Human visitors have flocked to the picturesque park as well, to sit, walk, watch, and even wed.Not bad for a wastewater treatment plant. Fed by five million gallons of treated wastewater every day, Fernhill’s constructed waterfalls add oxygen back to the flow. Constructed wetlands require active tending, such as periodic dredging, removal of invasive species, wildlife management, and even controlled burns. Wildlife EncountersAlong the Atlantic Flyway in central Florida, the Brevard County Wastewater Treatment Plant similarly transformed 200 acres of pastureland back into water-filtering wetlands in 1998. Improving that flow can lower the concentration of other contaminants—essentially using treated wastewater to help dilute pollution—while nourishing the downstream estuary’s wildlife.