Freshwater pollution

FILE - This undated file photo shows Barrick Goldstrike Mines' Betze-Post open pit near Carlin, Nev. A three-judge panel with the U.S. Court of Appeals for the District of Columbia ruled Friday, July 19, 2019, that state and federal programs ensure mining companies take financial responsibility for their pollution. (Adella Harding/The Daily Free Press via AP, File)

Water flows through Conowingo Dam, a hydroelectric dam spanning the lower Susquehanna River near Conowingo, Md., on Thursday, May 16, 2019. Officials once counted on the dam to block large amounts of sediment in the Susquehanna from reaching Chesapeake Bay, the nation's largest estuary, but the reservoir behind the dam has filled with sediment far sooner than expected. (AP Photo/Steve Ruark)

In this June 3, 2017 photo, Dr. Joan Perry of Kinston, left, answers a question during a debate with and state Rep. Greg Murphy, a Greenville physician, in Greenville, N.C. The two Republicans are running in a special primary election to be held July 9 for North Carolina's 3rd Congressional seat. (Deborah Griffin/The Daily Reflector via AP)

Johnny Rowan stands outside Burning River Coffee, Friday, June 14, 2019, in Lakewood, Ohio. Rowan’s is one of 90 active businesses registered with the state that have “burning river” in their names, inspired by the Cuyahoga River’s most famous fire. (AP Photo/Tony Dejak)

FILE - In this Jan. 25, 2017 file photo, heavy equipment is used at an ash storage site at Gallatin Fossil Plant in Gallatin, Tenn. The nation’s largest public utility has agreed to dig up and remove about 12 million cubic yards of coal ash from unlined pits at Gallatin Fossil Plant. In a Thursday, June 13, 2019 settlement, the Tennessee Valley Authority says it will excavate a majority of coal ash at its Gallatin Fossil Plant. .(AP Photo/Mark Humphrey, File)

FILE - This Thursday, Aug. 2, 2018, file photo shows the U.S. Food and Drug Administration building behind FDA logos at a bus stop on the agency's campus in Silver Spring, Md. The Food and Drug Administration’s first broad testing of food for a worrisome class of nonstick, stain-resistant industrial compounds found high levels in some grocery store meats and seafood and in off-the-shelf chocolate cake, according to unreleased findings FDA researchers presented at a scientific conference in Europe. (AP Photo/Jacquelyn Martin, File)

FILE - This Aug. 7, 2014, file photo, shows a contract employee watching a crews excavate contaminated soil at a site where millions of gallons of jet fuel leaked underground over decades at Kirtland Air Force Base in Albuquerque, N.M. A coalition of state lawmakers and nonprofit groups took the first step toward suing the U.S. Air Force on Friday, May 31, 2019, saying it wants firm deadlines for cleaning up jet fuel contamination at a base bordering New Mexico's largest city. The coalition filed a notice of intent to sue, saying the contamination at Kirtland Air Force Base near Albuquerque is a danger to public health and the environment. It wants an agreement that sets a cleanup schedule with clear deadlines and penalties. (AP Photo/Susan Montoya Bryan, File)

FILE - In this Monday, April 11, 2016 file photo, New Hampshire state and local officials load boxes of free bottled water in in Litchfield, N.H. New Hampshire is suing eight companies including 3M and Dupont for damage it says has been caused statewide by a class of potentially toxic chemicals found in everything from pizza boxes to fast-food wrappers. The state becomes the second in the nation to go after the makers of perfluoroalkyl and polyfluoroalkyl substances or PFAS and the first to target statewide contamination. (AP Photo/Jim Cole, File)

In this April 8, 2019, photo, Tim Tanksley, who has been fighting for years trying to convince Oklahoma lawmakers to crack down on the coal ash dumping, stands outside a dump site in Bokoshe, Okla. President Donald Trump’s EPA has approved Oklahoma to be the first state to take over permitting and enforcement on coal-ash sites. “They’re going to do absolutely nothing,” Tanksley said. (AP Photo/Sue Ogrocki)