The EPA no longer lists "science" as what it does.

The EPA's Office of Science and Technology has historically been in charge of developing clean water standards for states. Before January 30 of this year, the website said those standards were "science-based," meaning they were based on what peer-reviewed science recommended as safe levels of pollutants for drinking, swimming, or fishing. Since January 30, though, the reference to "science-based" standards has disappeared. Now, the office, instead, says it develops "economically and technologically achievable standards" to address water pollution.

http://www.motherjones.com/environment/2017/03/epa-science-technology-office-removed-science