The Auglaize Watershed (HUC 04100007) covers approximately 2,248 square miles in northwest Ohio and northeast Indiana. The watershed is primarily agricultural, with row crop and livestock production dominating land use. The hydrology of the watershed is characterized by a dendritic network of streams and rivers that flow into the Maumee River. The area experiences continental climate, with average annual precipitation of 35-40 inches. In the winter, snowpack can accumulate for extended periods of time due to the relatively flat terrain. Surface water quality in the watershed is impacted by agricultural runoff, which can contain nutrients and sediment. The watershed includes several reservoirs, including Grand Lake St. Marys, which has experienced harmful algal blooms due to nutrient loading. Climate change is projected to bring warmer and wetter conditions to the region, which could exacerbate nutrient pollution and impact water resources.