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Western Lake Erie Basin

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Western Lake Erie Basin

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What’s Happening in Lake Erie?

The western part of Lake Erie, also known as the Western Lake Erie Basin (WLEB), is experiencing seasonal harmful algal blooms (HABs). These blooms can contain toxins that are harmful for humans, pets, and aquatic organisms.

The HABs are made up of cyanobacteria (blue-green algae) and need sunlight, warm water temperatures, and nutrients, such as phosphorus and nitrogen, to grow and produce toxins. A number of factors cause the HABs to grow, including nutrient-rich water from wastewater treatment plants and farm fields, the effects of invasive species that increase water clarity, water temperatures over 70 F, and others that aren’t quite understood yet.

Though the causes are complex, the State of Michigan is committed to improving the water quality of Lake Erie, ensuring safe water, and supporting healthy ecosystems. Michigan’s portion of the WLEB covers watersheds in five Michigan counties (Hillsdale, Lenawee, Monroe, Washtenaw, and Jackson). Michigan is focusing on the planning and implementation of conservation practices to improve soil health and water quality.

Addressing Water Quality in Michigan’s Portion of the WLEB

The Michigan Department of Agriculture and Rural Development (MDARD) along with the departments of Environment, Great Lakes, and Energy (EGLE); and Natural Resources (DNR) created the Domestic Action Plan (DAP). The DAP outlines how the state of Michigan plans to reduce the amount of phosphorus, which causes the algae to grow, from entering Lake Erie. The departments also created the Adaptative Management Plan (AMP), which is a companion document to the DAP. The AMP is a management tool used to evaluate the projects outlined in the DAP and update those projects as needed to meet water quality goals.

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