Jurisdiction: District of Columbia

Date Action Topic Type Excerpt Jurisdiction
2016-10-27 Connecticut v. Hyundai Motor Co. Air Pollution, Climate Change Mitigation Lawsuit vs. Private Actors

Multi-state settlement of consumer-protection claims against car manufacturers that overstated their vehicles’ fuel efficiency.

 Alabama, Arizona, Arkansas, California, Colorado, Connecticut, Delaware, District of Columbia, Florida, Georgia, Illinois, Indiana, Iowa, Kansas, Kentucky, Maine, Maryland, Massachusetts, Missouri, Nebraska, Nevada, New Jersey, New Mexico, North Carolina, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, Tennessee, Texas, Virginia, Washington, Wisconsin
2016-06-28 Settlement with Volkswagen for Emissions Defeat Devices Air Pollution Lawsuit vs. Private Actors

Settlement of consumer protection claims raised by a multi-state coalition of state attorneys general against Volkswagen for selling vehicles equipped with “defeat device” software intended to circumvent emissions standards and concealing this software from regulators and the public.

 Alabama, Alaska, Arkansas, Colorado, Connecticut, Delaware, District of Columbia, Florida, Georgia, Hawaii, Idaho, Illinois, Indiana, Iowa, Kansas, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada, New Hampshire, New York, North Carolina, North Dakota, Ohio, Oregon, Pennsylvania, Puerto Rico, Rhode Island, South Carolina, South Dakota, Tennessee, Utah, Virginia, Washington, Wisconsin, Wyoming
2016-05-18 Green 20 State AG Coalition Climate Change Mitigation Other

Group of 17 state AGs and Former Vice President Al Gore announced a coalition of states committed to taking creative steps to combat climate change, including investigations into fossil fuel companies and climate-related disclosures.

 California, Connecticut, District of Columbia, Illinois, Iowa, Maine, Maryland, Massachusetts, Minnesota, New Mexico, New York, Oregon, Rhode Island, U.S. Virgin Islands, Vermont, Virginia, Washington
2015-11-03 West Virginia v. EPA Climate Change Mitigation Defense of Federal Standards

Multi-state intervention to join EPA’s defense of Clean Power Plan against challenge mounted by other states and industry petitioners.

 California, Connecticut, Delaware, District of Columbia, Hawaii, Illinois, Iowa, Maine, Maryland, Massachusetts, Minnesota, New Hampshire, New Mexico, New York, Oregon, Rhode Island, Vermont, Virginia, Washington
2015-10-23 North Dakota v. EPA (Power Plants) Climate Change Mitigation Defense of Federal Standards

Multiple states joined as defendant-intervenors in support of EPA in lawsuit challenging New Source Performance Standards (NSPS) for carbon dioxide emissions from new and modified power plants.

 California, Connecticut, Delaware, District of Columbia, Hawaii, Illinois, Iowa, Maine, Maryland, Massachusetts, Minnesota, New Hampshire, New Mexico, New York, Oregon, Rhode Island, Vermont, Virginia, Washington
2015-08-28 Murray Energy Corp. v. EPA Water Pollution Defense of Federal Standards

Multiple sates intervened to support EPA’s defense of the Waters of the U.S. rule.

 Connecticut, District of Columbia, Hawaii, Massachusetts, New York, Oregon, Vermont, Washington
2015-06-29 Michigan v. EPA Air Pollution Defense of Federal Standards

Multiple states intervened in lawsuit to defend EPA standards regulating mercury and other air pollutants from the power sector.

 California, Connecticut, Delaware, District of Columbia, Illinois, Iowa, Maryland, Massachusetts, Minnesota, New Hampshire, New Mexico, New York, North Carolina, Rhode Island, Vermont
2014-04-29 EPA v. EME Homer City Generation Air Pollution Defense of Federal Standards

Multiple states intervened in lawsuit to support EPA rule on cross-state air pollution against state and industry challenge.

 Connecticut, Delaware, District of Columbia, Illinois, Maryland, Massachusetts, New York, North Carolina, Rhode Island, Vermont
2009-02-24 American Farm Bureau Federation v. EPA Air Pollution Lawsuit vs. Federal Government

Multi-state lawsuit challenging the adequacy of EPA’s 2006 revision to the National Ambient Air Quality Standards (NAAQS) regulating soot pollution under the Clean Air Act.

 Arizona, California, Connecticut, Delaware, District of Columbia, Illinois, Maine, Maryland, Massachusetts, New Hampshire, New Jersey, New Mexico, New York, Oregon, Pennsylvania, Rhode Island, Vermont
2007-04-02 Massachusetts v. EPA Climate Change Mitigation Lawsuit vs. Federal Government

Multi-state challenge to EPA denial of petition to regulate greenhouse gas emissions from motor vehicles under Clean Air Act.

 California, Connecticut, District of Columbia, Illinois, Maine, Massachusetts, New Jersey, New Mexico, New York, Oregon, Rhode Island, Vermont, Washington
2006-03-17 New York v. EPA Air Pollution Lawsuit vs. Federal Government

Multi-state challenge to 2002 EPA rule amending and expanding the routine maintenance, repair and replacement exceptions to the New Source Review program.

 California, Connecticut, Delaware, District of Columbia, Illinois, Maine, Maryland, Massachusetts, New Hampshire, New Jersey, New Mexico, New York, Pennsylvania, Rhode Island, Vermont, Wisconsin
2005 New York v. EPA Air Pollution Lawsuit vs. Federal Government

Multi-state challenge to 2002 EPA rule amending the New Source Review (NSR) program and narrowing the definition of “modification” to exclude certain sources from NSR requirements.

 California, Connecticut, Delaware, District of Columbia, Illinois, Maine, Maryland, Massachusetts, New Hampshire, New Jersey, New York, Pennsylvania, Rhode Island, Vermont, Wisconsin