There's nothing quite like a golden Texas afternoon at the water's edge — your pup bounding into the shallows, tail spinning like a propeller, pure joy in canine form. Austin's lakes are a beloved part of our outdoor culture, but this summer, that idyllic scene comes with a serious caveat that every pet owner needs to know about.
Toxic blue-green algae — technically a cyanobacteria — has been detected in Austin-area lakes, and the threat it poses to our four-legged family members is not something to take lightly. Unlike the kind of algae that just looks a little gross, this variety produces toxins potent enough to cause liver failure and neurological damage in dogs, sometimes within hours of exposure. Tragically, even a small amount of contaminated water — licked from a wet coat, swallowed mid-swim — can be enough to make a healthy dog critically ill.
The blooms tend to thrive in warm, slow-moving water during the hottest months of the year, which means peak swimming season is also peak risk season. Visually, the algae can appear as a greenish or bluish-green scum floating on the surface, sometimes resembling spilled paint or pea soup — though blooms aren't always visible to the naked eye, which makes the danger feel even more unsettling.
City officials and wildlife health experts urge Austinites to check local water quality alerts before heading out, and to keep pets away from any water that looks discolored, murky, or has an unusual smell. If your dog does swim in a questionable area, rinse them off thoroughly with clean water immediately — and don't let them groom themselves before you do.
Signs of algae poisoning include vomiting, lethargy, seizures, and difficulty breathing. If you notice any of these symptoms after a lake outing, head to an emergency vet without delay. Time is genuinely of the essence.
Austin's outdoor life is one of the great gifts of living here — we just have to protect the ones who enjoy it most enthusiastically. A quick water quality check before you load up the truck could make all the difference this summer.