Graph: Trends in Nitrate Levels in Maumee River

Detailed Description

The Maumee River flows through northwest Ohio into Lake Erie. Nitrate concentrations in the Maumee River increased rapidly between 1945 and 1980 as nitrogen inputs from fertilizer and livestock increased. Since 1980, changes in nitrate levels have been much smaller as nitrogen inputs leveled off.

Details

Image Dimensions: 1000 x 769