Lakes with Improving Water Quality

Which lakes are actually improving: multi-year EPA monitoring trends, the named recoveries still in progress, and what it takes to move the readings.

The lakes with the steepest multi-year declines in clarity and the sharpest rises in nutrients, what is driving the drop, and which ones may recover.

A data snapshot of the lakes we track: the clearest and the greenest states, and where the water is improving.

How nutrient and algae readings are read against EPA ecoregion condition classes, what each class means in the water, and why a clean reading is not a clearance.