November 16, 2009 – The Center submitted condemning evidence to the Nevada Division of Environmental Protection demonstrating that Lake Mead, Las Vegas Bay, and Las Vegas Wash are being polluted by unregulated endocrine-disrupting chemicals. We requested that the state include these water bodies on Nevada's list of impaired waters pursuant to section 303(d) of the Clean Water Act and establish and enforce limitations.
January 20, 2010 – The Center submitted comments opposing Nevada's plan to allow the discharge of 25 million gallons per day of effluent into Las Vegas Wash and Lake Mead without requiring the removal of endocrine-disrupting chemicals.
November 2010 – The Environmental Protection Agency announced a plan to finally ban endosulfan, a highly toxic pesticide and endocrine disruptor that for decades threatened rare wildlife species and been linked to severe human health problems. The EPA stated that the pesticide would be phased out by 2016 across the United States.
June 23, 2015 – The EPA announced a plan to analyze the impacts of atrazine and glyphosate — the two most commonly used pesticides in the United States — on 1,500 endangered plants and animals in the United States under the terms of a settlement reached with the Center.
February 19, 2016 – Under the terms of a historic settlement reached with the Center, U.S. Fish and Wildlife Service announced a plan to analyze the impacts of atrazine and glyphosate on 1,500 endangered U.S. plants and animals.
May 3, 2016 – A preliminary risk assessment by the EPA found that the amount of the herbicide atrazine that's released into the environment in the United States is likely harming most species of plants and animals.