Tracking progress toward strategies to reduce phosphorus metric: how it’s calculated

Under the Great Lakes Water Quality Agreement, jurisdictions in the western and central Lake Erie basins were required to develop Domestic Action Plans (DAPs) to establish strategies to meet the phosphorus reduction goals. Progress is determined by whether jurisdictions have fulfilled their requirements in developing a DAP. Success in controlling sources of phosphorus to Lake Erie should alleviate harmful algal blooms and hypoxia in the western and central basins, respectively. Progress toward this metric is not included in the overall goal progress gauge.