Freshwater pollution

FILE - In this Feb. 12, 2018, file photo, Environmental Protection Agency Administrator Scott Pruitt attends a meeting with state and local officials in the State Dining Room of the White House in Washington. The Trump administration is rewriting Obama-era rules governing pollution from oil and gas operations and coal ash dumps, moves that opponents say will significantly weaken protections for human health and the environment. The EPA announced the changes Thursday, March 1, the latest in series of actions in the last year to roll back regulations opposed by the fossil-fuel industry. (AP Photo/Carolyn Kaster, File)

A boys holds a poster of Pope Francis as he waits for the arrival of Pope Francis in Puerto Maldonado, Madre de Dios province, Peru, Friday, Jan. 19, 2018. Francis is expected to meet with several thousand indigenous people gathering in a coliseum in Puerto Maldonado, the city considered a gateway to the Amazon, in the first full day of the pontiff's visit to Peru. (AP Photo/Rodrigo Abd)

FILE - In this Friday, Aug. 29, 2014 file photo, Pinot Noir grapes just picked are shown in a bin in Napa, Calif. Federal scientists have determined that a family of widely used pesticides poses a threat to dozens of endangered and threatened species, including Pacific salmon, Atlantic sturgeon and Puget Sound orcas. The National Marine Fisheries Service issued its new biological opinion on three organophosphate pesticides _ chlorpyrifos, diazinon and malathion _ after a years-long court fight by environmental groups. (AP Photo/Eric Risberg, File)

FILE - This Feb. 13, 2017, aerial file photo shows a site where the final phase of the Dakota Access Pipeline near the Missouri River took place with boring equipment routing the pipeline underground and across Lake Oahe to connect with the existing pipeline in Emmons County in Cannon Ball, N.D. A federal judge on Monday, Dec. 4, 2017, ordered the Army Corps of Engineers and pipeline developer Energy TransFer Partners to complete an oil spill response plan for a section of the pipeline beneath the Missouri River in North Dakota. (Tom Stromme/The Bismarck Tribune via AP, File)

In this Sept. 20, 2017, file photo, Sen. Richard Burr, R-N.C., listens on Capitol Hill in Washington. Burr and Sen. Thom Tillis issued statements Nov. 15, saying they will vote against Michael Dourson to serve as head of EPA's Office of Chemical Safety and Pollution Prevention. (AP Photo/Alex Brandon, File)

Member of the Texas Campaign for the Environment prepare to deliver over 2,300 letters from Texas families to the Environmental Protection Agency's Region VI office in Dallas, Thursday, Oct. 12, 2017. The letters are calling for saving federal cleanup programs under the Trump Administration. The EPA has approved a plan to remove sediments laced with highly toxic dioxin from a partially submerged Superfund site near Houston damaged during Hurricane Harvey. (AP Photo/LM Otero)

In this Sept. 13, 2017 photo, a boat with a dive flag is shown at San Jacinto River Waste Pits near the Interstate 10 bridge over the river in Channelview, Texas. The Environmental Protection Agency says an unknown amount of a dangerous chemical linked to birth defects and cancer may have washed downriver from a Houston-area Superfund site during the flooding from Hurricane Harvey. (AP Photo/David J. Phillip)