EPA proposes NOx reduction plan for Navajo Generating Station coal plant

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The U.S. Environmental Protection Agency is proposing air pollution limits for Navajo Generating Station (NGS), the 2,250 MW coal-fired power plant jointly owned by Salt River Project, Los Angeles Department of Water & Power, Arizona Public Service, Nevada Power Company, Tucson Electric Power and the U.S. Bureau of Reclamation.

Navajo Generating Station

The EPA proposal is intended, in part, to address public health concerns. The proposal would also improve visibility in national parks through the Southwest (over the Grand Canyon, for example) by 73 percent, according to the EPA, as required under the Clean Air Act.

The EPA contends that the NGS can achieve the emission limit by installing a pollution control technology known as Selective Catalytic Reduction. In combination with the low-NOx burners installed at the NGS between 2009 and 2011, the measures would reduce emissions by 84 percent, or a total of 28,500 tons per year, by 2018, according to the EPA.

Under the proposal, the plant would have until 2023 to install new controls to achieve the emission limit.

A joint statement signed by the EPA, Department of the Interior and Department of Energy commits to helping develop "clean, affordable and reliable power, affordable and sustainable water supplies, and sustainable economic development, while minimizing negative impacts on those who currently obtain significant benefits from NGS, including tribal nations."

The proposal, upon publication, will be open for a 90-day public comment period.

For more:
- see the joint statement
- get the facts