Moderate Harmful Algal Bloom Predicted for Western Lake Erie This Summer
TOLEDO, Ohio — Federal scientists are forecasting a moderate harmful algal bloom (HAB) for western Lake Erie this summer, though conditions could shift in the coming weeks. The National Oceanic and Atmospheric Administration (NOAA) released its early-season projections, indicating a potential severity range between 2 and 5.5 on its scale.
The severity of these blooms depends largely on phosphorus runoff from the Maumee River, which flows into the lake. Heavy spring rains, including a major precipitation event in early April, have contributed to higher phosphorus levels—a key factor in algal growth.
What This Means for Lake Erie
Harmful algal blooms, dominated by cyanobacteria, produce toxins that can threaten drinking water, wildlife, and local economies. Microcystin, a liver toxin found in these blooms, poses risks to human health, forcing cities to increase water treatment efforts and close beaches.
While this year’s bloom is expected to be moderate—falling between 3 and 5 on NOAA’s severity index—experts caution that size doesn’t always correlate with toxicity. Even smaller blooms can be dangerous.
Ohio State University researchers estimate that HABs cost the Lake Erie region over $70 million annually in lost tourism, fishing revenue, and water treatment expenses.
Ongoing Monitoring and Next Steps
NOAA will refine its forecast with weekly updates through mid-June before issuing its final seasonal prediction on June 25. Scientists are closely tracking rainfall and phosphorus levels, which could alter the bloom’s intensity.
Residents and visitors are urged to stay informed, especially before swimming, boating, or fishing in affected areas. For real-time updates, NOAA provides resources on its coastal science website.
— Reported by Nexio News
