Lake Erie Harmful Algal Bloom Forecast (NOAA)
NOAA forecasts and tracks toxic algae in western Lake Erie through the summer so cities and swimmers can keep drinking water and people safe (NOAA NCCOS).
Image: NASA Goddard (Great Lakes, No Clouds, August 28, 2010).
Last reviewed: 4 sources cited
Explain Like I'm 10
- Sometimes tiny green living things called algae grow so much in Lake Erie that the water turns green.
- Some of this algae makes poison that can get into drinking water.
- NOAA watches the lake from space and from boats and warns people where the bad water is, like a weather report.
The Five W's of Lake Erie Harmful Algal Bloom Forecast (NOAA)
Who
NOAA's National Centers for Coastal Ocean Science and its Great Lakes Environmental Research Laboratory, with university partners.
Source: NOAA NCCOS, Western Lake Erie HAB Seasonal Forecast 2026
What
A seasonal forecast plus regular bulletins that show where the cyanobacteria When tiny water plants called algae grow out of control. Some make toxins that can harm people, pets and fish. Glossary is and where it is moving.
Source: NOAA NCCOS, Lake Erie Harmful Algal Bloom Forecasting
When
Every bloom season; the 2026 seasonal forecast came out June 25 and predicted a moderate bloom.
Source: NOAA NCCOS, Western Lake Erie HAB Seasonal Forecast 2026
Where
The western basin of Lake Erie, including Maumee Bay near Toledo, Ohio.
Source: NOAA NCCOS, Western Lake Erie HAB Seasonal Forecast 2026
Why
Phosphorus washing in from the Maumee River feeds blooms whose toxins can reach drinking water.
Source: NOAA NCCOS, Western Lake Erie HAB Seasonal Forecast 2026
Impact Statement
Agency solution · active
In August 2014 a bloom put toxins in Toledo's tap water and the city told 400,000 people not to drink it for two days. NOAA shared fast toxin data with the city and Ohio EPA to help keep drinking water safe.
Source: NOAA NCCOS, Timely toxin data helped Ohio deliver safe drinking water
For Further Information: NOAA NCCOS, Lake Erie Harmful Algal Bloom Forecasting
NOAA forecasts toxic algae on Lake Erie the way meteorologists forecast storms.
How This Saves People & the Planet
For People
Bulletins warn water plants and families where scum is, so people and pets can stay out of toxic water.
Source: NOAA NCCOS, Western Lake Erie HAB Seasonal Forecast 2026
For Nature
Beyond Lake Erie, the EPA's CyAN tool uses satellite data to flag possible algal blooms in more than 2,000 large U.S. lakes and reservoirs.
Source: US EPA, CyAN app
For Teachers
Discussion questions
- What is Lake Erie Harmful Algal Bloom Forecast (NOAA), and what problem does it help solve?
- Who is behind Lake Erie Harmful Algal Bloom Forecast (NOAA), and where does the work happen?
- How does Lake Erie Harmful Algal Bloom Forecast (NOAA) help both people and nature? Use one fact from this page.
Sources are listed with each fact in the Five W's above.
Cite This Page
APA
Saving Planets. (n.d.). Lake Erie Harmful Algal Bloom Forecast (NOAA). https://www.savingplanets.com/Lake_Erie_Algal_Bloom_Forecast.html
MLA
"Lake Erie Harmful Algal Bloom Forecast (NOAA)." Saving Planets, https://www.savingplanets.com/Lake_Erie_Algal_Bloom_Forecast.html.


