The Maumee region of the lake includes Maumee Bay, where the Maumee River empties into the western basin. The Maumee River is the largest watershed in the western Lake Erie basin and carries large quantities of sediment and nutrients into the lake along with its water. Because of this large influx of sediments from the river, Maumee Bay tends to be the epicenter of large algal blooms on an annual basis.

The Maumee region score is made up of eleven indicators that had adequate data. The highest-scoring indicator was recreational toxin. The lowest-scoring indicator was chlorophyll a. Read more about the specific indicator scores here.