California’s Dirty Secret: The Five Coal Plants Supplying Our Electricity

The “invisible” fossil fuel that may be powering your lifestyle

The Navajo Generating Station is coal-fired power plant in Arizona, just outside the Grand Canyon National Park. It’s one of two coal plants that supplies more than 40% of Los Angeles’ power.

Here in California, you hear a lot about our “green” reputation.  We have one of the most ambitious greenhouse gas reduction goals in the country, and the state is certainly a hotbed for new solar and wind energy investments and installations. We also have a law that says electricity providers have to get 33% of their power from renewable sources by 2020.

So… you might be surprised to hear that coal — that’s right, dirty ol’ coal — is still very much a part of the power supply in parts of Southern California. If you’re one of the 1.4 million residents of Los Angeles who gets power from the city’s Department of Water and Power, about 40% of your electricity comes from coal.

But how’s that possible?  Here in California, we don’t have much in the way of coal deposits, and no significant coal power plants. But we do have several public utilities that own portions of out-of-state coal power plants, and that entitles them to lots of less-than-clean, coal-fired energy.

There are five out-of-state coal plants providing power to California, and according to the Sierra Club, two of them — the Four Corners Power Plant and the San Juan Generating Station, both in New Mexico — are the two top mercury-emitting power plants in the United States. Here’s the lineup:

1. Navajo Generating Station – Arizona
Total Capacity: 2,409 Megawatts (MW)

2. Reid Gardner Generating Plant – Nevada
Total Capacity: 612 MW

  • California’s Department of Water Resources owns more than 67% of this plant (183 MW).  According to the DWR, Reid Gardner supplies more than 18% of the agency’s power. Its contract expires in 2013, and DWR has said it will not renew the agreement.
  • In 2007, the Environmental Integrity Project rated Reid Gardner Generating Plant as the nation’s dirtiest coal plant in terms of CO2 emissions. (3,500 lbs of CO2 emitted per megawatt-hour, compared with an average of 2,000 lbs.)

3. Intermountain Power Plant – Utah
Total Capacity: 1,640 MW

  • Several California companies, primarily LA’s DWP, own rights to 96% (1,574 MW) of energy generation.

4. Four Corners Power Plant – New Mexico
Total Capacity: 2,070 MW

  • Southern California Edison, which supplies power to approximately 14 million Californians, owns 48% of this plant (786 MW). The utility has applied to sell its share by 2012.

5. San Juan Generating Station – New Mexico
Total Capacity: 1,848 MW

  • Two of the plants four units are owned in large part by California cities, towns, and agencies.
  • As Sommer reported in her radio piece, PNM, the parent company of the San Juan GeneratingStation, “has struggled to meet air quality standards and the Environmental Protection Agency ordered the plant to install new pollution control equipment.”

Here’s a map from the Sierra Club showing where the coal plants that supply California are located.

View California Coal Plants in a larger map

Listen to Lauren Sommer’s radio report about California’s struggle to quit coal.

California’s Dirty Secret: The Five Coal Plants Supplying Our Electricity 2 February,2018Gretchen Weber

3 thoughts on “California’s Dirty Secret: The Five Coal Plants Supplying Our Electricity”

  1. Excellent reporting!

    Now consider reporting on how the grid lines currently bringing dirty coal power from the five plants can be used to bring wind, solar, and geothermal power to California, especially as the coal plants progressively get closed down.

  2. I work for PNM, the New Mexico electric utility that operates San Juan Generating Station on behalf of 8 other owners, and this piece contains significant factual errors about the plant:

    * Contrary to allegations by the Sierra Club, the San Juan plant is one of the top-performing coal plants in the nation in terms of mercury removal. In fact, the plant already is prepared to meet proposed, new EPA limits on mercury emissions. More info:

    * The plant fully complies with the federal Clean Air Act and we are proud of its environmental performance. In fact, plant owners just recently spent $320 million to install state-of-the-art emissions controls. As a result of those upgrades, emissions of nitrogen dioxide fell by 44 percent, sulfur dioxide by 71 percent, particulate matter by 72 percent and mercury by 87 percent.

    * The EPA has approved its own plan to require the plant to install additional controls to improve visibility in area parks and wilderness areas. We are appealing this ruling because of the enormous expense of the EPA-required technology. The State of New Mexico has approved its own plan for San Juan that would further improve air quality and meet federal requirements but do so at one-tenth of the cost ($77 million versus about $750 million or more for the EPA-required technology). We support the state plan and are willing to make this new investment. Ultimately, the costs of complying with either plan will be borne by the 2 million electric users in New Mexico, Arizona, Utah and California the plant serves and who depend on the plant for reliable, affordable power.

    We are committed to continuing to improve the plant’s performance and would appreciate the opportunity to comment in advance of publication on any future stories regarding San Juan Generating Station. More info on the plant is available at Thank you.

    Don Brown
    Customer and Corporate Communications
    Albuquerque, N.M.

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