The Environmental Protection Agency (EPA) is an independent executive agency of the United States federal government tasked with environmental protection matters. President Richard Nixon proposed the establishment of EPA on July 9, 1970; it began operation on December 2, 1970, after Nixon signed an executive order. The order establishing the EPA was ratified by committee hearings in the House and Senate. The agency is led by its administrator, who is appointed by the president and approved by the Senate. The current administrator is Michael S. Regan. The EPA is not a Cabinet department, but the administrator is normally given cabinet rank.
The EPA has its headquarters in Washington, D.C., regional offices for each of the agency's ten regions, and 27 laboratories. The agency conducts environmental assessment, research, and education. It has the responsibility of maintaining and enforcing national standards under a variety of environmental laws, in consultation with state, tribal, and local governments. It delegates some permitting, monitoring, and enforcement responsibility to U.S. states and the federally recognized tribes. EPA enforcement powers include fines, sanctions, and other measures. The agency also works with industries and all levels of government in a wide variety of voluntary pollution prevention programs and energy conservation efforts.
In 2018, the agency had 14,297 employees. More than half of EPA's employees are engineers, scientists, and environmental protection specialists; other employees include legal, public affairs, financial, and information technologists.
Many public health and environmental groups advocate for the agency and believe that it is creating a better world. Other critics believe that the agency commits government overreach by adding unnecessary regulations on business and property owners.

1970Dec, 2
The United States Environmental Protection Agency begins operations.
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Events on 1970
- 12Jan
Nigerian Civil War
Biafra capitulates, ending the Nigerian Civil War. - 28Apr
Richard Nixon
Vietnam War: U.S. President Richard Nixon formally authorizes American combat troops to fight communist sanctuaries in Cambodia. - 5Sep
101st Airborne Division
Vietnam War: Operation Jefferson Glenn begins: The United States 101st Airborne Division and the South Vietnamese 1st Infantry Division initiate a new operation in Thừa Thiên-Huế Province. - 28Sep
Gamal Abdel Nasser
Egyptian President Gamal Abdel Nasser dies of a heart attack in Cairo. Anwar Sadat is named as Nasser's temporary successor, and will later become the permanent successor. - 8Oct
Richard Nixon
Vietnam War: In Paris, a Communist delegation rejects US President Richard Nixon's October 7 peace proposal as "a manoeuvre to deceive world opinion".