While phosphorus and nitrogen are indispensable for the growth of aquatic flora, nutrient-rich wastewater results in eutrophication — an excessive growth of algae and plankton in bodies of water — which impairs freshwater and coastal marine ecosystems. To preserve these vital bodies of water and prevent eutrophication, wastewater treatment plants a...

With more than 2,800 contaminated sites in 50 states, public concern about per- and polyfluoroalkyl substances (PFAS) contamination has grown, yet a great deal about these so-called "forever chemicals" remains unknown. Faced with such uncertainty, the U.S. Environmental Protection Agency (EPA) has set no formal limits on a moving target like PFAS d...