At a glance
Watch and share this video. It shows how to keep yourself and your pets safe from harmful algal blooms when visiting lakes, rivers, and other bodies of water.
Video transcript
Did you know that going in or near water with a harmful algal bloom can make you, your family, and your pets sick?
Harmful algal blooms are caused by the fast growth of algae or cyanobacteria, also called blue-green algae. They are more likely to grow when water is warm and slow moving.
Harmful algal blooms grow in bodies of water throughout the United States. They are happening more often in part due to rising temperatures.
Take these steps to avoid getting sick.
Before visiting the water, check for and follow swimming or fishing advisories. Look online or near the water for advisories from your local government.
Not all bodies of water are monitored for harmful algal blooms. Stay out of the water if it looks discolored, scummy, dirty, or smells bad.
If you have contact with a harmful algal bloom, you may get stomach pain, a rash, a headache, throw up, or have other symptoms. People often have mild or moderate symptoms, but sometimes require medical care. Your pet may throw up, be very tired, or show other signs that they are sick.
Call a doctor or poison control at 1-800-222-1222 if you get sick after going in or near water. They can give you advice about how to feel better. For a sick pet, call a veterinarian right away. Dogs can get very sick and die within hours of drinking or going in water with a harmful algal bloom.
Don't let harmful algal blooms spoil your splash. Stay out of the water if it is scummy, stinky, or discolored. Visit cdc.gov/habs for more information.