The Sudbury-Assabet-Concord (SuAsCo) River Report Card compares 19 indicators of river health to scientifically derived thresholds. These individual indicators are combined to calculate scores for each of the five values identified by stakeholders—Water Quality, Streamflow, Scenery, Habitat, and Recreation—for each river's upper and lower segments. The scores for these five values are combined into an overall score for each of the six river segments (upper and lower segments for each of the three rivers). The overall grade for the SuAsCo watershed is the average of these six river segment scores, weighted by basin area.
