Hanford Nuclear Reservation

The disaster at Fukushima has raised questions around the world about nuclear safety. But contamination is much worse in the Pacific Northwest of the United States. The former plutonium plant in Hanford, Washington is one of the most contaminated places on earth, and still decades from being cleaned up.

The weapons production reactors were decommissioned at the end of the Cold War, but the manufacturing process left behind 53 million U.S. gallons (204,000 m³) of high-level radioactive waste that remains at the site.

This represents two-thirds of the nation's high-level radioactive waste by volume. Today, Hanford is the most contaminated nuclear site in the United States and is the focus of the nation's largest environmental cleanup.

While most of the current activity at the site is related to the cleanup project, Hanford also hosts a commercial nuclear power plant, the Columbia Generating Station, and various centers for scientific research and development, such as the Pacific Northwest National Laboratory and the LIGO Hanford Observatory.

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