Residents in Austin are being urged to use caution around local waterways due to the presence of blue-green algae mats, which may be toxic. The City of Austin has observed these algae in lakes and creeks during the winter, with expectations that they will become more common as spring approaches.
The algae typically appear as dark blobs on the water’s surface and can be mixed with other types of algae. The City recommends assessing water conditions before entering with pets or children by looking for algae along shorelines, avoiding stagnant or murky water, and staying out if there is visible scum or if it has rained within the past three days. These signs may indicate poor water quality.
After contact with natural water bodies, people are advised not to drink the water directly, avoid touching algae, rinse skin or animal fur thoroughly, and prevent dogs from licking their fur before rinsing. Anyone experiencing sudden illness after swimming should seek medical attention promptly. The City encourages reporting suspected human or animal illnesses related to algae through its online form.
“There is always some level of risk when spending time on Austin’s waterways. Natural water bodies can contain algae, bacteria, parasites, and other hazards. Austin Watershed Protection monitors the water quality in our lakes and creeks in order to understand how the urban environment affects our water bodies and to develop effective policies to protect them. We do not regularly test water in our creeks and lakes for recreational use,” according to a statement from city officials.
The Austin Watershed Protection Department manages 850 miles of creeks, 1,100 miles of storm drains, 30,000 inlets, 1,000 stormwater ponds, 140 acres of open space, and 45 rain gardens throughout the city. It also investigates over 2,100 creek erosion sites and employs 443 staff members who work on environmental programs aimed at reducing flooding and pollution impacts across Austin.
The department works to safeguard lives, property, and the environment by addressing issues such as flooding, erosion, and pollution through various community initiatives. For more information about its services or how it protects local waterways visit the official website.
“Austin Watershed Protection protects lives, property and the environment of our community by reducing the impact of flooding, erosion, and water pollution. Visit AustinTexas.gov/Watershed to learn more.”

