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1. Home
2. Hazards
3. Harmful Algal Blooms
4. Great Lakes

**Great Lakes: Harmful Algal Blooms**  an image of 2017 harmful algal bloom in Lake Erie A satellite view of a 2017 harmful algal bloom in Lake Erie. Credit: NASA Earth Observatory Cyanobacteria blooms (blue-green algae) are a frequent occurrence in the Great Lakes, particularly in Lake Erie, Green Bay, and Saginaw Bay. These blooms may cause fish kills and discolored or foul-smelling water, affecting both human and ecosystem health. NOAA provides forecasts of cyanobacteria blooms for Lake Erie from July to October. Some cyanobacteria blooms can grow rapidly and produce toxins that cause harm to animal life and humans, so scientists describe them as harmful algal blooms (HABs).  NOAA Resources Lake Erie Harmful Algal Bloom Forecast
				NOAA’s Harmful Algal Bloom Bulletins are issued twice weekly during blooms of blue-green algae in Lake Erie. Harmful Algal Bloom Monitoring System: Near Real-Time Imagery
				NOAA's National Centers for Coastal Ocean Science developed this site to routinely deliver near real-time products for use in locating, monitoring, and quantifying algal blooms in coastal and lake regions of the U.S. This application delivers a suite of bloom detection products in the form of geographic-based images. Great Lakes Harmful Algal Blooms and Hypoxia
				HAB and hypoxia resources, forecasts, and water quality monitoring from NOAA’s Great Lakes Environmental Research Laboratory. Frequently Asked Questions
				Frequently asked questions about harmful algal blooms and Great Lakes blooms of blue-green algae. Michigan Sea Grant: Harmful Algal Blooms
				Michigan Sea Grant projects, news, products, data, and general information related to harmful algal blooms. New York Sea Grant: Harmful Algal Blooms
				New York Sea Grant projects, news, products, data, and general information related to harmful algal blooms. Ohio Sea Grant: Harmful Algal Blooms
				Ohio Sea Grant projects, news, products, data, and general information related to harmful algal blooms. NOAA awards $18.9M for harmful algal bloom research, monitoring 
                NOAA is announcing $18.9 million in funding for harmful algal bloom (HAB) research projects and monitoring activities throughout U.S. coastal and Great Lakes waters. Illinois Resources Harmful Algal Blooms
				HAB resources from the Illinois Department of Public Health. Blue-Green Algae and Harmful Algal Blooms
				Resources from the Illinois Environmental Protection Agency. Indiana Resources Harmful Algal Blooms
				General information, testing sites, and other resources from the Indiana State Department of Health. Michigan Resources Harmful ALgal Bloom Resources
				HAB resources from Michigan's Department of Environmental Quality. Minnesota Resources Blue-Green Algae and Harmful Algal Blooms
				Frequently asked questions and health information from the Minnesota Pollution Control Agency. Harmful Algal Blooms
				Frequently asked questions, health information, and resources from the Minnesota's Department of Health. New York Resources Harmful Algal Bloom Notifications
				HAB resources from New York's Department of Environmental Conservation. Ohio Resources Lake Erie Harmful Algal Bloom Resources
				HAB resources and links from Ohio's Environmental Protection Agency. Lake Erie Recreational and Beach Monitoring Data
				Ohio conducts a monitoring and notification program of selected public and semi-private beaches to test the water quality and notify the public whenever bacteria levels present a potential health risk to those engaged in water activities. BeachGuard provides data on advisories as well as monitoring activity. Wisconsin Resources Blue-Green Algae Information
				Resources from Wisconsin's Department of Natural Resources. Blue-Green Algae Health Information
				Resources from Wisconsin's Department of Health Services. Harmful Algal Bloom Toolkit (PDF)
				A planning guide for public health and emergency response professionals from Wisconsin's Climate and Health Program.
 More **Information** Aug. 2019: Underwater Robots to Map, Measure Toxicity of Lake Erie Algal Blooms July 2019: NOAA, partners predict large summer harmful algal bloom for western Lake Erie Harmful Algal Bloom Monitoring System Harmful Algal Bloom Prevention, Control, and Mitigation NOAA Ecological Forecasting    Podcast: Uncovering the Mystery of Harmful Algal Blooms Podcast: Dealing with Dead Zones Video: Predicting Harmful Algal Blooms How do we forecast harmful algal blooms?    Great Lakes HABs Collaboratory Harmful Algae: Resources from Woods Hole Oceanographic Institution Harmful Algal Blooms: Resources from the Environmental Protection Agency Harmful Algal Blooms: Resources from the Centers for Disease Control   **Search** Our Stories    Get **Social** Social
 **Last updated:** 08/02/23 **Author:** NOAA How to cite this article Contact Us


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