In 2007, Florida's Pinellas County won EPA approval for a nutrient plan for Lake Seminole. 17 years later, chlorophyll a dropped from 124 to 36 µg/L, proving restoration worked

Lake Seminole restoration is showing something Florida communities rarely get to see: a troubled urban lake actually getting better. In Pinellas County, years of work have helped push down the algae linked to excess nutrients. The northern lobe now averages about 36 micrograms of chlorophyll-a per liter, compared with much higher historical readings. The change did not happen overnight. It came through years of nutrient controls, sediment removal and careful monitoring.