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Aquatic Toxins in Florida

Contact: Florida Health

Man in water working on cleaning up algaeFlorida’s waterways are an important part of the state’s environment and economy, but they can be affected by toxins released during harmful algal blooms (HABs). The Florida Department of Health explains the nature of these toxins, their potential impacts on public health and the environment, and offers safety recommendations.

What You Need to Know to Stay Safe in Florida:

  • What Are Aquatic Toxins?
  • Health and Environmental Hazards
  • Staying Safe & Informed
  • Additional Resources

Aquatic toxins are chemicals produced by certain algae and microorganisms during bloom events. In Florida, these blooms are most associated with:

  • Red Tide: Caused by the alga Karenia brevis, red tide produces  brevotoxins that may irritate the respiratory system and affect marine life.
  • Blue-Green Algae (Cyanobacteria): These freshwater blooms can produce toxins that pose risks to humans, pets, and wildlife when ingested or when there is skin contact.

Aquatic toxins can cause respiratory issues, skin irritation, and gastrointestinal problems, while also harming marine life and degrading water quality.

  • Health risks: Breathing airborne toxins can cause respiratory irritation, especially for individuals with asthma or allergies. Skin contact with affected water may cause rashes, and consuming contaminated seafood can lead to gastrointestinal issues.
  • Environmental impact: Aquatic toxins can cause fish kills, degrade water quality and disrupt marine ecosystems, leading to economic and ecological challenges.

Stay informed with updates from trusted sources like the Florida Department of Environmental Protection and NOAA, avoid affected waters, and follow health advisories to stay safe during harmful algal blooms.

  • Stay Informed: Monitor updates from agencies such as the Florida Department of Environmental Protection and NOAA’s Harmful Algal Bloom Forecasts.
  • Avoid Affected Areas: Refrain from swimming, fishing, or boating in waters that show visible blooms or emit strong odors. Keep pets and children away from these areas.
  • Follow Health Advisories: Observe guidelines related to seafood consumption and water contact during bloom events.

For more detailed information about aquatic toxins and their impacts on Florida’s waterways, visit the following resources:


Protecting Florida’s Waterways

Florida’s waterways are essential to the state’s environment and economy and protecting them requires collective action. Staying informed about harmful algal blooms, recognizing health risks and following safety advisories help safeguard public health and marine ecosystems. By adopting responsible practices and using trusted resources, individuals can help preserve Florida’s water quality and ensure these natural treasures remain accessible for future generations.

Note: The links and content provided on this page are for your convenience and informational purposes. The Florida Department of Health (DOH) doesn't endorse or approve any products, services, or opinions. We're not responsible for the content or accuracy of external sites. If you have questions, please reach out to the external site directly.