Tributary Data on ErieStat

The United States and Canada adopted phosphorus load reduction targets to combat Lake Erie algal blooms. 

Ohio outlines actions to reduce phosphorus in Lake Erie.

Michigan outlines actions to reduce phosphorus loading to Lake Erie.

This document outlines federal and state efforts to achieve the binational phosphorus load reduction targets adopted in 2016 under the Great Lakes Water Quality Agreement.

Pennsylvania outlines actions to reduce phosphorus in Lake Erie.

Indiana outlines actions to reduce phosphorus in Lake Erie. The button below provides the Action Plan, but for additional information on the plan development process, Indiana"s DAP website outlines these details.

The Great Lakes Water Quality Agreement (GLWQA), signed by Canada and the United States, is a commitment to protect the waters of the Great Lakes. It was most recently updated in 2012. Annex 4 was formed to manage phosphorus concentrations and loadings (and other nutrients if warranted) in the Great Lakes.