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The US Environmental Protection Agency Region 9
The US Environmental Protection Agency (EPA) provides leadership in the nation's environmental science, research, education and assessment efforts. EPA works closely with other federal agencies, state and local governments, and Indian tribes to develop and enforce regulations under existing environmental laws. EPA is responsible for researching and setting national standards for a variety of environmental programs and delegates to states and tribes responsibility for issuing permits, and monitoring and enforcing compliance. Where national standards are not met, EPA can issue sanctions and take other steps to assist the states and tribes in reaching the desired levels of environmental quality. The Agency also works with industries and all levels of government in a wide variety of voluntary pollution prevention programs and energy conservation efforts.

Region 9 of the U. S. Environmental Protection Agency (EPA) covers Arizona, California, Hawaii, Nevada, the Pacific Islands subject to U.S. law, and approximately 140 Tribal Nations. EPA Region 9 works with state, local, and tribal governments in the region to carry out the nation's environmental laws. EPA Region 9's main office is at 75 Hawthorne Street, San Francisco, California, 94105.

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