Freshwater pollution

FILE - In this Sept. 9, 2010, file photo, a massive fire roars through a neighborhood in San Bruno, Calif. U.S. transportation officials have finalized long-delayed measures meant to prevent pipeline spills and deadly gas explosions but don't address recommended steps to lessen accidents once they occur. They had been in the works for almost a decade following a massive gas explosion in San Bruno. (AP Photo/Paul Sakuma, File)

Environmental Protection Agency Administrator Andrew Wheeler, right, signs a document in front of Assistant Secretary of the Army for Civil Works R.D. James to revoke the Waters of the United States rule, an Obama-era regulation that provided federal protection to many U.S. wetlands and streams, Thursday, Sept. 12, 2019, in Washington. (AP Photo/Patrick Semansky)

FILE - In this June 7, 2018, file photo, a puddle blocks a path that leads into the Panther Island Mitigation Bank near Naples, Fla. The Trump administration on Thursday, Sept. 12, 2019, revoked an Obama-era regulation that shielded many U.S. wetlands and streams from pollution but was opposed by developers and farmers who said it hurt economic development and infringed on property rights. (AP Photo/Brynn Anderson)

Environment experts take samples of the Vistula river waters at the site where they are being contaminated with sewage after the city's main sewage treatment plant malfunctioned,in Warsaw, Poland, Thursday, Aug. 29, 2019. The contaminated water is flowing north toward the Baltic Sea and residents on its route have been warned. (AP Photo/Czarek Sokolowski)

FILE - In this July 26, 2019, file photo, Michigan Gov. Gretchen Whitmer speaks during a session at the National Governor's Association conference in Salt Lake City. Five Democratic governors of states in the Great Lakes region want candidates in next year's presidential election, including President Trump, to back a plan for protecting their freshwater resources. Led by Whitmer, the governors on Monday, July 29, 2019, proposed a six-point platform that seeks increases in federal spending on water treatment infrastructure and environmental cleanups. (Rick Egan/The Salt Lake Tribune via AP, File)

Democratic presidential candidate Sen. Kamala Harris, D-Calif., arrives at a Women of Color roundtable discussion, Tuesday, July 16, 2019, in Davenport, Iowa. (AP Photo/Charlie Neibergall)

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)

This cover image released by Atria Books shows "Exposure: Poisoned Water, Corporate Greed, and One Lawyer’s Twenty-Year Battle Against DuPont" by Robert Bilott, which will release in October. (Atria Books via AP)

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)

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)