The 12th U.S. Symposium on Harmful Algae will be held on October 27-November 1, 2024 at Holiday Inn Portland by the Bay in Portland, Maine.

Logo by Hannah Bonner, Utah Department of Environmental Quality

ONE BLOOM: Unifying HAB Science in Aquatic Ecosystems

The theme, ONE BLOOM, seeks to identify and highlight commonalities across diverse study systems and disciplines within Harmful Algal Bloom (HAB) research. Sessions and discussions will foster a unified understanding that integrates perspectives and approaches in HAB science, and equips researchers, managers, and policymakers with the knowledge needed to address this pressing environmental challenge.

The symposium is open to all registrants. Attendees include national representatives and researchers from academia; state, federal, tribal, and municipal governments; the private sector; and watershed organizations.

Logo Contest

Congratulations to Hannah Bonner, Environmental Scientist at Utah Department of Environmental Quality, for submitting the winning symposium logo!

Call for Abstracts

The Call for Abstracts is Now Open!

Please submit your abstracts by May 8 (12:00 midnight PST).

Encouraged submission topics for presentations and posters include:

  • Applications of Emerging Technologies
  • Benthic HABs
  • Biochemistry & Ecophysiology
  • Biotoxins & Impacts on Organisms (Fish, Shellfish, Wildlife, & Domestic Animals)
  • Bloom Dynamics & Drivers
  • Cellular & Molecular Technology
  • Climate Change & Resiliency
  • Data Portals, GIS, & Remote Sensing Applications
  • Emerging Toxins & Species
  • Engaging Communities & Stakeholders
  • Environmental Justice & Socioeconomic Impacts
  • Food Web Dynamics & Ecosystem Function
  • HAB Trends Using Current and Paleo Techniques
  • HABs Across the Freshwater-to-Marine Continuum
  • Management, Mitigation, & Control
  • Method Validation & Reference Materials
  • Microbial Interactions
  • Multi-Stressor Research Studies
  • Non-Toxic Bloom Events (Noxious Blooms, Macroalgae)
  • Nutrients & Biogeochemistry
  • Predictive Models & Forecasting
  • Public Health & Risk Management
  • Taxonomy & Molecular Systematics
  • Toxin Biosynthesis, Pathways, & Effects

Proposals for Training Sessions or Workshops are also welcomed.

We anticipate that you will be notified about the status of your abstract in June 2024.

Meet the Scientific Steering Committee

  • Maryann Dugan, NEIWPCC
  • Devon Case, NEIWPCC
  • Holly Bowers, Moss Landing Marine Labs
  • Dail Laughinghouse, University of Florida / IFAS
  • Don Anderson, Woods Hole Oceanographic Institution
  • Keith Bouma-Gregson, U.S. Geological Survey
  • Michael Brosnahan, Woods Hole Oceanographic Institution
  • Jonathan Deeds, U.S. Food and Drug Administration (FDA)
  • Jennifer Graham, U.S. Geological Survey
  • Matthew Gribble, Emory University
  • Valerie Paul, Smithsonian Marine Station at Fort Pierce
  • Michael Paul, US EPA
  • Misty Peacock, Salish Sea Research Center
  • Sarah Pease, NOAA/NCCOS
  • Ellen Preece, Robertson-Bryan, Inc.
  • Heather Raymond, Ohio State University
  • Mindy Richlen, Woods Hole Oceanographic Institution
  • Jayme Smith, Southern California Coastal Water Research Project Biogeochemistry Department
  • Morgan Steffen, James Madison University
  • Marc Suddleson, NOAA/NCCOS

Travel Supplements

Travel supplements will be offered to graduate students, postdocs, and resource managers through support from the National Office on Harmful Algal Blooms. Please check our website for updates when this opportunity will be released.


For general questions or information about the 12th U.S. Symposium on Harmful Algae, please contact Maryann Dugan and Devon Case at

Conference Archives

To view select information from the 11th U.S. Symposium on Harmful Algae agenda, visit the Conference Proceedings page.

COVID-19 Policy

NEIWPCC is committed to providing an event environment that keeps all participants as safe as possible and promotes the well-being of our community. It is recommended that all individuals who participate in NEIWPCC events be fully vaccinated, however, this is no longer a requirement to attend.

We encourage attendees to take CDC recommendations and their individual circumstances into account when making a decision about preventative actions. By voluntarily choosing to attend NEIWPCC events, participants assume all risks associated with exposure to COVID-19.

Attendees should NOT participate in NEIWPCC events if they display any symptoms of COVID-19. Anyone who has tested positive for COVID-19 within ten (10) days of the event must test negative prior to attending.