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[[Image:Coal plant on mesa.jpg|thumb|right|Coal plant on Black Mesa]]One of the largest coal-fired generating stations in the United States, Four Corners is located on Navajo land in Fruitland, New Mexico. The plant’s two active units generate 1636 megawatts of electricity and are operated by [[Arizona Public Service Company]], which serves about 300,000 homes in New Mexico, Arizona, California, and Texas.<ref>[http://www.pnm.com/systems/4c.htm Four Corners Power Plant,] PNM website</ref> According to the American Lung Association, the following people in San Juan County are at elevated risk from power plant pollution: 2,885 people with pediatric asthma, 8,442 with adult asthma, 5,219 with COPD, 9,418 with diabetes, 6,607 with cardiovascular disease, 15,612 who are 65 and older, and 27,265 with low incomes. The ALA states that although "[d]angerous levels of air pollution can harm everyone, even healthy adults," those in high-risk categories are particularly vulnerable.<ref>[http://www.stateoftheair.org/2015/key-findings/people-at-risk.html#a5 "People at Risk,"] State of the Air 2015, American Lung Association</ref><ref>[http://www.stateoftheair.org/2015/states/new-mexico/san-juan.html "New Mexico: San Juan County,"] State of the Air 2015, American Lung Association</ref> Each year the plant emits 157 million pounds of [[Sulfur dioxide and coal|sulfur dioxide]], 122 million pounds of nitrogen oxides, 8 million pounds of soot and 2,000 pounds of [[Mercury and coal|mercury]]. The plant's five burners utilize utilizes [[scrubber]] technology to reduce sulfur dioxide and were installed in the 1960s.<ref>[http://www.epa.gov/osw/nonhaz/industrial/special/fossil/sites/nn-visit.pdf EPA Site Visit Report Coal Combustion Waste Minefill Management Practices], U.S. EPA December 13, 2001.</ref>