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  2. Harmful Algal Blooms (HABs) in Water Bodies

Managing HABs

HABs are a serious threat to drinking and recreational uses in surface waters. HABs, particularly those caused by blue-green algae and their cyanotoxins, can pose risks to humans, wildlife, and pets. As a result, effective HAB management requires, a multi-prong approach that incorporates prevention, proactive planning, active management, and effective risk communication. EPA has developed and facilitated access to methods to monitor, assess, and treat the presence of cyanobacterial cells and their toxins in freshwaters. To support the role of recreational waterbody managers and public water systems in preventing; controlling, treating and/or removing toxins, and communicating risks to users, EPA has developed and facilitated access to a variety of management planning resources.

  • Managing HABs in Surface Water
  • Managing Algal Toxins in Drinking Water
  • Managing Algal Toxins in Recreational Waters

Harmful Algal Blooms (HABs) in Water Bodies

  • Basic Information on HABs
    • Learn about HABs
    • What Causes HABs
    • Exposure to HABs
    • Effects of HABs
    • What You Can Do
  • Trends, Monitoring Results & Forecasts
    • HAB Monitoring and Trends
    • HAB Forecasts
    • HAB Advisories
  • Managing HABs
    • Managing HABs in Surface Water
    • Managing Algal Toxins in Drinking Water
    • Managing Algal Toxins in Recreational Waters
  • HAB Laws, Tools and Data
    • HABHRCA
    • HAB Tools
    • HAB Data
  • HAB Methods & Research
    • HAB Methods
    • HAB Research
  • HAB Resources
    • EPA Outreach on HABs
    • Labs that Analyze for Cyanobacteria and Cyanotoxins
    • State & Tribal HAB Programs and Resources
    • State & Tribal Toxin Thresholds and Assessment Methods
    • HAB Resources from Other Federal Agencies and Organizations
    • Recent Papers, Upcoming Meetings and Webinars
Contact Us about HABs
Contact Us to ask a question, provide feedback, or report a problem.
Last updated on February 24, 2025
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