Algal blooms can occur when warm water and nutrients combine to make conditions favorable for algae growth. Most algae species are harmless. However, some species may produce irritating compounds or toxins.
Some harmful algae, called cyanobacteria, can cause skin rash and gastrointestinal illnesses, such as upset stomach, nausea, vomiting and diarrhea. Avoid discolored water or scum that is green or bluish-green because it could contain toxins.
To prevent illness, people should:
- Avoid contact with any area of the water that is green or an advisory sign is posted. WHEN IN DOUBT, STAY OUT!
- Do not allow children or pets to drink from natural bodies of water.
- Keep children and pets out of the areas experiencing a harmful algal bloom.
- Quickly wash exposed skin and/or wash your pets off with plenty of fresh, clean water after coming into contact with algae scum or water with algal blooms.
- Seek medical/veterinarian care if you or your animals experience symptoms after swimming in or near an algal bloom.
- Properly clean fish by removing skin and discarding all internal organs and cooking fish to the proper temperature to ensure fish fillets are safe to eat.
- Contact the Harmful Algal Bloom Hotline at 1-888-238-6154 if you suspect you experienced health-related effects following exposure to a harmful algal bloom.
Visit www.SwimHealthyVA.com to learn more about harmful algal blooms or how to report an algae bloom or fish kill.