention promptly. The algae thrives in warm waters and tends to proliferate as temperatures rise.
Austin Public Health is encouraging residents to report any cases of illness in humans or pets potentially related to algae exposure via an online form. Meanwhile, the Watershed Protection Department has sent six samples collected from local lakes to laboratories for further analysis.
For additional information on how to safeguard yourself and your pets from the risks associated with blue-green algae, residents can access further resources provided by the city.
